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• Kernel Panic on VMware Workstation 7.1.3

  - by i.h4d35

  I've been trying to install either Arch Linux or Fedora 17 on VMWare Workstation (7.1.3). After I point to the right ISO image, I get the following error: Booting the kernel PANIC: early exception 0d rip:ffffffff81042dc4 error 0 cr2 0 I am trying to install it on a machine which has a 3rd generation i5 processor. After checking A VMWare panic early exception fix for ivy bridge i3, i5, i7, I tried to turn off the nosmep acpi. This is around, I get the same error but at a different address. Apparently, others have faced this issue before. Thanks in advance.

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• kernel: journal commit I/O error

  - by jasondewitt

  I am having some problems with a Dell 1950 server. I am installing RHEL 4.6 along with Oracle and some other software on here. I am randomly getting an error message saying "kernel: journal commit I/O error" on my ssh session and on the monitor I have hooked up to the server I see an error scrolling by that says "EXT3-fs error (device sda5) in start_transaction: Journal has aborted." It has happened several times but never at the same point during the install. Actually, this last time the system was up and running and I was just trying to import a database into oracle. This has happened on several hard drives, so I'm pretty sure that is not the problem. This makes me think the raid controller is going bad. What do you guys think? ** UPDATE ** Pretty sure it was a bad hard drive. I threw another drive in the server and it's been running for about 48 hours with out problems.

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• What are the mandatory Linux kernel modules to run inside of ESXi

  - by Marcin

  I'm used to rolling my own kernels for servers, as it nicely minimizes the number of exploits (and the resulting patches) to take care of. In a traditional (bare metal) world, the whole process is about knowing what you have (hardware), and what you need (Ethernet, IPv4, iptables, etc.) In a virtualized environment, some things stay the same (still need Ethernet and IPv4), some things go away (power management), and then there are some new needs (vxnet3, or vmware-tools, even though that's compiled outside of the kernel). So my question mostly concerns itself with the last two categories: what can I remove completely, and what new stuff do I want? For example, what IO scheduler do I want, if all my disk operations are going through another filesystem/scheduler/cache to get to the virtual disk? Do I need hyper-threading enabled, or is the VM going to show them to me anyway as a CPU anyway? Do I need Large Receive Offload turned on, or is that something that the hypervisor's network drivers are going to do for me?

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• kernel openvpn segfault

  - by Rex

  e.. I have some trouble about OPENVPN these days.. At first,I find that the OPENVPN is always down. Then I try to restart it.But after a short while,It's down again. Then I check /var/log/messages and find something below openvpn[4338]: xxx.xxx.xxx.xxx:48484 Re-using SSL/TLS context openvpn[4338]: xxx.xxx.xxx.xxx:48484 LZO compression initialized openvpn[4338]: xxx.xxx.xxx.xxx:48484 [abc.abc_] Peer Connection Initiated with xxx.xxx.xxx.xxx:48484 kernel: openvpn[4338]: segfault at 0000000000000018 rip 00002b75ca30ca2e rsp 00007fff153806a0 error 4 Obviously,OPENVPN is Down. So,I just want to know what's wrong here..... P.s. The username should be abc.abc.But it shows that is abc.abc_ Is there something wrong? CentOS 5.4 x64 Linux 2.6.18-238.9.1.el5 My English is very pool... :( Thanks~

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• Modifying kernel shared memory settings on a lion install

  - by andrewjl

  What's the location of the sysctl.conf file on lion? In Snow Leopard it was in /etc/sysctl.conf but now that folder doesn't contain it anymore. Searching for the file in spotlight yields no results. Have the shared memory settings been moved to a different conf file? What is it's name? EDIT I am trying to modify the kernel shared memory settings of the machine. When I didn't find the sysctl.conf file in the right place, I created my own with the recommended settings and put into /etc directory. However running sysctl -a still shows me that the old memory settings are in place. How do I go about modifying these on a lion install?

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• Sporadic unspecific kernel panic

  - by koma

  I'm experiencing seldom (so far about once a month) hard crashes on our ubuntu server 10.04 LTS box. The box itself is quite old (Dell PowerEdge 750 from 2004, Pentium4 2.8 GHz). I set up netconsole after it crashed twice last thursday and was able to extract the following output: [ 9354.062473] invalid opcode: 0000 [#1] SMP [ 9354.062516] last sysfs file: /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/uevent [ 9354.062555] Modules linked in: ppdev adm1026 hwmon_vid i2c_i801 bridge stp dcdbas psmouse serio_raw netconsole configfs shpchp lp parport usbhid hid e1000 [ 9354.062685] [ 9354.062704] Pid: 3988, comm: rsync Not tainted 2.6.38-12-generic-pae #51~lucid1-Ubuntu Dell Computer Corporation PowerEdge 750 /0R1479 [ 9354.062773] EIP: 0060:[<c104fef1>] EFLAGS: 00010046 CPU: 1 [ 9354.062802] EIP is at check_preempt_wakeup+0x181/0x250 [ 9354.062826] EAX: 00000002 EBX: f2a10ccc ECX: 00000000 EDX: 00000002 [ 9354.062850] ESI: f1db71cc EDI: f1db71a0 EBP: f1dbdea8 ESP: f1dbde8c [ 9354.062875] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 9354.062900] Process rsync (pid: 3988, ti=f1dbc000 task=f1db71a0 task.ti=f1dbc000) [ 9354.062933] Stack: [ 9354.062951] 0053ea60 f7907680 f28da840 f2a10ca0 c153ea60 f7907680 c153ea60 f1dbdebc [ 9354.063019] c103f98a f2a10ca0 f7907680 00000001 f1dbdef8 c104f97f 00000000 f2f0bacc [ 9354.063088] f7904338 00000001 00000003 00000000 f2f0bacc 00000001 00000001 00000086 [ 9354.063157] Call Trace: [ 9354.063183] [<c103f98a>] check_preempt_curr+0x6a/0x80 [ 9354.063210] [<c104f97f>] try_to_wake_up+0x5f/0x3f0 [ 9354.063236] [<c1077a00>] ? hrtimer_wakeup+0x0/0x30 [ 9354.063261] [<c104fd64>] wake_up_process+0x14/0x20 [ 9354.063286] [<c1077a1d>] hrtimer_wakeup+0x1d/0x30 [ 9354.063310] [<c1077f4a>] __run_hrtimer+0x7a/0x1c0 [ 9354.063336] [<c107dbad>] ? ktime_get+0x6d/0x110 [ 9354.063360] [<c1078310>] hrtimer_interrupt+0x120/0x2b0 [ 9354.063390] [<c1535c36>] smp_apic_timer_interrupt+0x56/0x8a [ 9354.063418] [<c152f459>] apic_timer_interrupt+0x31/0x38 [ 9354.063446] [<c1520000>] ? mca_attach_bus+0x5/0xc0 [ 9354.063469] Code: 8b 9b 20 01 00 00 8b 86 24 01 00 00 3b 83 24 01 00 00 75 e6 85 db 0f 84 a3 00 00 00 89 da 89 f0 e8 75 f6 fe ff 83 f8 01 0f 85 00 <fe> ff ff 89 f8 e8 95 f9 fe ff 8b 5e 1c 85 db 0f 84 e4 fe ff ff [ 9354.063804] EIP: [<c104fef1>] check_preempt_wakeup+0x181/0x250 SS:ESP 0068:f1dbde8c [ 9354.064231] ---[ end trace 290689cea65aea7f ]--- [ 9354.064290] Kernel panic - not syncing: Fatal exception in interrupt [ 9354.064352] Pid: 3988, comm: rsync Tainted: G D 2.6.38-12-generic-pae #51~lucid1-Ubuntu [ 9354.064424] Call Trace: [ 9354.064481] [<c152c057>] ? panic+0x5c/0x15b [ 9354.064539] [<c15302bd>] ? oops_end+0xcd/0xd0 [ 9354.064539] [<c100d9e4>] ? die+0x54/0x80 [ 9354.064539] [<c152f926>] ? do_trap+0x96/0xc0 [ 9354.064539] [<c100ba00>] ? do_invalid_op+0x0/0xa0 [ 9354.064539] [<c100ba8b>] ? do_invalid_op+0x8b/0xa0 [ 9354.064539] [<c104fef1>] ? check_preempt_wakeup+0x181/0x250 [ 9354.064539] [<c144884d>] ? __kfree_skb+0x3d/0x90 [ 9354.064539] [<c1042ae7>] ? update_curr+0x247/0x2a0 [ 9354.064539] [<c10447bb>] ? update_cfs_load+0x11b/0x2d0 [ 9354.064539] [<c1042a25>] ? update_curr+0x185/0x2a0 [ 9354.064539] [<c152f6bf>] ? error_code+0x67/0x6c [ 9354.064539] [<c104fef1>] ? check_preempt_wakeup+0x181/0x250 [ 9354.064539] [<c103f98a>] ? check_preempt_curr+0x6a/0x80 [ 9354.064539] [<c104f97f>] ? try_to_wake_up+0x5f/0x3f0 [ 9354.064539] [<c1077a00>] ? hrtimer_wakeup+0x0/0x30 [ 9354.064539] [<c104fd64>] ? wake_up_process+0x14/0x20 [ 9354.064539] [<c1077a1d>] ? hrtimer_wakeup+0x1d/0x30 [ 9354.064539] [<c1077f4a>] ? __run_hrtimer+0x7a/0x1c0 [ 9354.064539] [<c107dbad>] ? ktime_get+0x6d/0x110 [ 9354.064539] [<c1078310>] ? hrtimer_interrupt+0x120/0x2b0 [ 9354.064539] [<c1535c36>] ? smp_apic_timer_interrupt+0x56/0x8a [ 9354.064539] [<c152f459>] ? apic_timer_interrupt+0x31/0x38 [ 9354.064539] [<c1520000>] ? mca_attach_bus+0x5/0xc0 Googling for this issue didn't really turn up anything useful (most stuff I found was related to btrfs, but I don't use that, although the module exists and is sometimes loaded). From experience it might have to do with relatively heavy I/O, as two of the panics happened during a backup procedure. Kernel is 2.6.38-12-generic-pae, but I'm pretty sure I also saw panics on 2.6.32. I meanwhile upgraded to 3.0.0-17-generic-pae and am waiting for the next crash ;-) I'm at a loss here, so any pointers where to look for the cause or what it could be would be great :-) Thanks !

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• Mounting Solaris UFS partition on Debian(with FreeBSD kernel)

  - by hayalci

  I have some disks that were being used on a Solaris system. The disks are formatted as UFS. I attached them to a Debian system (with FreeBSD kernel. Debian/kFreeBSD), but I cannot mount them. $ mount -t ufs /dev/da2s1 /mnt/diska mount: /dev/da2s1 : Invalid argument Also the tunefs.ufs does not work; $ tunefs.ufs -p /dev/da2s1 tunefs.ufs: /dev/da2s1: could not read superblock to fill out disk Is there an incompatibility between FreeBSD UFS and Solaris UFS? Is it possible to mount one, under the other OS ? Note: tunefs.ufs works on the root partition $ tunefs.ufs -p /dev/da7s2 tunefs.ufs: ACLs: (-a) disabled tunefs.ufs: MAC multilabel: (-l) disabled tunefs.ufs: soft updates: (-n) disabled tunefs.ufs: gjournal: (-J) disabled tunefs.ufs: maximum blocks per file in a cylinder group: (-e) 2048 tunefs.ufs: average file size: (-f) 16384 tunefs.ufs: average number of files in a directory: (-s) 64 tunefs.ufs: minimum percentage of free space: (-m) 8% tunefs.ufs: optimization preference: (-o) time tunefs.ufs: volume label: (-L)

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• Error : [0.8879153] kernel panic -not syncing VFS unable to mount fs unknow block (8.3)

  - by user43069

  i installed ubuntu using wubit inside the windows and started working on it then i got this error afer updating [0.8879153] kernel panic -not syncing VFS unable to mount fs unknow block (8.3) and i can't user rescue mode and it's give me another error no filesystem could mount root ..... i looked at grub folder and didn' find any file on disks/boot/grub/ so i tryed to user super grub to fix it but it didn' work and it keep giving me. boot/grub/stage1 not found i didn't edit anything from grub folder. any idea plz .

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• What is auto-mounting my media volume?

  - by user285277

  Something is repeatedly mounting my "media" share, doing something with it, then quietly un-mounting it with no notifications at the user level. from the little I can gleaned from the console messages below, I thought I'd managed to stop it, if not understand it last night when I followed instructions for deleting all traces of the Google Update Daemon. I've not been using any Google apps whatsoever, so I was surprised to see that in Console. What's more surprising, and perhaps a little distressing, is that the same thing occurred this evening, when the Google Daemon is long gone. I don't have that log because I can't recall precisely what time it occurred. I'll do a search and provide it if you wish, though. In the meantime, any help with this would be extremely appreciated. I've asked over at Apple Discussions but I think it might be a little deeper than those manning the boards this weekend are comfortable with. It's certainly beyond my meager skills. With apologies in advance if this is more lines thank you need. Please note that I've transformed the Google links a little because the forum here requires more reputation points before one can post more than two links. 12/27/13 10:47:31.000 PM kernel[0]: memorystatus_thread: idle exiting pid 53629 [distnoted] 12/27/13 10:48:10.433 PM com.apple.Preview.TrustedBookmarksService[53640]: Failed to resolve bookmark data at index: 0; not stale; error: The file doesn’t exist. 12/27/13 10:48:10.434 PM com.apple.Preview.TrustedBookmarksService[53640]: Failed to resolve bookmark data at index: 1; not stale; error: The file doesn’t exist. 12/27/13 10:48:10.950 PM com.apple.SecurityServer[17]: Session 103257 created 12/27/13 10:48:34.328 PM com.apple.Preview.TrustedBookmarksService[53640]: Failed to resolve bookmark data at index: 2; not stale; error: The file doesn’t exist. 12/27/13 10:48:34.000 PM kernel[0]: AFP_VFS afpfs_mount: /Volumes/Media Archive-1, pid 53641 12/27/13 10:48:34.000 PM kernel[0]: AFP_VFS afpfs_mount : succeeded on volume 0xffffff80d6355008 /Volumes/Media Archive-1 (error = 0, retval = 0) 12/27/13 10:49:32.000 PM kernel[0]: wlEvent: en0 en0 Link DOWN virtIf = 0 12/27/13 10:49:32.000 PM kernel[0]: AirPort: Link Down on en0. Reason 8 (Disassociated because station leaving). 12/27/13 10:49:32.000 PM kernel[0]: en0::IO80211Interface::postMessage bssid changed 12/27/13 10:49:33.681 PM configd[16]: network changed: v4(en0-:10.0.1.12) DNS- Proxy- SMB 12/27/13 10:49:33.697 PM configd[16]: network changed: DNS* Proxy 12/27/13 10:49:35.475 PM KernelEventAgent[57]: tid 00000000 received event(s) VQ_NOTRESP (1) 12/27/13 10:49:35.000 PM kernel[0]: ASP_TCP Disconnect: triggering reconnect by bumping reconnTrigger from curr value 0 on so 0xffffff802176b4a0 12/27/13 10:49:35.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect started /Volumes/Media Archive-1 prevTrigger 0 currTrigger 1 12/27/13 10:49:35.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: doing reconnect on /Volumes/Media Archive-1 12/27/13 10:49:35.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: posting to KEA EINPROGRESS for /Volumes/Media Archive-1 12/27/13 10:49:35.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: Max reconnect time: 600 secs, Connect timeout: 15 secs for /Volumes/Media Archive-1 12/27/13 10:49:35.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: connect to the server /Volumes/Media Archive-1 12/27/13 10:49:35.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: connect on /Volumes/Media Archive-1 failed 65. 12/27/13 10:49:35.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: sleep for 1 seconds and then try again 12/27/13 10:49:35.479 PM KernelEventAgent[57]: tid 00000000 type 'afpfs', mounted on '/Volumes/Media Archive-1', from '//Me@Capsule._afpovertcp._tcp.local/Media%20Archive', not responding 12/27/13 10:49:35.487 PM KernelEventAgent[57]: tid 00000000 found 1 filesystem(s) with problem(s) 12/27/13 10:49:36.692 PM com.bourgeoisbits.cloak.agent[14503]: NetworkProfile: (null), (null), (null) (Connected: NO, Airport: NO, Open: NO) [trusted] 12/27/13 10:49:36.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: connect to the server /Volumes/Media Archive-1 12/27/13 10:49:36.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: connect on /Volumes/Media Archive-1 failed 65. 12/27/13 10:49:36.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: sleep for 2 seconds and then try again 12/27/13 10:49:38.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: connect to the server /Volumes/Media Archive-1 12/27/13 10:49:38.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: connect on /Volumes/Media Archive-1 failed 65. 12/27/13 10:49:38.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: sleep for 4 seconds and then try again 12/27/13 10:49:41.000 PM kernel[0]: CODE SIGNING: cs_invalid_page(0x1000): p=53662[GoogleSoftwareUp] clearing CS_VALID 12/27/13 10:49:42.102 PM GoogleSoftwareUpdateDaemon[53663]: -[KeystoneDaemon logServiceState] GoogleSoftwareUpdate daemon (1.1.0.3659) vending: com.google.Keystone.Daemon.UpdateEngine: 2 connection(s) com.google.Keystone.Daemon.Administration: 0 connection(s) 12/27/13 10:49:42.113 PM GoogleSoftwareUpdateDaemon[53663]: -[KSUpdateEngine updateProductID:] KSUpdateEngine updating product ID: "com.google.Keystone" 12/27/13 10:49:42.116 PM GoogleSoftwareUpdateDaemon[53663]: -[KSCheckAction performAction] KSCheckAction checking 1 ticket(s). 12/27/13 10:49:42.121 PM GoogleSoftwareUpdateDaemon[53663]: -[KSUpdateCheckAction performAction] KSUpdateCheckAction starting update check for ticket(s): {( <KSTicket:0x531870 productID=com.google.Keystone version=1.1.0.3659 xc=<KSPathExistenceChecker:0x5302d0 path=/Library/Google/GoogleSoftwareUpdate/GoogleSoftwareUpdate.bundle/> serverType=Omaha url=htt[PeeEs]://tools.google.com/service/update2 creationDate=2012-08-12 14:47:10 > )} Using server: <KSOmahaServer:0x534340 engine=<KSDaemonUpdateEngine:0x52e530> params={ EngineVersion = "1.1.0.3659"; ActivesInfo = { "com.google.talkplugin" = { LastRollCallPingDate = 2013-10-06 07:00:00 +0000; }; "com.google.Keystone" = { LastRollCallPingDate = 2013-10-06 07:00:00 +0000; LastActivePingDate = 2013-10-06 07:00:00 +0000; LastActiveDate = 2013-12-28 03:49:42 +0000; }; "com.google.picasa" = { LastActiveDate = 2012-08-29 10:15:42 +0000; }; }; UserInitiated = 0; IsSystem = 1; OmahaOSVersion = "10.8.5_i486"; Identity = KeystoneDaemon; AllowedSubdomains = ( ".omaha.sandbox.google.com", ".tools.google.com", ".www.google.com", ".corp.google.com" ); } > 12/27/13 10:49:42.130 PM GoogleSoftwareUpdateDaemon[53663]: -[KSUpdateCheckAction performAction] KSUpdateCheckAction running KSServerUpdateRequest: <KSOmahaServerUpdateRequest:0x1a31a90 server=<KSOmahaServer:0x534340> url="htt[PeeEs]://tools.google.com/service/update2" runningFetchers=0 tickets=1 activeTickets=1 rollCallTickets=1 body= <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <o:gupdate xmlns:o="htt[Pee]://www.google.com/update2/request" protocol="2.0" version="KeystoneDaemon-1.1.0.3659" ismachine="1"> <o:os platform="mac" version="MacOSX" sp="10.8.5_i486"></o:os> <o:app appid="com.google.Keystone" version="1.1.0.3659" lang="en-us" installage="502" brand="GGLG"> <o:ping r="82" a="82"></o:ping> <o:updatecheck></o:updatecheck> </o:app> </o:gupdate> > 12/27/13 10:49:42.291 PM GoogleSoftwareUpdateDaemon[53663]: -[KSOutOfProcessFetcher(PrivateMethods) helperDidTerminate:] The Internet connection appears to be offline. [NSURLErrorDomain:-1009] 12/27/13 10:49:42.291 PM GoogleSoftwareUpdateDaemon[53663]: -[KSServerUpdateRequest(PrivateMethods) fetcher:failedWithError:] KSServerUpdateRequest fetch failed. (productIDs: com.google.Keystone) [com.google.UpdateEngine.CoreErrorDomain:702 - 'htt[PeeEs]://tools.google.com/service/update2'] (The Internet connection appears to be offline. [NSURLErrorDomain:-1009]) 12/27/13 10:49:42.292 PM GoogleSoftwareUpdateDaemon[53663]: -[KSUpdateCheckAction(PrivateMethods) finishAction] KSUpdateCheckAction found updates: {( )} 12/27/13 10:49:42.295 PM GoogleSoftwareUpdateDaemon[53663]: -[KSPrefetchAction performAction] KSPrefetchAction no updates to prefetch. 12/27/13 10:49:42.295 PM GoogleSoftwareUpdateDaemon[53663]: -[KSMultiUpdateAction performAction] KSSilentUpdateAction had no updates to apply. 12/27/13 10:49:42.296 PM GoogleSoftwareUpdateDaemon[53663]: -[KSMultiUpdateAction performAction] KSPromptAction had no updates to apply. 12/27/13 10:49:42.299 PM GoogleSoftwareUpdateDaemon[53663]: -[KSUpdateEngine(PrivateMethods) updateFinish] KSUpdateEngine update processing complete. 12/27/13 10:49:42.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: connect to the server /Volumes/Media Archive-1 12/27/13 10:49:42.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: connect on /Volumes/Media Archive-1 failed 65. 12/27/13 10:49:42.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: sleep for 8 seconds and then try again 12/27/13 10:49:43.152 PM GoogleSoftwareUpdateDaemon[53663]: -[KSUpdateEngine updateAllProducts] KSUpdateEngine updating all installed products. 12/27/13 10:49:43.153 PM GoogleSoftwareUpdateDaemon[53663]: -[KSCheckAction performAction] KSCheckAction checking 2 ticket(s). 12/27/13 10:49:43.158 PM GoogleSoftwareUpdateDaemon[53663]: -[KSUpdateCheckAction performAction] KSUpdateCheckAction starting update check for ticket(s): {( <KSTicket:0x18367a0 productID=com.google.Keystone version=1.1.0.3659 xc=<KSPathExistenceChecker:0x1837e10 path=/Library/Google/GoogleSoftwareUpdate/GoogleSoftwareUpdate.bundle/> serverType=Omaha url=htt[PeeEs]://tools.google.com/service/update2 creationDate=2012-08-12 14:47:10 >, <KSTicket:0x1834750 productID=com.google.talkplugin version=4.7.0.15362 xc=<KSPathExistenceChecker:0x1833890 path=/Library/Application Support/Google/GoogleTalkPlugin.app> serverType=Omaha url=htt[PeeEs]://tools.google.com/service/update2 creationDate=2012-08-12 14:47:10 > )} Using server: <KSOmahaServer:0x52e930 engine=<KSDaemonUpdateEngine:0x52e530> params={ EngineVersion = "1.1.0.3659"; ActivesInfo = { "com.google.talkplugin" = { LastRollCallPingDate = 2013-10-06 07:00:00 +0000; }; "com.google.Keystone" = { LastRollCallPingDate = 2013-10-06 07:00:00 +0000; LastActivePingDate = 2013-10-06 07:00:00 +0000; LastActiveDate = 2013-12-28 03:49:42 +0000; }; "com.google.picasa" = { LastActiveDate = 2012-08-29 10:15:42 +0000; }; }; UserInitiated = 0; IsSystem = 1; OmahaOSVersion = "10.8.5_i486"; Identity = KeystoneDaemon; AllowedSubdomains = ( ".omaha.sandbox.google.com", ".tools.google.com", ".www.google.com", ".corp.google.com" ); } > 12/27/13 10:49:43.159 PM GoogleSoftwareUpdateDaemon[53663]: -[KSUpdateCheckAction performAction] KSUpdateCheckAction running KSServerUpdateRequest: <KSOmahaServerUpdateRequest:0x53a210 server=<KSOmahaServer:0x52e930> url="htt[PeeEs]://tools.google.com/service/update2" runningFetchers=0 tickets=2 activeTickets=1 rollCallTickets=2 body= <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <o:gupdate xmlns:o="htt[Pee]://www.google.com/update2/request" protocol="2.0" version="KeystoneDaemon-1.1.0.3659" ismachine="1"> <o:os platform="mac" version="MacOSX" sp="10.8.5_i486"></o:os> <o:app appid="com.google.Keystone" version="1.1.0.3659" lang="en-us" installage="502" brand="GGLG"> <o:ping r="82" a="82"></o:ping> <o:updatecheck></o:updatecheck> </o:app> <o:app appid="com.google.talkplugin" version="4.7.0.15362" lang="en-us" installage="502" brand="GGLG"> <o:ping r="82"></o:ping> <o:updatecheck></o:updatecheck> </o:app> </o:gupdate> > 12/27/13 10:49:43.243 PM GoogleSoftwareUpdateDaemon[53663]: -[KSOutOfProcessFetcher(PrivateMethods) helperDidTerminate:] The Internet connection appears to be offline. [NSURLErrorDomain:-1009] 12/27/13 10:49:43.243 PM GoogleSoftwareUpdateDaemon[53663]: -[KSServerUpdateRequest(PrivateMethods) fetcher:failedWithError:] KSServerUpdateRequest fetch failed. (productIDs: com.google.Keystone, ... (2)) [com.google.UpdateEngine.CoreErrorDomain:702 - 'htt[PeeEs]://tools.google.com/service/update2'] (The Internet connection appears to be offline. [NSURLErrorDomain:-1009]) 12/27/13 10:49:43.244 PM GoogleSoftwareUpdateDaemon[53663]: -[KSUpdateCheckAction(PrivateMethods) finishAction] KSUpdateCheckAction found updates: {( )} 12/27/13 10:49:43.247 PM GoogleSoftwareUpdateDaemon[53663]: -[KSPrefetchAction performAction] KSPrefetchAction no updates to prefetch. 12/27/13 10:49:43.248 PM GoogleSoftwareUpdateDaemon[53663]: -[KSMultiUpdateAction performAction] KSSilentUpdateAction had no updates to apply. 12/27/13 10:49:43.248 PM GoogleSoftwareUpdateDaemon[53663]: -[KSMultiUpdateAction performAction] KSPromptAction had no updates to apply. 12/27/13 10:49:43.250 PM GoogleSoftwareUpdateDaemon[53663]: -[KSUpdateEngine(PrivateMethods) updateFinish] KSUpdateEngine update processing complete. 12/27/13 10:49:45.570 PM GoogleSoftwareUpdateDaemon[53663]: -[KeystoneDaemon logServiceState] GoogleSoftwareUpdate daemon (1.1.0.3659) vending: com.google.Keystone.Daemon.UpdateEngine: 1 connection(s) com.google.Keystone.Daemon.Administration: 0 connection(s) 12/27/13 10:49:50.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: connect to the server /Volumes/Media Archive-1 12/27/13 10:49:50.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: connect on /Volumes/Media Archive-1 failed 65. 12/27/13 10:49:50.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: sleep for 10 seconds and then try again 12/27/13 10:49:53.828 PM KernelEventAgent[57]: tid 00000000 unmounting 1 filesystems 12/27/13 10:49:53.000 PM kernel[0]: AFP_VFS afpfs_unmount: /Volumes/Media Archive-1, flags 524288, pid 57 12/27/13 10:49:54.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: get the reconnect token 12/27/13 10:49:54.000 PM kernel[0]: AFP_VFS afpfs_DoReconnect: GetReconnectToken failed 32 /Volumes/Media Archive-1 12/27/13 10:49:54.000 PM kernel[0]: AFP_VFS afpfs_unmount : afpfs_DoReconnect sent signal for unmount to proceed 12/27/13 10:50:12.104 PM GoogleSoftwareUpdateDaemon[53663]: -[KeystoneDaemon main] GoogleSoftwareUpdateDaemon inactive, shutdown. 12/27/13 10:50:29.396 PM Dock[93157]: no information back from LS about running process

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• Ninject Kernel Scope

  - by user326502

  I'm new to Ninject, and I was wondering if the scope of the kernel should be 1 per application. So should I treat the kernel as a singleton? Thanks.

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• Limit on number of kernel arguments in OpenCL

  - by Rakesh K

  Hi, I wanted to know if there is any limit on the number of arguments that are set to kernel function in OpenCL. I am getting the error as INVALID_ARG_INDEX while setting arguments. I am setting 9 arguments in the kernel function. Please help me in this regard. Thanks, Rakesh.

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• linux kernel booting from my bootloader

  - by sp3tsnaz

  hi , i wish to load linux using my own bootloader .. preliminary research and google told me that i ll have to use start_kerne() function .. i want to ask how can i call start_kernel() from assembly .. i have already formatted my usb into ext3 and pasted the compiled kernel there .. now how can i start the linux kernel ? any help is welcome // Thankyou in advance Mohsin .

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• difference between kernel vs user mode progamming

  - by mousey

  Hi, I would like to know how kernel programmer thinks about memory vs user mode programmer. I would also like to know few more differences between kernel programming and user mode programming. Thanks & Regards, Mousey.

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• possible SYN flooding on port 80. Sending cookies

  - by Sparsh Gupta

  I recently had a server downtime. I looked everywhere and the only thing I found in my log files is: Feb 17 18:58:04 localhost kernel: possible SYN flooding on port 80. Sending cookies. Feb 17 18:59:33 localhost kernel: possible SYN flooding on port 80. Sending cookies. Can someone give me more information about it. WHat is it, How can I debug the cause and how can I fix the same. I also posted ipconntrack suddenly became toooo large which has another data point I found unusual, wondering if the two things is connected as they occured exactly at the same time but at different servers. One at reverse proxy and other at actual backend Varnish server) Thanks

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• Debian on Hyper-V

  - by Tobia

  I installed Debian with kernel 2.6.32-5-686 on a Hyper-V virtual machine. I had to add a legacy network card. I follow this tutorial http://www.microsofttranslator.com/bv.aspx?ref=Internal&from=ru&to=en&a=http://blogs.technet.com/b/abeshkov/archive/2011/03/17/hyperv_5f00_debian.aspx to add Hyper-V driver but when I reboot with the new kernel it crash during bootup. Is there any other way to load hyper-v drivers? I really need to change that legacy network card because my debian machine is going to be used as proxy. Thank you.

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• High shmmax value in Redhat 6.3

  - by xpapad

  We are using Redhat 6.3 with 30G RAM to host our Postgres server. The (default) shmmax value is 68,719,476,736 In some forums I have read that having an shmmax value larger than the RAM causes extensive paging, but in the Redhat forums it warns against changing a kernel parameter that is already configured to a value larger than the minimum requirements for an environment. In ServerFault I've read that this probably has no impact. So is there any impact of having shmmax value RAM in a DB server, or the kernel understands this and handles it appropriately? Thanks

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• Linux Kernel Packet Forwarding Performance

  - by Bob Somers

  I've been using a Linux box as a router for some time now. Nothing too fancy, just enabling forwarding in the kernel, turning on masquerading, and setting up iptables to poke a few holes in the firewall. Recently a friend of mine pointed out a performance problem. Single TCP connections seem to experience very poor performance. You have to open multiple parallel TCP connections to get decent speed. For example, I have a 10 Mbit internet connection. When I download a file from a known-fast source using something like the DownThemAll! extension for Firefox (which opens multiple parallel TCP connections) I can get it to max out my downstream bandwidth at around 1 MB/s. However, when I download the same file using the built-in download manager in Firefox (uses only a single TCP connection) it starts fast and the speed tanks until it tops out around 100 KB/s to 350 KB/s. I've checked the internal network and it doesn't seem to have any problems. Everything goes through a 100 Mbit switch. I've also run iperf both internally (from the router to my desktop) and externally (from my desktop to a Linux box I own out on the net) and haven't seen any problems. It tops out around 1 MB/s like it should. Speedtest.net also reports 10 Mbits speeds. The load on the Linux machine is around 0.00, 0.00, 0.00 all the time, and it's got plenty of free RAM. It's an older laptop with a Pentium M 1.6 GHz processor and 1 GB of RAM. The internal network is connected to the built in Intel NIC and the cable modem is connected to a Netgear FA511 32-bit PCMCIA network card. I think the problem is with the packet forwarding in the router, but I honestly am not sure where the problem could be. Is there anything that would substantially slow down a single TCP stream?

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• RHEL 5.2 installing on ProLiant BL460c - hangs at 'now booting the kernel'

  - by Dr Rocket Mr Socket

  As the title states, I have a problem. This server and the installation disc are also on the other side of the world to me so... So far, I have tried to start the install with the parameters: linux text noapic noacpi no=apic no=acpi which results in the same hang. I have also disabled a PCI ethernet adapter, I am uneasy about disabling the onboard ethernet adapter I do not know if ILO uses this. Anyone have any advice? Much appreciated. EDIT: full output after trying to begin the installation. boot: linux text Loading initrd.img.................. Loading vmlinuz....... Uncompressing Linux...done. Now booting the kernel stays on this for hours EDIT2: adding the 'mem=40960M' (server has 40 gigs of ram) parameter allows it to proceed but the following output directly after 'Now booting the kernal' Memory: sized by int13 0e801h initrd extends beyond end of memory (0x00ef2090 > 0x00000000) disabling initrd Console: 16 point font, 400 scans Console: colour VGA+ 80x25, 1 virtual console (max 63) pcibios_init : BIOS32 Service Directory Structure at 0x000ffee0 pcibios_init : BIOS32 Service Directory entry at 0xf0000

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• LightDM will not start after stopping it

  - by Sweeters

  I am running Ubuntu 11.10 "Oneiric Ocelot", and in trying to install the nvidia CUDA developer drivers I switched to a virtual terminal (Ctrl-Alt-F5) and stopped lightdm (installation required that no X server instance be running) through sudo service lightdm stop. Re-starting lightdm with sudo service lightdm start did not work: A couple of * Starting [...] lines where displayed, but the process hanged. (I do not remember at which point, but I think it was * Starting System V runlevel compatibility. I manually rebooted my laptop, and ever since booting seems to hang, usually around the * Starting anac(h)ronistic cron [OK] log line (not consistently at that point, though). From that point on, I seem to be able to interact with my system only through a tty session (Ctrl-Alt-F1). I've tried purging and reinstalling both lightdm and gdm, as well as selecting both as the default display managers (through sudo dpkg-reconfigure [lightdm / gdm] or by manually editing /etc/X11/default-display-manager) through both apt-get and aptitude (that shouldn't make a difference anyway) after updating the packages, but the problem persists. Some of the responses I'm getting are the following: After running sudo dpkg-reconfigure lightdm (but not ... gdm) I get the following message: dpkg-maintscript-helper:warning: environment variable DPKG_MATINSCRIPT_NAME missing dpkg-maintscript-helper:warning: environment variable DPKG_MATINSCRIPT_PACKAGE missing After trying sudo service lightdm start or sudo start lightdm I get to see the boot loading screen again but nothing changes. If I go back to the tty shell I see lightdm start/running, process <num> but ps -e | grep lightdm gives no output. After trying sudo service gdm start or sudo starg gdm I get the gdm start/running, process <num> message, and gdm-binary is supposedly an active process, but all that happens is that the screen blinks a couple of times and nothing else. Other candidate solutions that I'd found on the web included running startx but when I try that I get an error output [...] Fatal server error: no screens found [...]. Moreover, I made sure that lightdm-gtk-greeter is installed but that did not help either. Please excuse my not including complete outputs/logs; I am writing this post from another computer and it's hard to manually copy the complete logs. Also, I've seen several posts that had to do with similar problems, but either there was no fix, or the one suggested did not work for me. In closing: Please help! I very much hope to avoid re-installing Ubuntu from scratch! :) Alex @mosi I did not manage to fix the NVIDIA kernel driver as per your instructions. I should perhaps mention that I'm on a Dell XPS15 laptop with an NVIDIA Optimus graphics card, and that I have bumblebee installed (which installs nvidia drivers during its installation, I believe). Issuing the mentioned commands I get the following: ~$uname -r 3.0.0-12-generic ~$lsmod | grep -i nvidia nvidia 11713772 0 ~$dmesg | grep -i nvidia [ 8.980041] nvidia: module license 'NVIDIA' taints kernel. [ 9.354860] nvidia 0000:01:00.0: power state changed by ACPI to D0 [ 9.354864] nvidia 0000:01:00.0: power state changed by ACPI to D0 [ 9.354868] nvidia 0000:01:00.0: enabling device (0006 -> 0007) [ 9.354873] nvidia 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 9.354879] nvidia 0000:01:00.0: setting latency timer to 64 [ 9.355052] NVRM: loading NVIDIA UNIX x86_64 Kernel Module 280.13 Wed Jul 27 16:53:56 PDT 2011 Also, running aptitude search nvidia gives me the following: p nvidia-173 - NVIDIA binary Xorg driver, kernel module a p nvidia-173-dev - NVIDIA binary Xorg driver development file p nvidia-173-updates - NVIDIA binary Xorg driver, kernel module a p nvidia-173-updates-dev - NVIDIA binary Xorg driver development file p nvidia-96 - NVIDIA binary Xorg driver, kernel module a p nvidia-96-dev - NVIDIA binary Xorg driver development file p nvidia-96-updates - NVIDIA binary Xorg driver, kernel module a p nvidia-96-updates-dev - NVIDIA binary Xorg driver development file p nvidia-cg-toolkit - Cg Toolkit - GPU Shader Authoring Language p nvidia-common - Find obsolete NVIDIA drivers i nvidia-current - NVIDIA binary Xorg driver, kernel module a p nvidia-current-dev - NVIDIA binary Xorg driver development file c nvidia-current-updates - NVIDIA binary Xorg driver, kernel module a p nvidia-current-updates-dev - NVIDIA binary Xorg driver development file i nvidia-settings - Tool of configuring the NVIDIA graphics dr p nvidia-settings-updates - Tool of configuring the NVIDIA graphics dr v nvidia-va-driver - v nvidia-va-driver - I've tried manually installing (sudo aptitude install <package>) packages nvidia-common and nvidia-settings-updates but to no avail. For example, sudo aptitude install nvidia-settings-updates returns the following log: Reading package lists... Building dependency tree... Reading state information... Reading extended state information... Initializing package states... Writing extended state information... No packages will be installed, upgraded, or removed. 0 packages upgraded, 0 newly installed, 0 to remove and 83 not upgraded. Need to get 0 B of archives. After unpacking 0 B will be used. Writing extended state information... Reading package lists... Building dependency tree... Reading state information... Reading extended state information... Initializing package states... Writing extended state information... The same happens with the Linux headers (i.e. I cannot seem to be able to install linux-headers-3.0.0-12-generic). The output of aptitude search linux-headers is as follows: v linux-headers - v linux-headers - v linux-headers-2.6 - i linux-headers-2.6.38-11 - Header files related to Linux kernel versi i linux-headers-2.6.38-11-generic - Linux kernel headers for version 2.6.38 on i A linux-headers-2.6.38-8 - Header files related to Linux kernel versi i A linux-headers-2.6.38-8-generic - Linux kernel headers for version 2.6.38 on v linux-headers-3 - v linux-headers-3.0 - v linux-headers-3.0 - i A linux-headers-3.0.0-12 - Header files related to Linux kernel versi p linux-headers-3.0.0-12-generic - Linux kernel headers for version 3.0.0 on p linux-headers-3.0.0-12-generic- - Linux kernel headers for version 3.0.0 on p linux-headers-3.0.0-12-server - Linux kernel headers for version 3.0.0 on p linux-headers-3.0.0-12-virtual - Linux kernel headers for version 3.0.0 on p linux-headers-generic - Generic Linux kernel headers p linux-headers-generic-pae - Generic Linux kernel headers v linux-headers-lbm - v linux-headers-lbm - v linux-headers-lbm-2.6 - v linux-headers-lbm-2.6 - p linux-headers-lbm-3.0.0-12-gene - Header files related to linux-backports-mo p linux-headers-lbm-3.0.0-12-gene - Header files related to linux-backports-mo p linux-headers-lbm-3.0.0-12-serv - Header files related to linux-backports-mo p linux-headers-server - Linux kernel headers on Server Equipment. p linux-headers-virtual - Linux kernel headers for virtual machines @heartsmagic I did try purging and reinstalling any nvidia driver packages, but it did not seem to make a difference, My xorg.conf file contains the following: # nvidia-xconfig: X configuration file generated by nvidia-xconfig # nvidia-xconfig: version 280.13 ([email protected]) Wed Jul 27 17:15:58 PDT 2011 Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" 0 0 InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" EndSection Section "Files" EndSection Section "InputDevice" # generated from default Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" Identifier "Monitor0" VendorName "Unknown" ModelName "Unknown" HorizSync 28.0 - 33.0 VertRefresh 43.0 - 72.0 Option "DPMS" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" EndSection Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 SubSection "Display" Depth 24 EndSubSection EndSection

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• I have UFW block messages from local network machines, how can I analyse if they are malicious?

  - by Trygve

  I'm getting a lot of messages in my UFW log, and I'm trying to figure out if these are malicious or just normal. A UDP broadcast is coming from a windows laptop x.x.x.191, and some from our synology disks x.x.x.{6,8,10,11}. I have not figured out which macine 114 is yet. I would appreciate some advice in how to read the log, and get the most I can out of these calls. Oct 18 17:03:34 <myusername> kernel: [ 4034.755221] [UFW BLOCK] IN=eth0 OUT= MAC=f0:de:f1:71:c3:2e:00:11:32:06:e8:19:08:00 SRC=x.x.x.6 DST=x.x.x.169 LEN=364 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=1900 DPT=47978 LEN=344 Oct 18 17:03:34 <myusername> kernel: [ 4034.755292] [UFW BLOCK] IN=eth0 OUT= MAC=f0:de:f1:71:c3:2e:00:11:32:1b:e8:8f:08:00 SRC=x.x.x.10 DST=x.x.x.169 LEN=366 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=1900 DPT=47978 LEN=346 Oct 18 17:03:34 <myusername> kernel: [ 4034.756444] [UFW BLOCK] IN=eth0 OUT= MAC=f0:de:f1:71:c3:2e:c0:c1:c0:52:18:ea:08:00 SRC=x.x.x.8 DST=x.x.x.169 LEN=294 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=1900 DPT=47978 LEN=274 Oct 18 17:03:34 <myusername> kernel: [ 4034.756613] [UFW BLOCK] IN=eth0 OUT= MAC=f0:de:f1:71:c3:2e:c0:c1:c0:52:18:ea:08:00 SRC=x.x.x.8 DST=x.x.x.169 LEN=306 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=1900 DPT=47978 LEN=286 Oct 18 17:03:34 <myusername> kernel: [ 4034.760416] [UFW BLOCK] IN=eth0 OUT= MAC=f0:de:f1:71:c3:2e:00:11:32:1e:6a:33:08:00 SRC=x.x.x.11 DST=x.x.x.169 LEN=366 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=1900 DPT=47978 LEN=346 Oct 18 17:03:36 <myusername> kernel: [ 4036.215134] [UFW BLOCK] IN=eth0 OUT= MAC=f0:de:f1:71:c3:2e:00:22:19:de:80:a4:08:00 SRC=x.x.x.191 DST=x.x.x.169 LEN=424 TOS=0x00 PREC=0x00 TTL=128 ID=11155 PROTO=UDP SPT=1900 DPT=47978 LEN=404 Oct 18 17:04:23 <myusername> kernel: [ 4083.853710] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:7f:ff:fa:00:22:19:de:80:a4:08:00 SRC=x.x.x.191 DST=239.255.255.250 LEN=652 TOS=0x00 PREC=0x00 TTL=1 ID=11247 PROTO=UDP SPT=58930 DPT=3702 LEN=632 Oct 18 17:04:24 <myusername> kernel: [ 4084.063153] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:7f:ff:fa:00:22:19:de:80:a4:08:00 SRC=x.x.x.191 DST=239.255.255.250 LEN=652 TOS=0x00 PREC=0x00 TTL=1 ID=11299 PROTO=UDP SPT=58930 DPT=3702 LEN=632 Oct 18 17:07:02 <myusername> kernel: [ 4242.153947] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:7f:ff:fa:00:22:19:de:80:a4:08:00 SRC=x.x.x.191 DST=239.255.255.250 LEN=680 TOS=0x00 PREC=0x00 TTL=1 ID=18702 PROTO=UDP SPT=58930 DPT=3702 LEN=660 Oct 18 17:07:02 <myusername> kernel: [ 4242.275788] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:7f:ff:fa:00:22:19:de:80:a4:08:00 SRC=x.x.x.191 DST=239.255.255.250 LEN=680 TOS=0x00 PREC=0x00 TTL=1 ID=18703 PROTO=UDP SPT=58930 DPT=3702 LEN=660 Oct 18 17:12:29 <myusername> kernel: [ 4569.073815] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:7f:ff:fa:00:22:19:de:80:a4:08:00 SRC=x.x.x.191 DST=239.255.255.250 LEN=680 TOS=0x00 PREC=0x00 TTL=1 ID=30102 PROTO=UDP SPT=58930 DPT=3702 LEN=660 Oct 18 17:12:29 <myusername> kernel: [ 4569.242740] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:7f:ff:fa:00:22:19:de:80:a4:08:00 SRC=x.x.x.191 DST=239.255.255.250 LEN=680 TOS=0x00 PREC=0x00 TTL=1 ID=30103 PROTO=UDP SPT=58930 DPT=3702 LEN=660 Oct 18 17:17:02 <myusername> kernel: [ 4841.440729] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:7f:ff:fa:00:22:19:de:80:a4:08:00 SRC=x.x.x.191 DST=239.255.255.250 LEN=680 TOS=0x00 PREC=0x00 TTL=1 ID=9195 PROTO=UDP SPT=58930 DPT=3702 LEN=660 Oct 18 17:17:02 <myusername> kernel: [ 4841.553211] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:7f:ff:fa:00:22:19:de:80:a4:08:00 SRC=x.x.x.191 DST=239.255.255.250 LEN=680 TOS=0x00 PREC=0x00 TTL=1 ID=9196 PROTO=UDP SPT=58930 DPT=3702 LEN=660 Oct 18 17:19:10 <myusername> kernel: [ 4969.294709] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:7f:ff:fa:00:25:36:26:02:86:08:00 SRC=x.x.x.114 DST=239.255.255.250 LEN=923 TOS=0x00 PREC=0x00 TTL=1 ID=27103 PROTO=UDP SPT=3702 DPT=3702 LEN=903 Oct 18 17:19:10 <myusername> kernel: [ 4969.314553] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:7f:ff:fa:00:25:36:26:02:86:08:00 SRC=x.x.x.114 DST=239.255.255.250 LEN=923 TOS=0x00 PREC=0x00 TTL=1 ID=27104 PROTO=UDP SPT=3702 DPT=3702 LEN=903 Oct 18 17:33:34 <myusername> kernel: [ 5832.431610] [UFW BLOCK] IN=eth0 OUT= MAC=f0:de:f1:71:c3:2e:00:11:32:1b:e8:8f:08:00 SRC=x.x.x.10 DST=x.x.x.169 LEN=366 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=1900 DPT=55281 LEN=346 Oct 18 17:33:34 <myusername> kernel: [ 5832.431659] [UFW BLOCK] IN=eth0 OUT= MAC=f0:de:f1:71:c3:2e:00:11:32:06:e8:19:08:00 SRC=x.x.x.6 DST=x.x.x.169 LEN=364 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=1900 DPT=55281 LEN=344 Oct 18 17:33:34 <myusername> kernel: [ 5832.431865] [UFW BLOCK] IN=eth0 OUT= MAC=f0:de:f1:71:c3:2e:00:11:32:1e:6a:33:08:00 SRC=x.x.x.11 DST=x.x.x.169 LEN=366 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=1900 DPT=55281 LEN=346 Oct 18 17:33:34 <myusername> kernel: [ 5832.433024] [UFW BLOCK] IN=eth0 OUT= MAC=f0:de:f1:71:c3:2e:c0:c1:c0:52:18:ea:08:00 SRC=x.x.x.8 DST=x.x.x.169 LEN=294 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=1900 DPT=55281 LEN=274 Oct 18 17:33:34 <myusername> kernel: [ 5832.433224] [UFW BLOCK] IN=eth0 OUT= MAC=f0:de:f1:71:c3:2e:c0:c1:c0:52:18:ea:08:00 SRC=x.x.x.8 DST=x.x.x.169 LEN=306 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=1900 DPT=55281 LEN=286 Oct 18 17:33:37 <myusername> kernel: [ 5834.914484] [UFW BLOCK] IN=eth0 OUT= MAC=f0:de:f1:71:c3:2e:00:22:19:de:80:a4:08:00 SRC=x.x.x.191 DST=x.x.x.169 LEN=424 TOS=0x00 PREC=0x00 TTL=128 ID=10075 PROTO=UDP SPT=1900 DPT=55281 LEN=404

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• PC to USB transfer slow

  - by Vipin Ms

  I'm having trouble with USB transfer,not with external hard disk. Transfer starts with like, for the transfer of 700MB file it starts with 30mb/s and towards the end it stops at 0s and stays put for like 3-4 mins to transfer the last bit. I have tried different USB devices, but no luck. Is it a bug? Another important point is, in Kubuntu there is no such issue. So is it something related to Gnome? I'm using Ubuntu 11.10 64bit. Somebody please help, it's really annoying. Here are the details. PC all of my drives are in ext4. USB I tried ext3,ntfs and fat32. All having the same problem. Here are my USB controllers details: root@LAB:~# lspci|grep USB 00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03) 00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03) 00:1a.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03) 00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03) 00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03) 00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03) 00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03) 00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03) Here is an example of one transfer. I connected one of my 4GB usb device. Nov 24 12:01:25 LAB kernel: [ 1175.082175] userif-2: sent link up event. Nov 24 12:01:25 LAB kernel: [ 1695.684158] usb 2-2: new high speed USB device number 3 using ehci_hcd Nov 24 12:01:25 LAB mtp-probe: checking bus 2, device 3: "/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-2" Nov 24 12:01:26 LAB mtp-probe: bus: 2, device: 3 was not an MTP device Nov 24 12:01:26 LAB kernel: [ 1696.132680] usbcore: registered new interface driver uas Nov 24 12:01:26 LAB kernel: [ 1696.142528] Initializing USB Mass Storage driver... Nov 24 12:01:26 LAB kernel: [ 1696.142919] scsi4 : usb-storage 2-2:1.0 Nov 24 12:01:26 LAB kernel: [ 1696.143146] usbcore: registered new interface driver usb-storage Nov 24 12:01:26 LAB kernel: [ 1696.143150] USB Mass Storage support registered. Nov 24 12:01:27 LAB kernel: [ 1697.141657] scsi 4:0:0:0: Direct-Access SanDisk U3 Cruzer Micro 8.02 PQ: 0 ANSI: 0 CCS Nov 24 12:01:27 LAB kernel: [ 1697.168827] sd 4:0:0:0: Attached scsi generic sg2 type 0 Nov 24 12:01:27 LAB kernel: [ 1697.169262] sd 4:0:0:0: [sdb] 7856127 512-byte logical blocks: (4.02 GB/3.74 GiB) Nov 24 12:01:27 LAB kernel: [ 1697.169762] sd 4:0:0:0: [sdb] Write Protect is off Nov 24 12:01:27 LAB kernel: [ 1697.169767] sd 4:0:0:0: [sdb] Mode Sense: 45 00 00 08 Nov 24 12:01:27 LAB kernel: [ 1697.171386] sd 4:0:0:0: [sdb] No Caching mode page present Nov 24 12:01:27 LAB kernel: [ 1697.171391] sd 4:0:0:0: [sdb] Assuming drive cache: write through Nov 24 12:01:27 LAB kernel: [ 1697.173503] sd 4:0:0:0: [sdb] No Caching mode page present Nov 24 12:01:27 LAB kernel: [ 1697.173510] sd 4:0:0:0: [sdb] Assuming drive cache: write through Nov 24 12:01:27 LAB kernel: [ 1697.175337] sdb: sdb1 After that I initiated one transfer. lsof -p 3575|tail -2 mv 3575 root 3r REG 8,8 1719599104 4325379 /media/Misc/The Tree of Life (2011) DVDRip XviD-MAXSPEED/The Tree of Life (2011) DVDRip XviD-MAXSPEED www.torentz.3xforum.ro.avi mv 3575 root 4w REG 8,17 1046347776 15 /media/SREE/The Tree of Life (2011) DVDRip XviD-MAXSPEED/The Tree of Life (2011) DVDRip XviD-MAXSPEED www.torentz.3xforum.ro.avi Here are the total time spent on that transfer. root@LAB:/media/SREE# time mv /media/Misc/The\ Tree\ of\ Life\ \(2011\)\ DVDRip\ XviD-MAXSPEED/ /media/SREE/ real 11m49.334s user 0m0.008s sys 0m5.260s root@LAB:/media/SREE# df -T|tail -2 /dev/sdb1 vfat 3918344 1679308 2239036 43% /media/SREE /dev/sda8 ext4 110110576 60096904 50013672 55% /media/Misc Do you think this is normal?? Approximately 12 minutes for 1.6Gb transfer? Thanks.

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• Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) after apt-get upgrade

  - by Edward

  I'm using Ubuntu 9.1 server edition, I get this error during boot time after I ran sudo apt-get upgrade when checking my kernel version, uname -r returns 2.6.31-14-generic but when i run dpkg -l 'linux-image*' | grep ^.i I cannot find 2.6.31-14 (only contains 2.6.32*) Following the solution in the thread: Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) doesn't work for me I'm running the commands inside the Rescue mode by booting from the Ubuntu 9.1 Installation Disc Do I need to update my kernel and run update-initramfs + update-grub again? If so, how can I update the kernel? apt-get install any linux-headers/image cannot change the uname -r value Thanks!

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• Can realtek 8192cu usb wireless card be used in ubuntu 12.04 with kernel 3.2.0?

  - by waterloo2005

  I do like the post RTL8188CUS Wireless USB Dongle doesn't work unless I disable wireless security . But when I plug my 8192cu usb wireless card, my computer screen is off. At that time I even can not use Alt SysRq k or Alt SysRq + reisub. I compile the latest driver of 8192cu on ubuntu 12.04 with kernel 3.2.0-34. In RealTek site, I download 8192cu drive which is for Linux Kernel 2.6.18~2.6.38 and Kernel 3.0.8. But now in Ubuntu12.04 my kernel is 3.2.0-34. Every time I plug the usb 8192cu wireless card my system halts. Now I try to blacklist both the system's rtl8192cu driver and the new 8192cu driver I compile, but the system still halts when I plug the usb driver. What about you ? Thanks!

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• Flush kernel's TCP buffer with `MSG_MORE`-flagged packets

  - by timn

  send()'s man page reveals the MSG_MORE flag which is asserted to act like TCP_CORK. I have a wrapper function around send(): int SocketConnection_Write(SocketConnection *this, void *buf, int len) { errno = 0; int sent = send(this->fd, buf, len, MSG_NOSIGNAL); if (errno == EPIPE || errno == ENOTCONN) { throw(exc, &SocketConnection_NotConnectedException); } else if (errno == ECONNRESET) { throw(exc, &SocketConnection_ConnectionResetException); } else if (sent != len) { throw(exc, &SocketConnection_LengthMismatchException); } return sent; } Assuming I want to use the kernel buffer, I could go with TCP_CORK, enable whenever it is necessary and then disable it to flush the buffer. But on the other hand, thereby the need for an additional system call arises. Thus, the usage of MSG_MORE seems more appropriate to me. I'd simply change the above send() line to: int sent = send(this->fd, buf, len, MSG_NOSIGNAL | MSG_MORE); According to lwm.net, packets will be flushed automatically if they are large enough: If an application sets that option on a socket, the kernel will not send out short packets. Instead, it will wait until enough data has shown up to fill a maximum-size packet, then send it. When TCP_CORK is turned off, any remaining data will go out on the wire. But this section only refers to TCP_CORK. Now, what is the proper way to flush MSG_MORE packets? I can only think of two possibilities: Call send() with an empty buffer and without MSG_MORE being set Re-apply the TCP_CORK option as described on this page Unfortunately the whole topic is very poorly documented and I couldn't find much on the Internet. I am also wondering how to check that everything works as expected? Obviously running the server through strace' is not an option. So the only simplest way would be to usenetcat' and then look at its `strace' output? Or will the kernel handle traffic differently transmitted over a loopback interface?

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• My kernel only works in block (0,0)

  - by ZeroDivide

  I am trying to write a simple matrixMultiplication application that multiplies two square matrices using CUDA. I am having a problem where my kernel is only computing correctly in block (0,0) of the grid. This is my invocation code: dim3 dimBlock(4,4,1); dim3 dimGrid(4,4,1); //Launch the kernel; MatrixMulKernel<<<dimGrid,dimBlock>>>(Md,Nd,Pd,Width); This is my Kernel function __global__ void MatrixMulKernel(int* Md, int* Nd, int* Pd, int Width) { const int tx = threadIdx.x; const int ty = threadIdx.y; const int bx = blockIdx.x; const int by = blockIdx.y; const int row = (by * blockDim.y + ty); const int col = (bx * blockDim.x + tx); //Pvalue stores the Pd element that is computed by the thread int Pvalue = 0; for (int k = 0; k < Width; k++) { Pvalue += Md[row * Width + k] * Nd[k * Width + col]; } __syncthreads(); //Write the matrix to device memory each thread writes one element Pd[row * Width + col] = Pvalue; } I think the problem may have something to do with memory but I'm a bit lost. What should I do to make this code work across several blocks?

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