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Search found 4453 results on 179 pages for 'kernel parametes'.

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• Error while removing the new kernel 2.6.37

  - by Tarek

  Hi! I tried to install the new kernel but something went wrong and I'm trying to remove it now. The error massege is: mhd@Tarek-Laptop:~$ sudo apt-get install -f Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be REMOVED: linux-image-2.6.37-020637-generic 0 upgraded, 0 newly installed, 1 to remove and 9 not upgraded. 1 not fully installed or removed. After this operation, 111MB disk space will be freed. Do you want to continue [Y/n]? y (Reading database ... 188780 files and directories currently installed.) Removing linux-image-2.6.37-020637-generic ... Examining /etc/kernel/postrm.d . run-parts: executing /etc/kernel/postrm.d/initramfs-tools 2.6.37-020637-generic /boot/vmlinuz-2.6.37-020637-generic run-parts: executing /etc/kernel/postrm.d/zz-update-grub 2.6.37-020637-generic /boot/vmlinuz-2.6.37-020637-generic /etc/default/grub: 33: Syntax error: EOF in backquote substitution run-parts: /etc/kernel/postrm.d/zz-update-grub exited with return code 2 Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/info/linux-image-2.6.37-020637-generic.postrm line 328. dpkg: error processing linux-image-2.6.37-020637-generic (--remove): subprocess installed post-removal script returned error exit status 1 Errors were encountered while processing: linux-image-2.6.37-020637-generic E: Sub-process /usr/bin/dpkg returned an error code (1) The previous unsloved error is on this bug. This is my grub configuration file: # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. GRUB_DEFAULT=0 #GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` RUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset video=uvesafb:mode_option=1024x768-24,mtrr=3,scroll=ywrap" video=uvesafb:mode_option=>>1024x768-24<<,mtrr=3,scroll=ywrap" GRUB_CMDLINE_LINUX=" vga=792 splash" # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' GRUB_GFXMODE=1024x768-24 # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID=true # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_LINUX_RECOVERY="true" # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1" thank you for answering.

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• pae kernel required for my cpu [closed]

  - by Edward Meyer

  Possible Duplicate: How can I install 12.04 on a non-PAE CPU? (error “Kernel requires features not present on the CPU: PAE”) Virtualbox install 12.04 guest: “pae not present” After loading ubuntu-12.04.1-desktop-i386.iso into my Oracle VM, the hard drive would not boot because the version for my cpu require the pae kernel. How do I insert the pae kernel or download a copy of ubuntu with the pae kernel?

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• When is a Kernel update due for 11.10?

  - by Mysterio

  Thanks to Phoronix there seems to be a fix for the power regression/overheating bug in the Linux Kernel 3.0.1 bouncing around on the Internet. However this supposed fix which I read has been patched to the Kernel in a testing phase is not newbie-friendly (if you know what I mean). So I am guessing it will be included in the kernel update for 11.10. If it will please when is it due? Linked Question: Kernel patch that solves battery issues when for ubuntu ?

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• Change kernel used by Ubuntu Server on boot

  - by Tim Fountain

  I have a VPS running Ubuntu server 12.04. A while ago, my host installed an alternative kernel (one of Amazon's EC2 kernels) to fix a boot issue I was having. Now, 2 Ubuntu releases later, this kernel (2.6.31-302-ec2) is still being used even though later (3.2.xx) kernels have been installed. How can I make the server use the most recent installed kernel, preferably without just uninstalling the EC2 kernel just in case doing so causes issues?

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• Kernel won't update automatically

  - by Bucic

  My current kernel is 3.2.0-26 (my main computer) while on another of my Ubuntu computers, with which I didn't fiddle with unofficial updates, it's 3.2.0-30. Yet the Update manager on my main computer doesn't show available kernel updates. It shows other updates though. I suspect is due to the fact that in the past I installed multiple mainline kernel versions (not recommended versions), up to 3.5* series. What I'm after: Either: Fix automatic kernel updates. Or: Learn about a way to check for the latest official ubuntu kernel version and get it manually (I know how to install kernels from debs) What I have already tried: Uninstalled unused kernels including "the generic one without a number".

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• Virtualbox Kernel driver not installed

  - by Cyndi

  I tried to use my Virtual Box and this is the error I received - (I just updated to the new Ubuntu also) and I am VERY new at this Linux OS :) Kernel driver not installed (rc=-1908) The VirtualBox Linux kernel driver (vboxdrv) is either not loaded or there is a permission problem with /dev/vboxdrv. Please reinstall the kernel module by executing '/etc/init.d/vboxdrv setup' as root. Users of Ubuntu, Fedora or Mandriva should install the DKMS package first. This package keeps track of Linux kernel changes and recompiles the vboxdrv kernel module if necessary.

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• Linux Kernel logs: "svc: [ip], port=22936: bad direction 150995200, dropping request"

  - by user39478

  I am regularly getting messages of the form Mar 30 22:32:19 spitzer kernel: [1046770.627666] svc: 128.59.149.154, port=22936: bad direction 150995200, dropping request in my Linux 2.6 server logs. From which subsystem do they come from? What do they mean?

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• Changing MAC address on the Fly on old kernel 2.6.x

  - by shaiss

  I'm doing some research on old kernels and running the following on 2.6.7 or 2.6.8 gives a resource busy error. But on 2.6.28 the command works as expected. How would I determine which kernel allowed this command to change the mac address on the fly? ip link set dev addr You can see some screenshots below. Thank you!

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• Oracle Virtualbox on statically compiled kernel

  - by aking1012

  I can't seem to find any documentation on the subject. I'm working on putting together a linux install for a fairly "dirty" environment. Best practice there would be a statically compiled kernel with no module support. I can already do the customizations to strip out unnecessary drivers/etc to get the performance and disable module support. Does anyone have a link or any ideas on how to get the Oracle Virtualbox module (not the OSE one, I need USB passthrough) compiled in?

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• ATI propriatery drivers install latest 12.8, broke my kernel. Stuck on kernel 3.2.0-26

  - by user66987

  I messed up a bit. Hoping some here can help me. I tried to install the newest catalyst 12.8. Sadly, this broke my system. I was stuck in low graphics mode. I finally managed to restore the proprietary drivers, and get into ubuntu again. But now I am stuck on kernel 3.2.0.26. I had installed kernel 3.2.0-30, but the system no longer sees it. I have kernel 3.2.0-29 too, but the system cannot see that as well. In the grub menu. When I use sudo update-grub, they are both listed. Here are the output I get: Searching for GRUB installation directory ... found: /boot/grub Cannot determine root device. Assuming /dev/hda1 This error is probably caused by an invalid /etc/fstab Searching for default file ... found: /boot/grub/default Testing for an existing GRUB menu.lst file ... found: /boot/grub/menu.lst Searching for splash image ... none found, skipping ... Found kernel: /boot/vmlinuz-3.2.0-30-generic Found kernel: /boot/vmlinuz-3.2.0-29-generic Found kernel: /boot/vmlinuz-3.2.0-27-generic Found kernel: /boot/vmlinuz-3.2.0-26-generic Found GRUB 2: /boot/grub/core.img Found kernel: /boot/memtest86+.bin Updating /boot/grub/menu.lst ... done I have searched everywhere to find a solution to my problem, but can't find any solutions. If you need any log outputs to figure out the problem, please let me know which ones. Update: here is the output for grub.cfg # # DO NOT EDIT THIS FILE # # It is automatically generated by grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### if [ -s $prefix/grubenv ]; then set have_grubenv=true load_env fi set default="0" if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function recordfail { set recordfail=1 if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi } function load_video { insmod vbe insmod vga insmod video_bochs insmod video_cirrus } insmod part_msdos insmod ext2 set root='(hd2,msdos1)' search --no-floppy --fs-uuid --set=root 270c7c58-06d8-4e6b-b9bb-8d92f46adc0b if loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=auto load_video insmod gfxterm insmod part_msdos insmod ext2 set root='(hd2,msdos1)' search --no-floppy --fs-uuid --set=root 270c7c58-06d8-4e6b-b9bb-8d92f46adc0b set locale_dir=($root)/boot/grub/locale set lang=nb_NO insmod gettext fi terminal_output gfxterm if [ "${recordfail}" = 1 ]; then set timeout=-1 else set timeout=10 fi ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### set menu_color_normal=white/black set menu_color_highlight=black/light-gray if background_color 44,0,30; then clear fi ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### function gfxmode { set gfxpayload="${1}" if [ "${1}" = "keep" ]; then set vt_handoff=vt.handoff=7 else set vt_handoff= fi } if [ "${recordfail}" != 1 ]; then if [ -e ${prefix}/gfxblacklist.txt ]; then if hwmatch ${prefix}/gfxblacklist.txt 3; then if [ ${match} = 0 ]; then set linux_gfx_mode=keep else set linux_gfx_mode=text fi else set linux_gfx_mode=text fi else set linux_gfx_mode=keep fi else set linux_gfx_mode=text fi export linux_gfx_mode if [ "${linux_gfx_mode}" != "text" ]; then load_video; fi menuentry 'Ubuntu, med Linux 3.2.0-26-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='(hd2,msdos1)' search --no-floppy --fs-uuid --set=root 270c7c58-06d8-4e6b-b9bb-8d92f46adc0b linux /boot/vmlinuz-3.2.0-26-generic root=UUID=270c7c58-06d8-4e6b-b9bb-8d92f46adc0b ro quiet splash $vt_handoff initrd /boot/initrd.img-3.2.0-26-generic } menuentry 'Ubuntu, med Linux 3.2.0-26-generic (gjenopprettelsesmodus)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod gzio insmod part_msdos insmod ext2 set root='(hd2,msdos1)' search --no-floppy --fs-uuid --set=root 270c7c58-06d8-4e6b-b9bb-8d92f46adc0b echo 'Laster Linux 3.2.0-26-generic ...' linux /boot/vmlinuz-3.2.0-26-generic root=UUID=270c7c58-06d8-4e6b-b9bb-8d92f46adc0b ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.2.0-26-generic } submenu "Previous Linux versions" { menuentry 'Ubuntu, med Linux 3.2.0-25-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='(hd2,msdos1)' search --no-floppy --fs-uuid --set=root 270c7c58-06d8-4e6b-b9bb-8d92f46adc0b linux /boot/vmlinuz-3.2.0-25-generic root=UUID=270c7c58-06d8-4e6b-b9bb-8d92f46adc0b ro quiet splash $vt_handoff initrd /boot/initrd.img-3.2.0-25-generic } menuentry 'Ubuntu, med Linux 3.2.0-25-generic (gjenopprettelsesmodus)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod gzio insmod part_msdos insmod ext2 set root='(hd2,msdos1)' search --no-floppy --fs-uuid --set=root 270c7c58-06d8-4e6b-b9bb-8d92f46adc0b echo 'Laster Linux 3.2.0-25-generic ...' linux /boot/vmlinuz-3.2.0-25-generic root=UUID=270c7c58-06d8-4e6b-b9bb-8d92f46adc0b ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.2.0-25-generic } menuentry 'Ubuntu, med Linux 3.2.0-24-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='(hd2,msdos1)' search --no-floppy --fs-uuid --set=root 270c7c58-06d8-4e6b-b9bb-8d92f46adc0b linux /boot/vmlinuz-3.2.0-24-generic root=UUID=270c7c58-06d8-4e6b-b9bb-8d92f46adc0b ro quiet splash $vt_handoff initrd /boot/initrd.img-3.2.0-24-generic } menuentry 'Ubuntu, med Linux 3.2.0-24-generic (gjenopprettelsesmodus)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod gzio insmod part_msdos insmod ext2 set root='(hd2,msdos1)' search --no-floppy --fs-uuid --set=root 270c7c58-06d8-4e6b-b9bb-8d92f46adc0b echo 'Laster Linux 3.2.0-24-generic ...' linux /boot/vmlinuz-3.2.0-24-generic root=UUID=270c7c58-06d8-4e6b-b9bb-8d92f46adc0b ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.2.0-24-generic } menuentry 'Ubuntu, med Linux 3.2.0-23-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='(hd2,msdos1)' search --no-floppy --fs-uuid --set=root 270c7c58-06d8-4e6b-b9bb-8d92f46adc0b linux /boot/vmlinuz-3.2.0-23-generic root=UUID=270c7c58-06d8-4e6b-b9bb-8d92f46adc0b ro quiet splash $vt_handoff initrd /boot/initrd.img-3.2.0-23-generic } menuentry 'Ubuntu, med Linux 3.2.0-23-generic (gjenopprettelsesmodus)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod gzio insmod part_msdos insmod ext2 set root='(hd2,msdos1)' search --no-floppy --fs-uuid --set=root 270c7c58-06d8-4e6b-b9bb-8d92f46adc0b echo 'Laster Linux 3.2.0-23-generic ...' linux /boot/vmlinuz-3.2.0-23-generic root=UUID=270c7c58-06d8-4e6b-b9bb-8d92f46adc0b ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.2.0-23-generic } } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_linux_xen ### ### END /etc/grub.d/20_linux_xen ### ### BEGIN /etc/grub.d/20_memtest86+ ### menuentry "Memory test (memtest86+)" { insmod part_msdos insmod ext2 set root='(hd2,msdos1)' search --no-floppy --fs-uuid --set=root 270c7c58-06d8-4e6b-b9bb-8d92f46adc0b linux16 /boot/memtest86+.bin } menuentry "Memory test (memtest86+, serial console 115200)" { insmod part_msdos insmod ext2 set root='(hd2,msdos1)' search --no-floppy --fs-uuid --set=root 270c7c58-06d8-4e6b-b9bb-8d92f46adc0b linux16 /boot/memtest86+.bin console=ttyS0,115200n8 } ### END /etc/grub.d/20_memtest86+ ### ### BEGIN /etc/grub.d/30_os-prober ### menuentry "Windows 7 (loader) (on /dev/sdb1)" --class windows --class os { insmod part_msdos insmod ntfs set root='(hd1,msdos1)' search --no-floppy --fs-uuid --set=root 448AF3CE8AF3BA8E chainloader +1 } ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. ### END /etc/grub.d/40_custom ### ### BEGIN /etc/grub.d/41_custom ### if [ -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi ### END /etc/grub.d/41_custom ### How can I set kernel 3.2.0.30 as the default kernel? According to this file, kernel 3.2.0-30 does not exist.

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• In Cent os 6.2 can i update Kernel version to 3.4 ? if so how to upgrade kernel?

  - by shiva

  Hi, I have a server with Centos 6.2 with Kernel version 2.6 , but i need to increase my application Performance. The Kernel Version 3.4 has x32abi which can improve the performance so i want to upgrade to 3.4 ? Is it possible? I tried 1) downloading kernel compiling and installing but still i see the same Kernel version.. What went wrong? i followed the process in mentioned in the below link.. http://www.tecmint.com/kernel-3-5-released-install-compile-in-redhat-centos-and-fedora/

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• Error while reomving the new kernel 2.6.37

  - by Tarek

  Hi! I tried to install the new kernel but something went wrong and I'm trying to remove it now. The error massege is: mhd@Tarek-Laptop:~$ sudo apt-get install -f Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be REMOVED: linux-image-2.6.37-020637-generic 0 upgraded, 0 newly installed, 1 to remove and 9 not upgraded. 1 not fully installed or removed. After this operation, 111MB disk space will be freed. Do you want to continue [Y/n]? y (Reading database ... 188780 files and directories currently installed.) Removing linux-image-2.6.37-020637-generic ... Examining /etc/kernel/postrm.d . run-parts: executing /etc/kernel/postrm.d/initramfs-tools 2.6.37-020637-generic /boot/vmlinuz-2.6.37-020637-generic run-parts: executing /etc/kernel/postrm.d/zz-update-grub 2.6.37-020637-generic /boot/vmlinuz-2.6.37-020637-generic /etc/default/grub: 33: Syntax error: EOF in backquote substitution run-parts: /etc/kernel/postrm.d/zz-update-grub exited with return code 2 Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/info/linux-image-2.6.37-020637-generic.postrm line 328. dpkg: error processing linux-image-2.6.37-020637-generic (--remove): subprocess installed post-removal script returned error exit status 1 Errors were encountered while processing: linux-image-2.6.37-020637-generic E: Sub-process /usr/bin/dpkg returned an error code (1) The previous unsloved error is on this bug.

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• dist-upgrade runs and completes but current kernel stays the same

  - by jaguare22

  I think that my system is staying at an older kernel version. It seems to update when I run dist-upgrade but the current kernel version doesn't change. Is it possible the system is set to install new kernel updates but only load an older version at start up? $ uname -a Linux HTPC 3.2.0-32-generic #51-Ubuntu SMP Wed Sep 26 21:32:50 UTC 2012 i686 athlon i386 GNU/Linux $ dpkg --list | grep linux-image ii linux-image-3.2.0-32-generic 3.2.0-32.51 Linux kernel image for version 3.2.0 on 32 bit x86 SMP ii linux-image-3.2.0-32-generic-pae 3.2.0-32.51 Linux kernel image for version 3.2.0 on 32 bit x86 SMP ii linux-image-3.2.0-32-virtual 3.2.0-32.51 Linux kernel image for version 3.2.0 on 32 bit x86 Virtual Guests dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' linux-headers-3.2.0-36 linux-headers-3.2.0-36-generic-pae linux-headers-3.2.0-37 linux-headers-3.2.0-37-generic-pae linux-headers-3.2.0-38 linux-headers-3.2.0-38-generic-pae linux-headers-3.2.0-39 linux-headers-3.2.0-39-generic-pae linux-headers-3.2.0-40 linux-headers-3.2.0-40-generic-pae linux-headers-3.2.0-41 linux-headers-3.2.0-41-generic-pae linux-headers-3.2.0-43 linux-headers-3.2.0-43-generic-pae linux-headers-3.2.0-44 linux-headers-3.2.0-44-generic-pae linux-headers-3.2.0-45 linux-headers-3.2.0-45-generic-pae linux-headers-3.2.0-48 linux-headers-3.2.0-48-generic-pae

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• What can cause kernel out_of_memory error?

  - by nbolton

  I'm running Debian GNU/Linux 5.0 and I'm experiencing intermittent out_of_memory errors coming from the kernel. The server stops responding to all but pings, and I have to reboot the server. # uname -a Linux xxx 2.6.18-164.9.1.el5xen #1 SMP Tue Dec 15 21:31:37 EST 2009 x86_64 GNU/Linux This seems to be the important bit from /var/log/messages Dec 28 20:16:25 slarti kernel: Call Trace: Dec 28 20:16:25 slarti kernel: [<ffffffff802bedff>] out_of_memory+0x8b/0x203 Dec 28 20:16:25 slarti kernel: [<ffffffff8020f825>] __alloc_pages+0x245/0x2ce Dec 28 20:16:25 slarti kernel: [<ffffffff8021377f>] __do_page_cache_readahead+0xc6/0x1ab Dec 28 20:16:25 slarti kernel: [<ffffffff80214015>] filemap_nopage+0x14c/0x360 Dec 28 20:16:25 slarti kernel: [<ffffffff80208ebc>] __handle_mm_fault+0x443/0x1337 Dec 28 20:16:25 slarti kernel: [<ffffffff8026766a>] do_page_fault+0xf7b/0x12e0 Dec 28 20:16:25 slarti kernel: [<ffffffff8026ef17>] monotonic_clock+0x35/0x7b Dec 28 20:16:25 slarti kernel: [<ffffffff80262da3>] thread_return+0x6c/0x113 Dec 28 20:16:25 slarti kernel: [<ffffffff8021afef>] remove_vma+0x4c/0x53 Dec 28 20:16:25 slarti kernel: [<ffffffff80264901>] _spin_lock_irqsave+0x9/0x14 Dec 28 20:16:25 slarti kernel: [<ffffffff8026082b>] error_exit+0x0/0x6e Full snippet here: http://pastebin.com/a7eWf7VZ I thought that perhaps the server was actually running out of memory (it has 1GB physical memory), but my Cacti memory graph looks OK to me... But strangely the load graph goes through the roof shortly before the kernel crashes: What logs can I look at for more info? Update: Maybe noteworthy - the CPU percentage and network traffic graphs were both normal at the time of the crash. The only abnormality was the average load graph.

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• Build Your Own CE6 Kernel

  - by Kate Moss' Big Fan

  The Share Source Program in Windows CE provides many modules in %_WINCEROOT%\Private\ tree, and the kernel is one of them! Although it is not full source of kernel but it is good enough for tracing it, even tweak the kernel. Tracing the kernel and see how it works is lots of fun, but it is fascinated to modify and verify the change you made. So first comes first, where is the source of kernel? It's in your %_WINCEROOT%\private\winceos\COREOS\nk\ And next question will be "How do I build it?", Some of you may say just "build -c" there and it should be good. If you are the owner of kernel and got full source, that is definitely the right answer, but none of them are applied to our case though. So what should I do? Let's dig deeper into the coreos\nk folder, there are a couples of subfolder, CELOG, KDSTUB, KERNEL and etc. KERNEL\ is the main component of kernel.dll, in the other word, most of the modify to kernel is going to happen here. And the good thing is, you could "build -c" in %_WINCEROOT%\private\winceos\COREOS\nk\kernel\ with no error at all. But before doing that, remember to backup eveything you are going to modify, including the source and binaries; remember, this is not something belong to you, and if you didn't restore them back later, it could end up confuse the subsequence QFE updates! Here is the steps Backup the source code, I will suggest the whole %_WINCEROOT%\private\winceos\COREOS\nk\ Backup the binaries in common\oak\lib\, and again if you are not sure which files, backup the whole %_WINCEROOT%\common\oak\lib\ is the safest way. Do whatever modification you want in %_WINCEROOT%\private\winceos\COREOS\nk\kernel\ build -c in %_WINCEROOT%\private\winceos\COREOS\nk\kernel If everything went well so far, you should get a new nkmain.lib,nkmain.pdb, nkprmain.lib and nkprmain.pdb in %_WINCEROOT%\public\common\oak\lib\%_TGTCPU%\%WINCEDEBUG%\ Basically, you just rebuild your new kernel, the rest is to "blddemo clean -q" to have your new kernel SYSGEN'd and include in your OS Image. Or just "set WINCEREL=1" then "sysgen -p common nk nkprof" and "makeimg" if you can't wait another minutes for "blddemo clean -q" Tat sounds good, but some of you may not like the idea to alter any code in private folder, and not to mention how annoying to backup/restore files every time. Better idea? Yes, Microsoft provides a tool SYSGEN_CAPTURE (http://msdn.microsoft.com/en-us/library/ee504678.aspx for detail and usage) to creates Sources files for public drivers that you want to modify and build in your platform directory. In fact, not only public drivers, virtually anything in the %_WINCEROOT%\public\<project name>\cesysgen\makefile can be captured, and of course including kernel. So I am going to introduce a second way to build your own kernel by using SYSGEN_CAPTURE tool. Again the steps Create a folder in your BSP for building kernel, says %_TARGETPLATROOT%\SRC\Kernel. Use "SYSGEN_CAPTURE -p common nk" and then you will get a SOURCES.KERN, you could also "SYSGEN_CAPTURE -p common nkprof" to generate profiler enabled kernel. rename the SOURCE.KERN to SOURCES and copy one of the sample makefile into your kernel directory. For example the one in PRIVATE\WINCEOS\COREOS\NK\KERNEL\NKNORMAL. Copy the source files you want to modify from private\winceos\coreos\nk\kernel\ into your kernel directory. Modifying the SOURCES= macro to the source files you addes in step 4. For example, if you copied the vm.c, it is going to be SOURCES=vm.c Refer to the private\winceos\COREOS\nk\kernel\sources.inc and add macro defines and proper include path in your SOURCES file. "set WINCEREL=1", "build -c" in your kernel directory and "makeimg", voila! Here is an example for the MACROS you need to add in x86 Here are the macros for x86 CDEFINES=$(CDEFINES) -DIN_KERNEL -DWINCEMACRO -DKERN_CORE # Machine independent defines CDEFINES=$(CDEFINES) -DDBGSUPPORT _COREOSROOT=$(_WINCEROOT)\private\winceos\coreos INCLUDES=$(_COREOSROOT)\inc;$(_COREOSROOT)\nk\inc !IFDEF DP_SETTINGS CDEFINES=$(CDEFINES) -DDP_SETTINGS=$(DP_SETTINGS) !ENDIF ASM_SAFESEH=1 CDEFINES=$(CDEFINES) -Gs100000 -DENCODE_GS_COOKIE

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• On checking kernel parms HP-UX & Oracle 10.2

  - by [email protected]

  Hi,Just did this little script for a customer wanting to investigate if the kernel parameters of their HP-UX machines fits or not the Oracle 10.2 specifications ( looks like someone checked the "User Verified" at database installation time on some prerequisites)Just want to share ( its in Spanish)Hope it helps!--L Normal 0 21 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} ### ### check_kernel_parms.sh ### ### ### ###    NAME ###      check_kernel_parms.sh ### ###    DESCRIPTION ###      Comprueba los parametros de kernel ### ###    NOTES ###     Valido para versiones de SO HP-UX y Oracle 10.2 ###     ### ###    MODIFIED   (MM/DD/YY) ###    lvelasco    05/20/10 - Creacion     V_DATE=`/usr/bin/date +%Y%m%d_%H%M%S` if [ "${1}" != 'sin_traza' ]; then   V_FICHERO_LOG=`dirname $0`/`basename $0`.${V_DATE}.log   exec 4>&1   tee ${V_FICHERO_LOG} >&4 |&   exec 1>&p 2>&1 fi   echo "${V_DATE}- check_params.sh *******************************************" echo "Comenzado ejecucion de chequeo de parametros de kernel en maquina `hostname`" echo "****************************************************************************"   UX_VERS=`uname -a | awk '{print $3}'` KCTUNE=/usr/sbin/kctune MEM_TOTAL_MB=`./check_mem` <-- This should return the physical mem of the machine on bytes MEM_TOTAL=$((MEM_TOTAL_MB*1024))     NPROC=$(${KCTUNE} | grep nproc | grep -v '(nproc' | grep -v *nproc | awk '{print $2}') if [ ${NPROC} -lt 4096 ] then        echo "[FAILED] Information: El parametro nproc con valor actual ${NPROC} debe tener una valor superior a 4096" else        echo "[OK] Information: El parametro nproc con valor actual ${NPROC} debe tener una valor superior a 4096" fi     KSI_ALLOC_MAX_T=$(${KCTUNE} | grep ksi_alloc | awk '{print $2}') KSI_ALLOC_MAX=$((NPROC*8)) if [ ${KSI_ALLOC_MAX_T} -lt ${KSI_ALLOC_MAX} ] then        echo "[FAILED] Information: El parametro ksi_alloc_max con valor actual ${KSI_ALLOC_MAX_T} debe tener una valor superior a ${KSI_ALLOC_MAX}" else        echo "[OK] Information: El parametro ksi_alloc_max con valor actual ${KSI_ALLOC_MAX_T} debe tener una valor superior a ${KSI_ALLOC_MAX}" fi       EXECUTABLE_STACK=$(${KCTUNE} | grep executable_stack | awk '{print $2}') if [ ${EXECUTABLE_STACK} -ne 0 ] then        echo "[FAILED] Information: El parametro executable_stack con valor actual ${EXECUTABLE_STACK} debe tener una valor igual a 0" else        echo "[OK] Information: El parametro executable_stack con valor actual ${EXECUTABLE_STACK} debe tener una valor igual a 0" fi       MAX_THREAD_PROC=$(${KCTUNE} | grep max_thread_proc | awk '{print $2}') if [ ${MAX_THREAD_PROC} -lt 1024 ] then        echo "[FAILED] Information: El parametro max_thread_proc con valor actual ${MAX_THREAD_PROC} debe tener una valor superior a 1024" else        echo "[OK] Information: El parametro max_thread_proc con valor actual ${MAX_THREAD_PROC} debe tener una valor superior a 1024" fi     MAXDSIZ=$(${KCTUNE} | grep 'maxdsiz ' | awk '{print $2}') if [ ${MAXDSIZ} -lt 1073741824 ] then        echo "[FAILED] Information: El parametro maxdsiz con valor actual ${MAXDSIZ} debe tener una valor superior a 1073741824" else        echo "[OK] Information: El parametro maxdsiz con valor actual ${MAXDSIZ} debe tener una valor superior a 1073741824" fi     MAXDSIZ_64BIT=$(${KCTUNE} | grep maxdsiz_64bit | awk '{print $2}') if [ ${MAXDSIZ} -lt 2147483648 ] then        echo "[FAILED] Information: El parametro maxdsiz_64bit con valor actual ${MAXDSIZ_64BIT} debe tener una valor superior a 2147483648" else        echo "[OK] Information: El parametro maxdsiz_64bit con valor actual ${MAXDSIZ_64BIT} debe tener una valor superior a 2147483648" fi   MAXSSIZ=$(${KCTUNE} | grep 'maxssiz ' | awk '{print $2}') if [ ${MAXSSIZ} -lt 134217728 ] then        echo "[FAILED] Information: El parametro maxssiz con valor actual ${MAXSSIZ} debe tener una valor superior a 134217728" else        echo "[OK] Information: El parametro maxssiz con valor actual ${MAXSSIZ} debe tener una valor superior a 134217728" fi     MAXSSIZ_64BIT=$(${KCTUNE} | grep maxssiz_64bit | awk '{print $2}') if [ ${MAXSSIZ} -lt 1073741824 ] then        echo "[FAILED] Information: El parametro maxssiz_64bit con valor actual ${MAXSSIZ} debe tener una valor superior a 1073741824" else        echo "[OK] Information: El parametro maxssiz_64bit con valor actual ${MAXSSIZ} debe tener una valor superior a 1073741824" fi     MAXUPRC_T=$(${KCTUNE} | grep maxuprc | awk '{print $2}') MAXUPRC=$(((NPROC*9)/10)) if [ ${MAXUPRC_T} -lt ${MAXUPRC} ] then        echo "[FAILED] Information: El parametro maxuprc con valor actual ${MAXUPRC_T} debe tener una valor superior a ${MAXUPRC}" else        echo "[OK] Information: El parametro maxuprc con valor actual ${MAXUPRC_T} debe tener una valor superior a ${MAXUPRC}" fi   MSGMNI=$(${KCTUNE} | grep msgmni | awk '{print $2}') if [ ${MSGMNI} -lt ${NPROC} ] then        echo "[FAILED] Information: El parametro msgni con valor actual ${MSGMNI} debe tener una valor superior a ${NPROC}" else        echo "[OK] Information: El parametro msgni con valor actual ${MSGMNI} debe tener una valor superior a ${NPROC}" fi     if [ ${UX_VERS} = "B.11.23" ] then        MSGSEG=$(${KCTUNE} | grep msgseg | awk '{print $2}')        if [ ${MSGSEG} -lt 32767 ]        then        echo "[FAILED] Information: El parametro msgseg con valor actual ${MSGSEG} debe tener una valor superior a 32767"        else        echo "[OK] Information: El parametro msgseg con valor actual ${MSGSEG} debe tener una valor superior a 32767"        fi fi   MSGTQL=$(${KCTUNE} | grep msgtql | awk '{print $2}') if [ ${MSGTQL} -lt ${NPROC} ] then        echo "[FAILED] Information: El parametro msgtql con valor actual ${MSGTQL} debe tener una valor superior a ${NPROC}" else        echo "[OK] Information: El parametro msgtql con valor actual ${MSGTQL} debe tener una valor superior a ${NPROC}" fi       if [ ${UX_VERS} = "B.11.23" ] then        NFILE_T=$(${KCTUNE} | grep nfile | awk '{print $2}')        NFILE=$((15*NPROC+2048))        if [ ${NFILE_T} -lt ${NFILE} ]        then        echo "[FAILED] Information: El parametro nfile con valor actual ${NFILE_T} debe tener una valor superior a ${NFILE}"        else        echo "[OK] Information: El parametro nfile con valor actual ${NFILE_T} debe tener una valor superior a ${NFILE}"        fi fi     NFLOCKS=$(${KCTUNE} | grep nflocks | awk '{print $2}') if [ ${NFLOCKS} -lt ${NPROC} ] then        echo "[FAILED] Information: El parametro nflocks con valor actual ${NFLOCKS} debe tener una valor superior a ${NPROC}" else        echo "[OK] Information: El parametro nflocks con valor actual ${NFLOCKS} debe tener una valor superior a ${NPROC}" fi   NINODE_T=$(${KCTUNE} | grep ninode | grep -v vx | awk '{print $2}') NINODE=$((8*NPROC+2048)) if [ ${NINODE_T} -lt ${NINODE} ] then        echo "[FAILED] Information: El parametro ninode con valor actual ${NINODE_T} debe tener una valor superior a ${NINODE}" else        echo "[OK] Information: El parametro ninode con valor actual ${NINODE_T} debe tener una valor superior a ${NINODE}" fi     NCSIZE_T=$(${KCTUNE} | grep ncsize | awk '{print $2}') NCSIZE=$((NINODE+1024)) if [ ${NCSIZE_T} -lt ${NCSIZE} ] then        echo "[FAILED] Information: El parametro ncsize con valor actual ${NCSIZE_T} debe tener una valor superior a ${NCSIZE}" else        echo "[OK] Information: El parametro ncsize con valor actual ${NCSIZE_T} debe tener una valor superior a ${NCSIZE}" fi     if [ ${UX_VERS} = "B.11.23" ] then        MSGMAP_T=$(${KCTUNE} | grep msgmap | awk '{print $2}')        MSGMAP=$((MSGTQL+2))        if [ ${MSGMAP_T} -lt ${MSGMAP} ]        then        echo "[FAILED] Information: El parametro msgmap con valor actual ${MSGMAP_T} debe tener una valor superior a ${MSGMAP}"        else        echo "[OK] Information: El parametro msgmap con valor actual ${MSGMAP_T} debe tener una valor superior a ${MSGMAP}"        fi fi   NKTHREAD_T=$(${KCTUNE} | grep nkthread | awk '{print $2}') NKTHREAD=$((((NPROC*7)/4)+16)) if [ ${NKTHREAD_T} -lt ${NKTHREAD} ] then        echo "[FAILED] Information: El parametro nkthread con valor actual ${NKTHREAD_T} debe tener una valor superior a ${NKTHREAD}" else        echo "[OK] Information: El parametro nkthread con valor actual ${NKTHREAD_T} debe tener una valor superior a ${NKTHREAD}" fi     SEMMNI=$(${KCTUNE} | grep semmni | grep -v '(semm' | awk '{print $2}') if [ ${SEMMNI} -lt ${NPROC} ] then        echo "[FAILED] Information: El parametro semmni con valor actual ${SEMMNI} debe tener una valor superior a ${NPROC}" else        echo "[OK] Information: El parametro semmni con valor actual ${SEMMNI} debe tener una valor superior a ${NPROC}" fi     SEMMNS_T=$(${KCTUNE} | grep semmns | awk '{print $2}') SEMMNS=$((SEMMNI+2)) if [ ${SEMMNS_T} -lt ${SEMMNI} ] then        echo "[FAILED] Information: El parametro semmns con valor actual ${SEMMNS_T} debe tener una valor superior a ${SEMMNS}" else        echo "[OK] Information: El parametro semmns con valor actual ${SEMMNS_T} debe tener una valor superior a ${SEMMNS}" fi   SEMMNU_T=$(${KCTUNE} | grep semmnu | awk '{print $2}') SEMMNU=$((NPROC-4)) if [ ${SEMMNU_T} -lt ${SEMMNU} ] then        echo "[FAILED] Information: El parametro semmnu con valor actual ${SEMMNU_T} debe tener una valor superior a ${SEMMNU}" else        echo "[OK] Information: El parametro semmnu con valor actual ${SEMMNU_T} debe tener una valor superior a ${SEMMNU}" fi     if [ ${UX_VERS} = "B.11.23" ] then        SEMVMX=$(${KCTUNE} | grep msgseg | awk '{print $2}')        if [ ${SEMVMX} -lt 32767 ]        then        echo "[FAILED] Information: El parametro semvmx con valor actual ${SEMVMX} debe tener una valor superior a 32767"        else        echo "[OK] Information: El parametro semvmx con valor actual ${SEMVMX} debe tener una valor superior a 32767"        fi fi     SHMMNI=$(${KCTUNE} | grep shmmni | awk '{print $2}') if [ ${SHMMNI} -lt 512 ] then        echo "[FAILED] Information: El parametro shmmni con valor actual ${SHMMNI} debe tener una valor superior a 512" else        echo "[OK] Information: El parametro shmmni con valor actual ${SHMMNI} debe tener una valor superior a 512" fi     SHMSEG=$(${KCTUNE} | grep shmseg | awk '{print $2}') if [ ${SHMSEG} -lt 120 ] then        echo "[FAILED] Information: El parametro shmseg con valor actual ${SHMSEG} debe tener una valor superior a 120" else        echo "[OK] Information: El parametro shmseg con valor actual ${SHMSEG} debe tener una valor superior a 120" fi   VPS_CEILING=$(${KCTUNE} | grep vps_ceiling | awk '{print $2}') if [ ${VPS_CEILING} -lt 64 ] then        echo "[FAILED] Information: El parametro vps_ceiling con valor actual ${VPS_CEILING} debe tener una valor superior a 64" else        echo "[OK] Information: El parametro vps_ceiling con valor actual ${VPS_CEILING} debe tener una valor superior a 64" fi   SHMMAX=$(${KCTUNE} | grep shmmax | awk '{print $2}') if [ ${SHMMAX} -lt ${MEM_TOTAL} ] then         echo "[FAILED] Information: El parametro shmmax con valor actual ${SHMMAX} debe tener una valor superior a ${MEM_TOTAL}" else         echo "[OK] Information: El parametro shmmax con valor actual ${SHMMAX} debe tener una valor superior a ${MEM_TOTAL}" fi exit 0  

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• Linux Kernel Threads - scheduler

  - by Kartlee

  Hi People, Is Linux Kernel scheduler a part of init process? My understanding is that it is part of Kernel threads managed internally not visible to user by either top or ps. Please correct my understanding. Is it possible to view standard kernel threads through any kernel debugger to see how standard threads occupy cpu activity? -Kartlee

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• kernel panic after LVM setup

  - by Manuel Sopena Ballesteros

  I broke my webserver... My setup is: VMWare ESXi environemt CPanel installed CentOS release 6.5 (Final) 4 CPUs 2G RAM 2x VM disks 100G each LVM system This was my previous storage settings (the server was working fine at this time): # df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_test01-lv_root 95G 1.4G 88G 2% / tmpfs 939M 0 939M 0% /dev/shm /dev/sdb1 99G 188M 94G 1% /tmp /dev/sda1 485M 54M 407M 12% /boot My web developer asked me to merge /tmp and / disks so this is what I did: Delete /dev/sdb1 partition using fdisk Create a new partition as LVM on /dev/sdb1 using fdisk Create a new physical volume -- pvcreate /dev/sdb1 Extend volume group -- vgextend /dev/sdb1 vg_test01 Extend logical volume -- lvextend -l +100%FREE /dev/vg_test01/lv_root Resize filesystem -- resize2fs /dev/vg_test01/lv_root This is the new configuration: # df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_test01-lv_root 213G 105G 97G 52% / tmpfs 939M 0 939M 0% /dev/shm /dev/sda1 485M 54M 407M 12% /boot /usr/tmpDSK 4.0G 145M 3.6G 4% /tmp Since I have the new settings my web server is throwing kernel panics quite often (around every 2 days). The message says: INFO: task <taskName>:<pid> blocked for more than 120 seconds. The list of process affected that I can see from the console are: mysqld queueprocd httpd suphp vmtoolsd loop0 auditd The only way I can fix this is reseting (cold reboot) the VM. I don't think it is a hardware issue as sar is not showing any bottleneck: Linux 2.6.32-431.3.1.el6.x86_64 (test01) 08/22/2014 _x86_64_ (4 CPU) 12:00:01 AM CPU %user %nice %system %iowait %steal %idle 12:10:01 AM all 26.86 0.01 0.98 0.57 0.00 71.57 12:20:01 AM all 1.78 0.02 1.03 0.08 0.00 97.09 12:30:01 AM all 26.34 0.02 0.85 0.05 0.00 72.74 12:40:01 AM all 27.12 0.01 1.11 1.22 0.00 70.54 12:50:01 AM all 1.59 0.02 0.94 0.13 0.00 97.32 01:00:01 AM all 26.10 0.01 0.77 0.04 0.00 73.07 01:10:01 AM all 27.51 0.01 1.16 0.14 0.00 71.18 01:20:01 AM all 1.80 0.07 1.06 0.08 0.00 96.99 01:30:01 AM all 26.19 0.01 0.78 0.05 0.00 72.96 01:40:01 AM all 26.62 0.02 0.87 0.05 0.00 72.45 01:50:02 AM all 1.35 0.01 0.87 0.02 0.00 97.75 02:00:01 AM all 26.11 0.02 0.69 0.02 0.00 73.17 02:10:01 AM all 26.73 0.02 0.89 0.14 0.00 72.21 02:20:01 AM all 1.45 0.01 0.92 0.04 0.00 97.58 02:30:01 AM all 26.59 0.01 1.06 0.03 0.00 72.31 02:40:01 AM all 26.27 0.01 0.72 0.05 0.00 72.95 02:50:01 AM all 0.86 0.01 0.50 0.09 0.00 98.53 03:00:01 AM all 25.61 0.02 0.39 0.03 0.00 73.96 03:10:01 AM all 26.30 0.08 0.66 0.14 0.00 72.82 03:20:01 AM all 0.81 0.01 0.51 0.04 0.00 98.63 03:30:02 AM all 26.15 0.02 0.53 0.07 0.00 73.24 03:40:01 AM all 26.06 0.01 0.47 0.04 0.00 73.42 03:50:01 AM all 0.96 0.02 0.51 0.03 0.00 98.48 Average: all 17.69 0.02 0.79 0.14 0.00 81.36 06:58:14 AM LINUX RESTART 07:00:01 AM CPU %user %nice %system %iowait %steal %idle 07:10:01 AM all 1.04 0.02 0.57 0.95 0.00 97.42 07:20:02 AM all 0.66 0.01 0.39 0.06 0.00 98.87 07:30:01 AM all 25.71 0.01 0.45 0.16 0.00 73.67 07:40:01 AM all 25.88 0.01 0.35 0.08 0.00 73.68 07:50:01 AM all 1.13 0.02 0.55 0.11 0.00 98.19 As you can see the server became unresponsive at 03.50 AM and I had to reset the VM at 06.58 AM to bring the website up again. I would appreciate any help/assistance to fix this issue. thank you very much

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• Frequent Kernel Panic on CentOS 6.5

  - by Manuel Sopena Ballesteros

  I have a webserver with the configuration below: VMWare ESXi environemt CPanel installed CentOS release 6.5 (Final) 4 CPUs 2G RAM 2x VM disks 100G each LVM system My issue is I am getting kernel panic quite frequently. These is a list of some processes blocked I could see from the console: mysqld queueprocd httpd suphp vmtoolsd loop0 auditd this is my sar logs Linux 2.6.32-431.3.1.el6.x86_64 (test01) 08/22/2014 _x86_64_ (4 CPU) 12:00:01 AM CPU %user %nice %system %iowait %steal %idle 12:10:01 AM all 26.86 0.01 0.98 0.57 0.00 71.57 12:20:01 AM all 1.78 0.02 1.03 0.08 0.00 97.09 12:30:01 AM all 26.34 0.02 0.85 0.05 0.00 72.74 12:40:01 AM all 27.12 0.01 1.11 1.22 0.00 70.54 12:50:01 AM all 1.59 0.02 0.94 0.13 0.00 97.32 01:00:01 AM all 26.10 0.01 0.77 0.04 0.00 73.07 01:10:01 AM all 27.51 0.01 1.16 0.14 0.00 71.18 01:20:01 AM all 1.80 0.07 1.06 0.08 0.00 96.99 01:30:01 AM all 26.19 0.01 0.78 0.05 0.00 72.96 01:40:01 AM all 26.62 0.02 0.87 0.05 0.00 72.45 01:50:02 AM all 1.35 0.01 0.87 0.02 0.00 97.75 02:00:01 AM all 26.11 0.02 0.69 0.02 0.00 73.17 02:10:01 AM all 26.73 0.02 0.89 0.14 0.00 72.21 02:20:01 AM all 1.45 0.01 0.92 0.04 0.00 97.58 02:30:01 AM all 26.59 0.01 1.06 0.03 0.00 72.31 02:40:01 AM all 26.27 0.01 0.72 0.05 0.00 72.95 02:50:01 AM all 0.86 0.01 0.50 0.09 0.00 98.53 03:00:01 AM all 25.61 0.02 0.39 0.03 0.00 73.96 03:10:01 AM all 26.30 0.08 0.66 0.14 0.00 72.82 03:20:01 AM all 0.81 0.01 0.51 0.04 0.00 98.63 03:30:02 AM all 26.15 0.02 0.53 0.07 0.00 73.24 03:40:01 AM all 26.06 0.01 0.47 0.04 0.00 73.42 03:50:01 AM all 0.96 0.02 0.51 0.03 0.00 98.48 Average: all 17.69 0.02 0.79 0.14 0.00 81.36 06:58:14 AM LINUX RESTART 07:00:01 AM CPU %user %nice %system %iowait %steal %idle 07:10:01 AM all 1.04 0.02 0.57 0.95 0.00 97.42 07:20:02 AM all 0.66 0.01 0.39 0.06 0.00 98.87 07:30:01 AM all 25.71 0.01 0.45 0.16 0.00 73.67 07:40:01 AM all 25.88 0.01 0.35 0.08 0.00 73.68 As you can see the server became unresponsive at 03.50 AM and I had to reset the VM at 06.58 AM to fix it. sar -d 03:00:01 PM dev8-16 0.16 0.01 3.37 20.78 0.00 12.40 9.29 0.15 03:00:01 PM dev8-0 4.08 5.72 77.50 20.38 0.06 15.15 3.13 1.28 03:00:01 PM dev253-0 10.37 5.74 80.87 8.35 0.13 12.52 1.24 1.29 03:00:01 PM dev253-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 03:10:01 PM dev8-16 0.27 0.17 3.17 12.22 0.00 11.49 7.95 0.22 03:10:01 PM dev8-0 6.37 18.98 136.19 24.34 0.05 7.25 2.18 1.39 03:10:01 PM dev253-0 17.91 19.15 137.94 8.77 0.13 7.11 0.78 1.41 03:10:01 PM dev253-1 0.18 0.00 1.41 8.00 0.00 9.09 0.52 0.01 03:10:01 PM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm %util 03:20:01 PM dev8-16 0.17 0.23 2.04 13.39 0.00 6.07 5.29 0.09 03:20:01 PM dev8-0 3.83 18.57 78.45 25.35 0.05 13.25 2.73 1.05 03:20:01 PM dev253-0 10.30 18.80 80.49 9.64 0.14 13.89 1.03 1.06 03:20:01 PM dev253-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 03:30:01 PM dev8-16 0.26 0.16 4.59 18.56 0.00 6.44 5.54 0.14 03:30:01 PM dev8-0 5.97 24.07 117.83 23.77 0.05 8.53 2.13 1.27 03:30:01 PM dev253-0 15.90 24.23 122.42 9.22 0.12 7.71 0.81 1.29 03:30:01 PM dev253-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 03:40:01 PM dev8-16 0.20 0.00 2.32 11.44 0.00 8.35 5.90 0.12 03:40:01 PM dev8-0 4.39 19.58 77.94 22.24 0.06 12.87 2.12 0.93 03:40:01 PM dev253-0 10.25 19.58 80.25 9.74 0.12 11.63 0.91 0.94 03:40:01 PM dev253-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 03:50:01 PM dev8-16 0.23 0.50 2.32 12.44 0.00 6.27 5.13 0.12 03:50:01 PM dev8-0 5.09 9.00 95.04 20.45 0.04 7.36 2.10 1.07 03:50:01 PM dev253-0 12.47 9.50 96.82 8.53 0.08 6.76 0.87 1.08 03:50:01 PM dev253-1 0.07 0.00 0.54 8.00 0.00 14.10 0.40 0.00 04:00:01 PM dev8-16 0.21 0.00 2.04 9.89 0.00 7.00 5.87 0.12 04:00:01 PM dev8-0 4.68 1.64 94.70 20.57 0.05 10.71 2.41 1.13 04:00:01 PM dev253-0 12.27 1.64 96.74 8.02 0.12 9.95 0.93 1.14 sar -q 01:00:01 AM 6 205 2.02 1.32 0.81 01:10:01 AM 3 187 0.08 0.72 0.86 01:20:01 AM 2 187 0.04 0.18 0.49 01:30:01 AM 4 205 2.04 1.34 0.82 01:40:01 AM 2 185 0.02 0.68 0.83 01:50:02 AM 1 185 0.08 0.15 0.45 02:00:01 AM 5 202 2.02 1.30 0.78 02:10:01 AM 4 185 0.11 0.72 0.84 02:20:01 AM 1 183 0.17 0.15 0.45 02:30:01 AM 5 206 2.03 1.32 0.79 02:40:01 AM 2 184 0.08 0.70 0.83 02:50:01 AM 1 183 0.00 0.10 0.43 03:00:01 AM 7 205 2.03 1.32 0.78 03:10:01 AM 2 194 0.34 0.73 0.83 03:20:01 AM 1 184 0.00 0.13 0.44 03:30:02 AM 4 201 2.04 1.32 0.78 03:40:01 AM 2 193 0.06 0.67 0.81 03:50:01 AM 1 183 0.06 0.12 0.43 Average: 3 192 0.68 0.70 0.69 06:58:14 AM LINUX RESTART 07:00:01 AM runq-sz plist-sz ldavg-1 ldavg-5 ldavg-15 07:10:01 AM 2 181 0.00 0.09 0.11 07:20:02 AM 1 179 0.00 0.00 0.04 07:30:01 AM 4 197 2.12 1.33 0.58 sar -r Linux 2.6.32-431.3.1.el6.x86_64 (test01) 08/22/2014 _x86_64_ (4 CPU) 12:00:01 AM kbmemfree kbmemused %memused kbbuffers kbcached kbcommit %commit 12:10:01 AM 227484 1694468 88.16 117444 917004 635308 10.50 12:20:01 AM 219692 1702260 88.57 119556 920540 630940 10.43 12:30:01 AM 196248 1725704 89.79 121376 923592 695048 11.49 12:40:01 AM 127524 1794428 93.36 125004 1016196 633048 10.46 12:50:01 AM 127156 1794796 93.38 128212 1014536 624992 10.33 01:00:01 AM 110764 1811188 94.24 129964 1001608 700016 11.57 01:10:01 AM 160560 1761392 91.65 132260 973472 628640 10.39 01:20:01 AM 133076 1788876 93.08 134144 982608 655524 10.83 01:30:01 AM 121512 1800440 93.68 135548 985676 700500 11.58 01:40:01 AM 140640 1781312 92.68 137220 988576 628280 10.38 01:50:02 AM 139160 1782792 92.76 138688 990672 625224 10.33 02:00:01 AM 106112 1815840 94.48 139940 993976 700360 11.57 02:10:01 AM 155400 1766552 91.91 142112 971864 625656 10.34 02:20:01 AM 154056 1767896 91.98 143732 975556 621352 10.27 02:30:01 AM 110856 1811096 94.23 145032 978288 709360 11.72 02:40:01 AM 140200 1781752 92.71 146568 980656 624872 10.33 02:50:01 AM 137600 1784352 92.84 148940 984484 621948 10.28 03:00:01 AM 105032 1816920 94.54 150208 985736 706060 11.67 03:10:01 AM 168996 1752956 91.21 154708 941500 656312 10.85 03:20:01 AM 169408 1752544 91.19 156096 944100 621780 10.28 03:30:02 AM 132360 1789592 93.11 157724 951612 701296 11.59 03:40:01 AM 159012 1762940 91.73 158940 942560 656292 10.85 03:50:01 AM 163192 1758760 91.51 160312 944576 624544 10.32 Average: 148089 1773863 92.29 140162 969973 653363 10.80 06:58:14 AM LINUX RESTART 07:00:01 AM kbmemfree kbmemused %memused kbbuffers kbcached kbcommit %commit 07:10:01 AM 1016628 905324 47.10 85568 447556 600932 9.93 07:20:02 AM 1009996 911956 47.45 87616 451200 596156 9.85 07:30:01 AM 961128 960824 49.99 89164 464332 658912 10.89 07:40:01 AM 973376 948576 49.35 90880 473084 600176 9.92 dmesg does not show any relevant information. I don't see any bottleneck in sar, any idea what can I check next? thank you very much

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• Update to kernel 3.12 seems to fail: uname reports old rc7

  - by carlo

  I currently run Xubuntu 13.10 with kernel 3.12 rc7. Today I tried updating to the latest 3.12 kernel (non-rc), but this seems to fail. When installing the image and headers I see the following error passing by: ... run-parts: executing /etc/kernel/postinst.d/dkms 3.12.0-031200-generic /boot/vmlinuz-3.12.0-031200-generichis Error! The dkms.conf for this module includes a BUILD_EXCLUSIVE directive which does not match this kernel/arch. This indicates that it should not be built. ... After rebooting, when I do uname -r or cat /proc/version it tells me that I'm still running on the old rc7 kernel. Since my microphone wasn't working on my Sony Vaio Pro 13 I did download and install the latest ALSA drivers using the oem-audio-hda-daily-dkms package which seem to fix the problem (with the mic). Maybe this has something to do with it? I also tried removing the package using sudo apt-get purge oem-audio-hda-daily-dkms but no success.

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• ubuntu 12.04 non-pae kernel 3.5.0-17-wt-nonpae

  - by volker

  ubuntu 12.04 non-pae kernel 3.5.0-17-wt-nonpae: installed this kernel on dell d505 (pentium M) under ubuntu 12.04. Runs slower than 3.2.0-33 and 3.2.0-030200. Is this to be expected? Could not install the kernel headers provided on the ppa: "dependencies cannot be fullfilled: linux-headers-3.5.0-17". After installing the kernel image, Synaptic offered me to install linux-headers-3.5.0-18 and linux-headers-3.5.0-18-generic (which could be installed successfully). volker

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• Can't update kernel to 2.6.35.27

  - by Uri Herrera

  When I try to update I get this message, I'm guessing I'm missing something here? Filesystem Type Size Used Avail Use% Mounted on /dev/sdb6 ext4 43G 7.7G 33G 20% / none devtmpfs 1.6G 349k 1.6G 1% /dev none tmpfs 1.6G 5.9M 1.6G 1% /dev/shm none tmpfs 1.6G 218k 1.6G 1% /var/run none tmpfs 1.6G 0 1.6G 0% /var/lock /dev/sdb2 fuseblk 258G 198G 60G 77% /media/Backup /dev/sda1 fuseblk 321G 175G 146G 55% /media/Media /dev/sdb1 ext4 96M 84M 6.7M 93% /boot /dev/sdb7 ext4 175G 81G 86G 49% /home Here's the output: Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be REMOVED: linux-image-2.6.35-22-generic 0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded. 5 not fully installed or removed. After this operation, 107MB disk space will be freed. Do you want to continue [Y/n]? y (Reading database ... 282211 files and directories currently installed.) Removing linux-image-2.6.35-22-generic ... Examining /etc/kernel/postrm.d . run-parts: executing /etc/kernel/postrm.d/initramfs-tools 2.6.35-22-generic /boot/vmlinuz-2.6.35-22-generic run-parts: executing /etc/kernel/postrm.d/zz-update-grub 2.6.35-22-generic /boot/vmlinuz-2.6.35-22-generic /etc/default/grub: 23: Syntax error: newline unexpected run-parts: /etc/kernel/postrm.d/zz-update-grub exited with return code 2 Failed to process /etc/kernel/postrm.d at /var/lib/dpkg/info/linux-image-2.6.35-22- generic.postrm line 328. dpkg: error processing linux-image-2.6.35-22-generic (--remove): subprocess installed post-removal script returned error exit status 1 Errors were encountered while processing: linux-image-2.6.35-22-generic E: Sub-process /usr/bin/dpkg returned an error code (1)

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• How to keep specific old kernel on my next kernel upgrade?

  - by tvrtko

  I just updated my Ubuntu 14.04 and got a new kernel. This new kernel is not working properly for me so I booted the previous version. Let's call this good old working version "3.13.0-24.47". Now, I want to keep this "3.13.0-24.47" version until I decide to delete it manually. I want to be able to upgrade my kernel each time there is a new version in hope of getting the one which works again. Until then, I want to use the "3.13.0-24.47". I'm afraid that next update will delete my "3.13.0-24.47" version because there are only two kernel versions available at a given time on my system (/boot).

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• Load old kernel module while keeping current

  - by legion

  So I was wondering if there is anyway that I would be able to load an old iwlwifi from a 2.6 kernel while still using the 3.2 kernel and if there was a guide to doing so? I need to be able to do so because my wireless card is.... well the new kernels have broken all support for my card, which is a Intel Ultimate-N 6300. I'm extremely upset with how badly they broke support for this card to the point where I can't connect to any router that isn't wifi N enabled and even then only a select few routers work, it amazes me as to how awful it is and whats more amazing is how well it worked in 2.6 kernels. I've tried all the work arounds that have been discussed to try and fix this, and the only thing I have found that works is running a 2.6 kernel. However I would like to be able to keep my 3.2 kernel and just load up an old version of iwlwifi that actually supports it, is there anyway to do this?

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• old kernel uninstall select video drivers

  - by Zero

  On synaptic selected my old kernel to uninstall: linux-generic linux-headers-3.2.0-31-generic linux-image-3.2.0-31-generic linux-image-3.2.0-33-generic linux-image-generic But if i select to uninstall linux-headers-3.2.0-33-generic it select my display drivers and after that wanna install pae kernel. It's possible delete header files without loosing my video drivers and without installing pae kernel ?

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