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  • How to compile the Linux kernel

    <b>TuxRadar:</b> "Do you want to remove bloat from your Linux installation? Are you looking to enable extra features that aren't provided by your distro? Fancy trying some of the cutting-edge patches doing the rounds? You'll need to recompile your kernel, and while it might look like black magic if you've never done it before, it's actually pretty straightforward."

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  • KVM, QEMU, and kernel project management

    <b>LWN.net:</b> "Both the code and its development model are seen as conforming much more closely to the Linux way of doing things than the alternatives; KVM is expected to be the long-term virtualization solution for Linux. So, one might well wonder, why has KVM been the topic of one of the more massive and less pleasant linux-kernel discussions in some time?"

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  • Tune your Linux kernel with sysctl

    <b>Ghacks:</b> "Today most kernels work out of the box with most hardware. But there are times when you could squeeze out a bit more performance or even lighten your kernel on the fly. You can do that with the sysctl command."

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  • Collecting and analyzing Linux kernel crashes

    <b>Dedoimedo:</b> "Welcome to the sixth article in the long series on Kernel crash collection and analysis. We have started the series with LKCD, an older utility, followed by a very long review of Kdump, both of which are available as PDF guides, free for download. "

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  • Linux Servers to Get Kernel Refresh

    <b>ServerWatch:</b> "A new version of a major Linux server OS distro: interesting. A new version of Windows: intriguing. A new version of OS X: could be fun to play with. But a new Linux kernel? Big deal."

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  • The Huge Disaster Within The Linux 2.6.35 Kernel

    <b>Phoronix:</b> "While the 2.6.35 code has not even seen its first release candidate yet, there are some massive performance drops in a variety of different tests that have yet to be corrected and nothing like we have encountered with previous kernel release cycles especially for a regression that has lived now for about one week."

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  • Huawei E3276 LTE uplink slow in the routing Ubuntu, but not with other devices in the LAN

    - by Mytomi
    I have a Huawei E3276 LTE dongle (12d1:14fe - 12d1:1506) and a problem with the upstream speed. The problem is not only present with Ubuntu 14.04 LTS (64 bit workstation, kernel 3.16), but also with Raspbian Jessie for Raspberry PI (kernel 3.14). Upstream seems to be always limited to 5 Mbit/s whenever I check the speed from the Linux computer that I use as a LTE router. The other computers in the LAN always get about 10-15 Mbit/s upstream, even though the traffic is routed through the same Linux computer suffering from seemingly capped uplink. Downstream speed is always fine, 25 Mbit/s. I even installed Windows 7 in the same computer as Ubuntu and the speeds are 25 Mbit/s down, 15 Mbit/s up. So the problem is not with E3276 device itself or in the mobile subscription, but in the Huawei E3276 Linux compatibility. Maybe something in the kernel? I have made sure that the matter is not with iptables rules: the speed does not noticeably increase when iptables is disabled. Turning off IPv4 forwarding does not improve speed either. I'm not sure what settings and logs do help in debugging the situation. Please ask for more details, if you have a clue what might be wrong. Thanks, Mytomi

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  • How to use the Raring/Saucy netboot installer to install Precise?

    - by mikepurvis
    We have a Haswell motherboard with onboard ethernet controllers which are not supported in the Precise (3.2) kernel. However, we're using netboot installation, and we'd really like to stick with the LTS version. Once the Precise install is completed, we can install the linux-generic-lts-saucy package, which gets us the ethernet hardware support which is ultimately required. So, our options are: Plug in a USB-Ethernet (or even wifi) dongle, perform the install that way. Modify the Precise installer to somehow include the required driver (a udeb, or some early_command invocation?) Modify the Raring installer (3.8 kernel, which supports the device) to instead install Precise. If it's possible the third option seems like the simplest and most logical to me. Now, we are already using the precise-updates installer (Aug 2013), as opposed to the original April 2012 installer. However, the precise-updates installer still appears to use the 3.2 kernel. I'm already comfortable with preseeding and modifying the netboot initrd. So my question is, can I somehow modify the Raring/Saucy netboot initrd to instead install Precise? Thanks.

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  • Compiling kernal problem

    - by James
    Hi, I have a hp pavilion dm3t with intel HD graphics running ubuntu 10.10 64 bit. I'm trying to compile and install a patched kernel according to this, https://launchpad.net/~kamalmostafa/+archive/linux-kamal-mjgbacklight So I downloaded the tarball from here (linked to from the page above): http://kernel.ubuntu.com/git?p=kamal/ubuntu-maverick.git;a=shortlog;h=refs/heads/mjg-backlight I untar'd it to a directory, entered the directory and did: make defconfig which was successful, so I did: make which seemed to work fine until it gave these errors: ubuntu/ndiswrapper/iw_ndis.c:1966: error: unknown field ‘num_private’ specified in initializer ubuntu/ndiswrapper/iw_ndis.c:1966: warning: initialization makes pointer from integer without a cast ubuntu/ndiswrapper/iw_ndis.c:1967: error: unknown field ‘num_private_args’ specified in initializer ubuntu/ndiswrapper/iw_ndis.c:1967: warning: excess elements in struct initializer ubuntu/ndiswrapper/iw_ndis.c:1967: warning: (near initialization for ‘ndis_handler_def’) ubuntu/ndiswrapper/iw_ndis.c:1970: error: unknown field ‘private’ specified in initializer ubuntu/ndiswrapper/iw_ndis.c:1970: warning: initialization makes integer from pointer without a cast ubuntu/ndiswrapper/iw_ndis.c:1970: error: initializer element is not computable at load time ubuntu/ndiswrapper/iw_ndis.c:1970: error: (near initialization for ‘ndis_handler_def.num_standard’) ubuntu/ndiswrapper/iw_ndis.c:1971: error: unknown field ‘private_args’ specified in initializer ubuntu/ndiswrapper/iw_ndis.c:1971: warning: initialization from incompatible pointer type make[2]: *** [ubuntu/ndiswrapper/iw_ndis.o] Error 1 make[1]: *** [ubuntu/ndiswrapper] Error 2 make: *** [ubuntu] Error 2 How can I compile and install this kernel successfully? I'm new to this and would appreciate any help.

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  • Is SSD TRIM support still automatic in 12.10?

    - by dam
    Folks I had automatic TRIM working on my laptop running Ubuntu Precise. As in the TRIM guide I added discard to mount options in /etc/fstab, and hdparm --read-sector read 0s immediately after a rm && sync. Using the very same hardware, laptop and SSD, TRIM seems no longer to be automatic after upgrading to Quantal. I recognise the test in the guide I mentioned above may not necessarily work. SSD erase blocks and all that. But Quantal is at least different. After deleting the file and syncing, its data are still on disk and unerased even after waiting several minutes. fstrim will then 0 the dead file's blocks. Once. Repeat the same test five minutes later, and fstrim does nothing. I figure this is probably really a kernel issue, but that box is too black for my spelunking torch. I'm prepared to believe that kernel 3.5 knows what I want better than I do, and all is well despite appearances, but it looks for all the world like TRIM isn't quite all there any more. Anybody have the scoop on TRIM in Quantal/kernel 3.5?

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  • Oracle Linux 6 DVDs Now Available

    - by sergio.leunissen
    On Sunday 6 February 2011, Oracle Linux 6 was released on the Unbreakable Linux Network for customers with an Oracle Linux support subscription. Shortly after that, the Oracle Linux 6 RPMs were made available on our public yum server. Today we published the installation DVD images on edelivery.oracle.com/linux. Oracle Linux 6 is free to download, install and use. The full release notes are here, but similar to my recent post about Oracle Linux 5.6, I wanted to highlight a few items about this release. Unbreakable Enterprise Kernel As is the case with Oracle Linux 5.6, the default installed kernel on x86_64 platform in Oracle Linux 6 is the Unbreakable Enterprise Kernel. If you haven't already, I highly recommend you watch the replay of this webcast by Chris Mason on the performance improvements made in this kernel. # uname -r 2.6.32-100.28.5.el6.x86_64 The Unbreakable Enterprise Kernel is delivered via the package kernel-uek: [root@localhost ~]# yum info kernel-uek ... Installed Packages Name : kernel-uek Arch : x86_64 Version : 2.6.32 Release : 100.28.5.el6 Size : 84 M Repo : installed From repo : anaconda-OracleLinuxServer-201102031546.x86_64 Summary : The Linux kernel URL : http://www.kernel.org/ License : GPLv2 Description: The kernel package contains the Linux kernel (vmlinuz), the core of : any Linux operating system. The kernel handles the basic functions : of the operating system: memory allocation, process allocation, : device input and output, etc. ext4 file system The ext4 or fourth extended filesystem replaces ext3 as the default filesystem in Oracle Linux 6. # mount /dev/mapper/VolGroup-lv_root on / type ext4 (rw) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0") /dev/sda1 on /boot type ext4 (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) Red Hat compatible kernel Oracle Linux 6 also includes a Red Hat compatible kernel built directly from RHEL source. It's already installed, so booting it is a matter of editing /etc/grub.conf # rpm -qa | grep kernel-2.6.32 kernel-2.6.32-71.el6.x86_64 Oracle Linux 6 no longer includes a Red Hat compatible kernel with Oracle bug fixes. The only Red Hat compatible kernel included is the one built directly from RHEL source. Yum-only access to Unbreakable Linux Network (ULN) Oracle Linux 6 uses yum exclusively for access to Unbreakable Linux Network. To register your system with ULN, use the following command: # uln_register No Itanium Support Oracle Linux 6 is not supported on the Itanium (ia64) platform. Next Steps Read the release notes Download Oracle Linux 6 for free Discuss on the Oracle Linux forum

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  • Portletfaces Bridge, Null pointer exception

    - by Moayad Abu Jaber
    I faced problem in Icefaces portlet using portletfaces bridge inside liferay. the problem is when I open the browser for the first time I got null pointer exception. for example i opened the portal through chrome browser then open firefox, my portlet I made in ICEfaces throw null pointer exception. below you will find full stack trace: java.lang.NullPointerException at org.icefaces.impl.push.servlet.ProxyHttpServletRequest.getCookies(ProxyHttpServletRequest.java:307) at org.icepush.PushContext.getBrowserIDFromCookie(PushContext.java:89) at org.icepush.PushContext.createPushId(PushContext.java:46) at org.icefaces.impl.push.servlet.ICEpushResourceHandler$ICEpushResourceHandlerImpl.beforePhase(ICEpushResourceHandler.java:172) at org.icefaces.impl.push.servlet.ICEpushResourceHandler.beforePhase(ICEpushResourceHandler.java:92) at com.sun.faces.lifecycle.Phase.handleBeforePhase(Phase.java:228) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:99) at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:116) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) at org.portletfaces.bridge.BridgeImpl.doFacesRequest(BridgeImpl.java:391) at org.portletfaces.bridge.GenericFacesPortlet.doView(GenericFacesPortlet.java:181) at javax.portlet.GenericPortlet.doDispatch(GenericPortlet.java:328) at javax.portlet.GenericPortlet.render(GenericPortlet.java:233) at com.liferay.portlet.FilterChainImpl.doFilter(FilterChainImpl.java:101) at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:64) at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:92) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646) at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:551) at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:488) at com.liferay.portlet.InvokerPortletImpl.invoke(InvokerPortletImpl.java:638) at com.liferay.portlet.InvokerPortletImpl.invokeRender(InvokerPortletImpl.java:723) at com.liferay.portlet.InvokerPortletImpl.render(InvokerPortletImpl.java:425) at org.apache.jsp.html.portal.render_005fportlet_jsp._jspService(render_005fportlet_jsp.java:1440) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646) at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:551) at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:488) at com.liferay.portal.util.PortalImpl.renderPortlet(PortalImpl.java:3740) at com.liferay.portal.util.PortalUtil.renderPortlet(PortalUtil.java:1180) at com.liferay.portlet.layoutconfiguration.util.RuntimePortletUtil.processPortlet(RuntimePortletUtil.java:160) at com.liferay.portlet.layoutconfiguration.util.RuntimePortletUtil.processPortlet(RuntimePortletUtil.java:94) at com.liferay.portlet.layoutconfiguration.util.RuntimePortletUtil.processTemplate(RuntimePortletUtil.java:256) at com.liferay.portlet.layoutconfiguration.util.RuntimePortletUtil.processTemplate(RuntimePortletUtil.java:181) at org.apache.jsp.html.portal.layout.view.portlet_jsp._jspService(portlet_jsp.java:821) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646) at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:551) at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:488) at com.liferay.portal.action.LayoutAction.includeLayoutContent(LayoutAction.java:370) at com.liferay.portal.action.LayoutAction.processLayout(LayoutAction.java:629) at com.liferay.portal.action.LayoutAction.execute(LayoutAction.java:232) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at com.liferay.portal.struts.PortalRequestProcessor.process(PortalRequestProcessor.java:153) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at com.liferay.portal.servlet.MainServlet.callParentService(MainServlet.java:508) at com.liferay.portal.servlet.MainServlet.service(MainServlet.java:485) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.servlet.filters.strip.StripFilter.processFilter(StripFilter.java:309) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:121) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:182) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.servlet.filters.autologin.AutoLoginFilter.processFilter(AutoLoginFilter.java:254) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302) at com.liferay.portal.servlet.FriendlyURLServlet.service(FriendlyURLServlet.java:134) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.servlet.filters.strip.StripFilter.processFilter(StripFilter.java:261) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.jav a:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:110) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:182) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.servlet.filters.i18n.I18nFilter.processFilter(I18nFilter.java:222) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.servlet.filters.etag.ETagFilter.processFilter(ETagFilter.java:45) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.servlet.filters.autologin.AutoLoginFilter.processFilter(AutoLoginFilter.java:254) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302) at com.liferay.portal.servlet.filters.virtualhost.VirtualHostFilter.processFilter(VirtualHostFilter.java:311) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) at com.liferay.portal.servlet.filters.threadlocal.ThreadLocalFilter.processFilter(ThreadLocalFilter.java:35) at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:470) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Thread.java:619) I post this in portletfaces JIRA and their forum, no response so far. hope find the solution here, but I guess this bug in portletfaces! thanks

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  • Kernel panic when bringing up DRBD resource

    - by sc.
    I'm trying to set up two machines synchonizing with DRBD. The storage is setup as follows: PV - LVM - DRBD - CLVM - GFS2. DRBD is set up in dual primary mode. The first server is set up and running fine in primary mode. The drives on the first server have data on them. I've set up the second server and I'm trying to bring up the DRBD resources. I created all the base LVM's to match the first server. After initializing the resources with `` drbdadm create-md storage I'm bringing up the resources by issuing drbdadm up storage After issuing that command, I get a kernel panic and the server reboots in 30 seconds. Here's a screen capture. My configuration is as follows: OS: CentOS 6 uname -a Linux host.structuralcomponents.net 2.6.32-279.5.2.el6.x86_64 #1 SMP Fri Aug 24 01:07:11 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux rpm -qa | grep drbd kmod-drbd84-8.4.1-2.el6.elrepo.x86_64 drbd84-utils-8.4.1-2.el6.elrepo.x86_64 cat /etc/drbd.d/global_common.conf global { usage-count yes; # minor-count dialog-refresh disable-ip-verification } common { handlers { pri-on-incon-degr "/usr/lib/drbd/notify-pri-on-incon-degr.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b /proc/sysrq-trigger ; reboot -f"; pri-lost-after-sb "/usr/lib/drbd/notify-pri-lost-after-sb.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b /proc/sysrq-trigger ; reboot -f"; local-io-error "/usr/lib/drbd/notify-io-error.sh; /usr/lib/drbd/notify-emergency-shutdown.sh; echo o /proc/sysrq-trigger ; halt -f"; # fence-peer "/usr/lib/drbd/crm-fence-peer.sh"; # split-brain "/usr/lib/drbd/notify-split-brain.sh root"; # out-of-sync "/usr/lib/drbd/notify-out-of-sync.sh root"; # before-resync-target "/usr/lib/drbd/snapshot-resync-target-lvm.sh -p 15 -- -c 16k"; # after-resync-target /usr/lib/drbd/unsnapshot-resync-target-lvm.sh; } startup { # wfc-timeout degr-wfc-timeout outdated-wfc-timeout wait-after-sb become-primary-on both; wfc-timeout 30; degr-wfc-timeout 10; outdated-wfc-timeout 10; } options { # cpu-mask on-no-data-accessible } disk { # size max-bio-bvecs on-io-error fencing disk-barrier disk-flushes # disk-drain md-flushes resync-rate resync-after al-extents # c-plan-ahead c-delay-target c-fill-target c-max-rate # c-min-rate disk-timeout } net { # protocol timeout max-epoch-size max-buffers unplug-watermark # connect-int ping-int sndbuf-size rcvbuf-size ko-count # allow-two-primaries cram-hmac-alg shared-secret after-sb-0pri # after-sb-1pri after-sb-2pri always-asbp rr-conflict # ping-timeout data-integrity-alg tcp-cork on-congestion # congestion-fill congestion-extents csums-alg verify-alg # use-rle protocol C; allow-two-primaries yes; after-sb-0pri discard-zero-changes; after-sb-1pri discard-secondary; after-sb-2pri disconnect; } } cat /etc/drbd.d/storage.res resource storage { device /dev/drbd0; meta-disk internal; on host.structuralcomponents.net { address 10.10.1.120:7788; disk /dev/vg_storage/lv_storage; } on host2.structuralcomponents.net { address 10.10.1.121:7788; disk /dev/vg_storage/lv_storage; } /var/log/messages is not logging anything about the crash. I've been trying to find a cause of this but I've come up with nothing. Can anyone help me out? Thanks.

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  • Linux: Ways to communicate with kernel module from user space.

    - by Inso Reiges
    Hello, What are the ways to communicate with a kernel module from user space? By communication i mean sending information and commands between the module and a user space process. I currently know of two way: open/close/read/write/ioctl on published device node. read/write on exported and hooked /proc file. More specifically, can someone advice the best way to communicate with a kernel module that does not actually drives any hardware and therefore should not be littering /dev with stub nodes that exists solely for ioctl calls? I mostly need to check its various status variables and send it a block of data with a request type tag and see if the request succeeded. Inso.

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  • Intel Dual Band Wireless-AC 7260 keeps dropping wifi

    - by Rick T
    My wifi Intel Dual Band Wireless-AC 7260 keeps dropping wificonnection drops and the network to which I was connected disappears from the list of available networks in network manager. The only way to fix it is to disable wifi and re-enable it How can I fix this. I'm using ubuntu 14.04 64bit. It mostly drops connections on the 5ghz network. My other devices don't drop connections over wifi. see logs and versions rt@simon:~$ uname -a Linux simon 3.13.0-34-generic #60-Ubuntu SMP Wed Aug 13 15:45:27 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux rt@simon:~$ rt@simon:~$ dmesg | grep iwl [ 3.370777] iwlwifi 0000:03:00.0: irq 46 for MSI/MSI-X [ 3.381089] iwlwifi 0000:03:00.0: loaded firmware version 22.24.8.0 op_mode iwlmvm [ 3.414637] iwlwifi 0000:03:00.0: Detected Intel(R) Dual Band Wireless AC 7260, REV=0x144 [ 3.414695] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S [ 3.414913] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S [ 3.630208] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs' [ 9.304838] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S [ 9.305068] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S [ 605.483174] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S [ 605.483396] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S rt@simon:~$ cat /var/log/syslog | grep -e iwl -e 80211 | tail -n25 Aug 14 08:13:02 simon kernel: [ 3.452780] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) Aug 14 08:13:02 simon kernel: [ 3.630208] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs' Aug 14 08:13:06 simon NetworkManager[1125]: <info> rfkill1: found WiFi radio killswitch (at /sys/devices/pci0000:00/0000:00:1c.2/0000:03:00.0/ieee80211/phy0/rfkill1) (driver iwlwifi) Aug 14 08:13:06 simon NetworkManager[1125]: <info> (wlan0): using nl80211 for WiFi device control Aug 14 08:13:06 simon NetworkManager[1125]: <info> (wlan0): new 802.11 WiFi device (driver: 'iwlwifi' ifindex: 3) Aug 14 08:13:06 simon kernel: [ 9.304838] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S Aug 14 08:13:06 simon kernel: [ 9.305068] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S Aug 14 08:14:18 simon kernel: [ 81.230162] cfg80211: Calling CRDA to update world regulatory domain Aug 14 08:14:18 simon kernel: [ 81.232330] cfg80211: World regulatory domain updated: Aug 14 08:14:18 simon kernel: [ 81.232332] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) Aug 14 08:14:18 simon kernel: [ 81.232333] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) Aug 14 08:14:18 simon kernel: [ 81.232334] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) Aug 14 08:14:18 simon kernel: [ 81.232335] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) Aug 14 08:14:18 simon kernel: [ 81.232336] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) Aug 14 08:14:18 simon kernel: [ 81.232337] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) Aug 14 08:23:02 simon kernel: [ 605.483174] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S Aug 14 08:23:02 simon kernel: [ 605.483396] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S Aug 14 08:23:18 simon kernel: [ 621.223905] cfg80211: Calling CRDA to update world regulatory domain Aug 14 08:23:18 simon kernel: [ 621.228945] cfg80211: World regulatory domain updated: Aug 14 08:23:18 simon kernel: [ 621.228950] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) Aug 14 08:23:18 simon kernel: [ 621.228954] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) Aug 14 08:23:18 simon kernel: [ 621.228956] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) Aug 14 08:23:18 simon kernel: [ 621.228959] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) Aug 14 08:23:18 simon kernel: [ 621.228961] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) Aug 14 08:23:18 simon kernel: [ 621.228963] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)

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  • Start fail VMware-Player 3.1.5 on Ubuntu 12.04 32bit

    - by Chris Lee
    Install got no problem but at start of VMWare Player it want to compile and exit with this error: "Unable to build kernel module." Thats the log: Jun 05 00:03:36.153: app-3075712704| Log for VMware Workstation pid=3709 version=7.1.5 build=build-491717 option=Release Jun 05 00:03:36.153: app-3075712704| The process is 32-bit. Jun 05 00:03:36.153: app-3075712704| Host codepage=UTF-8 encoding=UTF-8 Jun 05 00:03:36.153: app-3075712704| Logging to /tmp/vmware-root/setup-3709.log Jun 05 00:03:36.284: app-3075712704| modconf query interface initialized Jun 05 00:03:36.284: app-3075712704| modconf library initialized Jun 05 00:03:36.336: app-3075712704| Your GCC version: 4.6 Jun 05 00:03:36.350: app-3075712704| Your GCC version: 4.6 Jun 05 00:03:36.371: app-3075712704| Your GCC version: 4.6 Jun 05 00:03:36.417: app-3075712704| Your GCC version: 4.6 Jun 05 00:03:36.429: app-3075712704| Your GCC version: 4.6 Jun 05 00:03:36.521: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:36.526: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:36.529: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:36.533: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:36.536: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:36.579: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:36.583: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:36.586: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:36.589: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:36.593: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:36.602: app-3075712704| Your GCC version: 4.6 Jun 05 00:03:36.624: app-3075712704| Your GCC version: 4.6 Jun 05 00:03:39.677: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:39.689: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:39.694: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:39.697: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:39.701: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:39.711: app-3075712704| Your GCC version: 4.6 Jun 05 00:03:39.733: app-3075712704| Your GCC version: 4.6 Jun 05 00:03:39.854: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:39.858: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:39.862: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:39.865: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:39.868: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:40.065: app-3075712704| Trying to find a suitable PBM set for kernel 3.2.0-24-generic-pae. Jun 05 00:03:40.066: app-3075712704| Building module vmmon. Jun 05 00:03:40.066: app-3075712704| Extracting the sources of the vmmon module. Jun 05 00:03:40.075: app-3075712704| Building module with command: /usr/bin/make -C /tmp/vmware-root/modules/vmmon-only auto-build SUPPORT_SMP=1 HEADER_DIR=/lib/modules/3.2.0-24-generic-pae/build/include CC=/usr/bin/gcc GREP=/usr/bin/make IS_GCC_3=no VMCCVER=4.6 Jun 05 00:03:42.016: app-3075712704| Failed to compile module vmmon! Is it a gcc problem ?

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  • How to approach ninject container/kernel in inheritance situation

    - by Bas
    I have the following situation: class RuleEngine {} abstract class RuleImplementation {} class RootRule : RuleImplementation {} class Rule1 : RuleImplementation {} class Rule2 : RuleImplementation {} The RuleEngine is injected by Ninject and has a kernel at it's disposal, the role of the RuleEngine is to fire off the root rule, which on it's turn will load all the other rules also using Ninject, but using a different Module and creating a new Kernel. Now my question is, some of the rules require some dependencies which I want to inject using Ninject. What would be the best way to create the kernel for these rules and also still do proper unit testing with it? (the kernel shouldn't become a real pain in my tests) I've been thinking of the following possibilitys: The kernel that I use in the RuleEngine class could be tossed around to RuleImplementation and thus be available for every rule. But tossing around Kernels isn't really something I wish to do. When creating the rules, I could give the kernel (which creates the rules) as a constructor argument for each rule. I could create a method inside the RuleImplementation which creates a kernel and makes it possible for the rules to retrieve the kernel using a get() in the abstract class Whats the convention of passing around/creating kernels? Just create new kernels, or reuse them?

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  • Oracle Unbreakable Enterprise Kernel and Emulex HBA Eliminate Silent Data Corruption

    - by sergio.leunissen
    Yesterday, Emulex announced that it has added support for T10 Protection Information (T10-PI), formerly called T10-DIF, to a number of its HBAs. When used with Oracle's Unbreakable Enterprise Kernel, this will prevent silent data corruption and help ensure the integrity and regulatory compliance of user data as it is transferred from the application to the SAN From the press release: Traditionally, protecting the integrity of customers' data has been done with multiple discrete solutions, including Error Correcting Code (ECC) and Cyclic Redundancy Check (CRC), but there have been coverage gaps across the I/O path from the operating system to the storage. The implementation of the T10-PI standard via Emulex's BlockGuard feature, in conjunction with other industry player's implementations, ensures that data is validated as it moves through the data path, from the application, to the HBA, to storage, enabling seamless end-to-end integrity. Read the white paper and don't miss the live webcast on eliminating silent data corruption on December 16th!

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