Bug 236301
| Summary: | rmmod netconsole module hangs with 100% CPU | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | David Rees <drees76> |
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Brian Brock <bbrock> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 6 | CC: | jmoyer, jonstanley, zoli |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | kernel-2.6.23.9-85.fc8 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2008-01-10 06:44:52 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | |||
| Bug Blocks: | 427887 | ||
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Description
David Rees
2007-04-12 22:31:25 UTC
Hello, I wonder is there any development here? It passed almost a year and the bug still exists. If the netconsole service is enabled it is not possible to halt/reboot the box. root 5324 0.0 0.1 4648 1220 pts/1 S+ 04:27 0:00 | \_ /bin/sh /sbin/service netconsole stop root 5331 0.0 0.1 4700 1284 pts/1 S+ 04:27 0:00 | \_ /bin/bash /etc/init.d/netconsole stop root 5341 94.5 0.0 1716 448 pts/1 R+ 04:27 2:39 | \_ rmmod netconsole # uname -r 2.6.21-1.3194.fc7 Thank you in advance. Regards, Z (This is a mass-update to all current FC6 kernel bugs in NEW state) Hello, I'm reviewing this bug list as part of the kernel bug triage project, an attempt to isolate current bugs in the Fedora kernel. http://fedoraproject.org/wiki/KernelBugTriage I am CC'ing myself to this bug, however this version of Fedora is no longer maintained. Please attempt to reproduce this bug with a current version of Fedora (presently Fedora 8). If the bug no longer exists, please close the bug or I'll do so in a few days if there is no further information lodged. Thanks for using Fedora! Hello, I confirm that this ug is reproducible on: # uname -a Linux gate.polarhome.com 2.6.21-1.3194.fc7 #1 SMP Wed May 23 22:35:01 EDT 2007 i686 i686 i386 GNU/Linux # cat /etc/fedora-release Fedora release 8 (Werewolf) Thank you. Hmmm, you have a most interesting system. An F7 kernel on a (purportedly) F8 system? How did you upgrade? The kernel that you are running is the GA version from F7 anyways, which is over 6 months old at this point. Please try upgrading to at least 2.6.23.9-85.fc8 and attempt to reproduce. I could not reproduce this on that kernel, but I also do not have a valid netconsole setup - I just loaded it up with some dummy values and unloaded it (which worked fine). [root@dhcp-126 ~]# modprobe netconsole netconsole=192.168.1.3 [root@dhcp-126 ~]# lsmod | fgrep netconsole netconsole 6881 0 [root@dhcp-126 ~]# rmmod netconsole [root@dhcp-126 ~]# lsmod | fgrep netconsole [root@dhcp-126 ~]# uname -a Linux dhcp-126 2.6.23.9-85.fc8 #1 SMP Fri Dec 7 15:49:59 EST 2007 i686 i686 i386 GNU/Linux There were a bunch of changes to the workqueue cancellation code that may have fixed this problem. I was unable to reproduce it on 2.6.24-rc7; sorry, I don't have an f8 box handy for testing. Reproducing the bug likely requires a working netconsole configuration (something that is quite easily achieved). I tried to reproduce (as I said, on 2.6.24) using a while loop that issued sysrq-t's while another loop insmod/rmmod'd the netconsole module. Could the reporter please upgrade his kernel and try again (as suggested by Jon)? I can no longer reproduce this on Fedora 8 using kernel-2.6.23.9-85.fc8. This bug should be safe to close. |