[Linux-cachefs] kernel BUG at fs/fscache/operation.c:384!

Fri May 9 17:38:18 UTC 2014

Hi Milosz, 

The patch provided in
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1b
b4b7f98f361132ea322834515334d95b93c184  seems applied already in my current
kernel version (2.6.32-431.11.2.el6.x86_64). I checked the kernel source and
I am seeing those my /include/linux/fscache-cache.h and /fs/fscache/page.c .
I attached both files from the kernel source.  

I notice there seems a recent release of kernel for centos 6.5
(2.6.32-431.17.1.el6.x86_64 release last April 16th). I will install that
update and let you know if issue still persist. Let me know if you have
other suggestions. 

Thanks, 
Fernando

-----Original Message-----
From: linux-cachefs-bounces at redhat.com
[mailto:linux-cachefs-bounces at redhat.com] On Behalf Of Fernando Santos
Sent: Friday, May 09, 2014 8:19 AM
To: 'Milosz Tanski'
Cc: linux-cachefs at redhat.com
Subject: Re: [Linux-cachefs] kernel BUG at fs/fscache/operation.c:384!

Thanks Milosz, I will test and check if I can apply the patch in my current
kernel - 2.6.32-431.11.2.el6.x86_64 Upgrading the kernel to 3.x currently
not an option for my systems since some does not work in kernel 3.x.  

Regards,
Fernando

-----Original Message-----
From: Milosz Tanski [mailto:milosz at adfin.com]
Sent: Friday, May 09, 2014 8:11 AM
To: Fernando Santos
Cc: linux-cachefs at redhat.com
Subject: Re: [Linux-cachefs] kernel BUG at fs/fscache/operation.c:384!

Fernando,

I think that's a bug that's been fixed in the upstream kernel.
Somewhere around the time of ~ 3.10. Here's the link to the fix:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1b
b4b7f98f361132ea322834515334d95b93c184

On Fri, May 9, 2014 at 11:03 AM, Fernando Santos
<fernando.santos at hypermediasystems.com> wrote:
> Hi,
>
> It happens again twice already since I posted this bug (last May 3r 
> and today May 9th), and it seems the same error. So far no changes 
> were made in the system. Here is the summary of the crash report:
>
>       KERNEL:
/usr/lib/debug/lib/modules/2.6.32-431.11.2.el6.x86_64/vmlinux
>     DUMPFILE: vmcore [PARTIAL DUMP]
>         CPUS: 24
>         DATE: Fri May 9 14:10:00 2014
>       UPTIME: 6 days, 00:02:57
> LOAD AVERAGE: 0.45, 0.61, 0.64
>        TASKS: 697
>     NODENAME: web141.dl
>      RELEASE: 2.6.32-431.11.2.el6.x86_64
>      VERSION: 0000001 SMP Tue Mar 25 19:59:55 UTC 2014
>      MACHINE: x86_64 (2299 Mhz)
>       MEMORY: 48 GB
>        PANIC: "kernel BUG at fs/fscache/operation.c:385!"
>          PID: 100
>      COMMAND: "events/1"
>         TASK: ffff88067679aaa0 [THREAD_INFO: ffff8806767c2000]
>          CPU: 1
>        STATE: TASK_RUNNING (PANIC)
>
> Attached here is the back trace and logs for the latest crash. When 
> checking on last command, it always seems like it was rebooted on 
> purpose but nobody is logged in and no crons/script setup to reboot it:
>
> [root at web141.dl ~]# last | more
> root pts/1 inf001.dl Fri May 9 14:26 still logged in root pts/0 
> inf001.dl Fri May 9 14:23 still logged in reboot system boot 
> 2.6.32-431.11.2. Fri May 9 14:13 - 14:50 (00:36) root pts/0 inf001.dl 
> Thu May 8 21:19 - 23:48 (02:28) root pts/1 inf001.dl Thu May 8 15:26 -
> 16:08 (00:41) root pts/0 inf001.dl Wed May 7 18:46 - 18:46 (00:00) 
> root pts/1 inf001.dl Wed May 7 16:56 - 16:58 (00:01) root pts/1 
> inf001.dl Wed May 7 16:56 - 16:56 (00:00) root pts/2 inf001.dl Wed May
> 7 15:03 - 15:14 (00:10) root pts/1 inf001.dl Wed May 7 15:01 - 15:19
> (00:17) root pts/0 inf001.dl Wed May 7 13:57 - 13:57 (00:00) root
> pts/1 inf001.dl Tue May 6 22:01 - 22:05 (00:04) root pts/1 inf001.dl 
> Mon May 5 16:28 - 16:28 (00:00) root pts/0 inf001.dl Mon May 5 14:26 -
> 14:44 (00:18) reboot system boot 2.6.32-431.11.2. Sat May 3 14:06 -
> 14:50 (6+00:43) root pts/0 inf001.dl Thu May 1 22:08 - 23:15 (01:06)
>
> Please help in troubleshooting and let me know suggesting in resolving 
> the error.
>
> Thanks,
> Fernando
>
> --
> Linux-cachefs mailing list
> Linux-cachefs at redhat.com
> https://www.redhat.com/mailman/listinfo/linux-cachefs

--
Milosz Tanski
CTO
10 East 53rd Street, 37th floor
New York, NY 10022

p: 646-253-9055
e: milosz at adfin.com

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