lkml.org 
[lkml]   [2011]   [Mar]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Bug at for-2.6.39/core
On 2011-03-29 11:47, Gui Jianfeng wrote:
> Hi Jens,
>
> I trigger an OOPS when testing, the following script can reproduce
> this bug on my box.
>
> #!/bin/sh
>
> mkdir /mnt/blkio
> mount -t cgroup -o blkio blkio /mnt/blkio/
> mkdir /mnt/blkio/test1 /mnt/blkio/test2
> echo noop > /sys/block/sdb/queue/scheduler
> dd iflag=direct if=/dev/sdb of=/dev/null bs=4k &
> echo $! > /mnt/blkio/test1/tasks
> dd iflag=direct if=/dev/sdb of=/dev/null bs=4k &
> echo $! > /mnt/blkio/test2/tasks
> sleep 3
> echo cfq > /sys/block/sdb/queue/scheduler
>
> ----
> eBUG: unable to handle kernel NULL pointer dereference at 0000000000000008
> IP: [<ffffffff812200e8>] cfq_completed_request+0x38/0x7f0

This is a known bug, update to Linus' current -git and it's fixed.

--
Jens Axboe



\
 
 \ /
  Last update: 2011-03-29 11:53    [W:0.041 / U:0.364 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site