Re: postgresql activity causes crash, 2.6.36.1

[Chris Mason <chris.mason@oracle.com>]

Excerpts from Brian Neu's message of 2010-11-06 21:08:59 -0400:
> After a successful db startup, this crash was reproducible every time with db 
> activity, or possibly just time.  The filesystem is a raid1 and even after a 
> reformat and restore from backup, the crash remains:
> 
> Label: slash  uuid: a9730db3-a475-45bb-af94-a873e235114b
>         Total devices 2 FS bytes used 39.04GB
>         devid    2 size 97.66GB used 48.51GB path /dev/sdb2
>         devid    1 size 97.66GB used 48.53GB path /dev/sda2
> 
> mounted as:
> # mount |grep sdb2
> /dev/sdb2 on / type btrfs (rw,noatime)
> 
> 
> 
> This is transcribed from the screen, so forgive type-o's and "<blah>"  .    Let 
> me know if I skipped something important.

Ok, could you please take a picture of the crash?  We'll need all the
lines.

Which kernel are you on?

-chris

> (every line starts with [27163.079010] )
> 
> Call trace:
> __btrfs_submit_bio_done+0x1b/0x1d [btrfs]
> run_one_async_done+0x94/0x98 [btrfs]
> run_ordered_completions++0x78/0xaa [btrfs]
> worker_loop+0x199/0x4ec [btrfs]
> kthread+0x0d/0xa5
> kernel_thread_helper+0x4/0x10
> ? restore_args+0x0/0x30
> ? kthread+0x0/0xa5
> ? kernel_thread_helper+0x0/0x10
> Code: 74 04 <blah blah>
> RIP [<ffff<blah> 7>] btrfs_map_bio+0x88/0x1c9
> RSP <ffb<blah>>
> ---[ end trace f8<blah> ]---
>