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Date: Fri, 30 Mar 2012 17:44:04 -0500
From: Eric Sandeen <sandeen@sandeen.net>
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Subject: Re: XFS Kernel Panics in CentOS
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To: Mark Rechler <mrechler@brightcove.com>
Cc: xfs@oss.sgi.com

On 3/30/12 5:02 PM, Mark Rechler wrote:
> Hi Everyone,
> 
> We've been getting a lot of errors (across several kernels) and eventually a kernel panic. Any insight into these errors would be much appreciated.
> 
> Errors:
> Filesystem "dm-3": XFS internal error xfs_da_do_buf(2) at line 2112 of file fs/xfs/xfs_da_btree.c.  Caller 0xffffffff883c1826

Saying which CentOS it is would help ;)  And, standard disclaimers about how CentOS doesn't come with upstream _or_ distro support, etc etc...

But xfs_da_do_buf(2) indicates on-disk corruption, having encountered a bad magic number when reading from the disk.  Have you tried xfs_repair?

-Eric

> Call Trace:
>  [<ffffffff883c1725>] :xfs:xfs_da_do_buf+0x503/0x5b1
>  [<ffffffff883c1826>] :xfs:xfs_da_read_buf+0x16/0x1b
>  [<ffffffff883c1826>] :xfs:xfs_da_read_buf+0x16/0x1b
>  [<ffffffff883aeb71>] :xfs:xfs_attr_leaf_get+0x2e/0x99
>  [<ffffffff883aeb71>] :xfs:xfs_attr_leaf_get+0x2e/0x99
>  [<ffffffff883aec7f>] :xfs:xfs_attr_fetch+0xa3/0xd5
>  [<ffffffff883a7aa8>] :xfs:xfs_acl_iaccess+0x64/0xd4
>  [<ffffffff883f264a>] :xfs:xfs_check_acl+0x1b/0x2b
>  [<ffffffff8000f550>] generic_permission+0x40/0xca
>  [<ffffffff8000d902>] permission+0x81/0xc8
>  [<ffffffff8000999d>] __link_path_walk+0x173/0xf42
>  [<ffffffff8000e9cc>] link_path_walk+0x42/0xb2
>  [<ffffffff8000cc9c>] do_path_lookup+0x275/0x2f1
>  [<ffffffff8001278e>] getname+0x15b/0x1c2
>  [<ffffffff800236f6>] __user_walk_fd+0x37/0x4c
>  [<ffffffff8003f1f6>] vfs_lstat_fd+0x18/0x47
>  [<ffffffff8008c46e>] default_wake_function+0x0/0xe
>  [<ffffffff800efddf>] sys_lgetxattr+0x4e/0x5f
>  [<ffffffff8002a996>] sys_newlstat+0x19/0x31
>  [<ffffffff8005d229>] tracesys+0x71/0xe0
>  [<ffffffff8005d28d>] tracesys+0xd5/0xe0
> 
> Code: 0f b6 40 02 89 44 24 04 e9 95 00 00 00 44 0f b6 Z3 44 3b 65
> RIP [<ffffffffff8841bfaf>] :xfs:xfs_attr_shortform_getvalue+0x24/0xe2
>   RSP <ffff81020752dbc8>
> CR2: 00000000000002
>   <0>Kernel panic - not syncing: Fatal exception
> 
> Thanks,
> Mark
> 
> 
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