Re: need help how to debug xfs crash issue xfs_iunlink_remove: xfs_inotobp() returned error 22

From: Brian Foster <bfoster@redhat.com>
To: 符永涛 <yongtaofu@gmail.com>
Cc: Ben Myers <bpm@sgi.com>, Eric Sandeen <sandeen@sandeen.net>,
	"xfs@oss.sgi.com" <xfs@oss.sgi.com>
Subject: Re: need help how to debug xfs crash issue xfs_iunlink_remove: xfs_inotobp() returned error 22
Date: Fri, 12 Apr 2013 08:41:27 -0400	[thread overview]
Message-ID: <516800F7.80502@redhat.com> (raw)
In-Reply-To: <CADFMGuJoar_uKB_Lrq0nKFsbdjyZWFaHXU-ni2ky3sToSQwUSQ@mail.gmail.com>

On 04/12/2013 04:32 AM, 符永涛 wrote:
> Dear xfs experts,
> Can I just call xfs_stack_trace(); in the second line of
> xfs_do_force_shutdown() to print stack and rebuild kernel to check
> what's the error?
> 

I suppose that's a start. If you're willing/able to create and run a
modified kernel for the purpose of collecting more debug info, perhaps
we can get a bit more creative in collecting more data on the problem
(but a stack trace there is a good start).

BTW- you might want to place the call after the XFS_FORCED_SHUTDOWN(mp)
check almost halfway into the function to avoid duplicate messages.

Brian

> 
> 2013/4/12 符永涛 <yongtaofu@gmail.com <mailto:yongtaofu@gmail.com>>
> 
>     Hi Brian,
>     What else I'm missing? Thank you.
>     stap -e 'probe module("xfs").function("xfs_iunlink"){}'
> 
>     WARNING: cannot find module xfs debuginfo: No DWARF information found
>     semantic error: no match while resolving probe point
>     module("xfs").function("xfs_iunlink")
>     Pass 2: analysis failed.  Try again with another '--vp 01' option.
> 
> 
>     2013/4/12 符永涛 <yongtaofu@gmail.com <mailto:yongtaofu@gmail.com>>
> 
>         ls -l
>         /usr/lib/debug/lib/modules/2.6.32-279.el6.x86_64/kernel/fs/xfs/xfs.ko.debug
>         -r--r--r-- 1 root root 21393024 Apr 12 12:08
>         /usr/lib/debug/lib/modules/2.6.32-279.el6.x86_64/kernel/fs/xfs/xfs.ko.debug
> 
>         rpm -qa|grep  kernel
>         kernel-headers-2.6.32-279.el6.x86_64
>         kernel-devel-2.6.32-279.el6.x86_64
>         kernel-2.6.32-358.el6.x86_64
>         kernel-debuginfo-common-x86_64-2.6.32-279.el6.x86_64
>         abrt-addon-kerneloops-2.0.8-6.el6.x86_64
>         kernel-firmware-2.6.32-358.el6.noarch
>         kernel-debug-2.6.32-358.el6.x86_64
>         kernel-debuginfo-2.6.32-279.el6.x86_64
>         dracut-kernel-004-283.el6.noarch
>         libreport-plugin-kerneloops-2.0.9-5.el6.x86_64
>         kernel-devel-2.6.32-358.el6.x86_64
>         kernel-2.6.32-279.el6.x86_64
> 
>         rpm -q kernel-debuginfo
>         kernel-debuginfo-2.6.32-279.el6.x86_64
> 
>         rpm -q kernel
>         kernel-2.6.32-279.el6.x86_64
>         kernel-2.6.32-358.el6.x86_64
> 
>         do I need to re probe it?
> 
> 
>         2013/4/12 Eric Sandeen <sandeen@sandeen.net
>         <mailto:sandeen@sandeen.net>>
> 
>             On 4/11/13 11:32 PM, 符永涛 wrote:
>             > Hi Brian,
>             > Sorry but when I execute the script it says:
>             > WARNING: cannot find module xfs debuginfo: No DWARF
>             information found
>             > semantic error: no match while resolving probe point
>             module("xfs").function("xfs_iunlink")
>             >
>             > uname -a
>             > 2.6.32-279.el6.x86_64
>             > kernel debuginfo has been installed.
>             >
>             > Where can I find the correct xfs debuginfo?
> 
>             it should be in the kernel-debuginfo rpm (of the same
>             version/release as the kernel rpm you're running)
> 
>             You should have:
> 
>             /usr/lib/debug/lib/modules/2.6.32-279.el6.x86_64/kernel/fs/xfs/xfs.ko.debug
> 
>             If not, can you show:
> 
>             # uname -a
>             # rpm -q kernel
>             # rpm -q kernel-debuginfo
> 
>             -Eric
> 
> 
> 
> 
> 
>         -- 
>         符永涛
> 
> 
> 
> 
>     -- 
>     符永涛
> 
> 
> 
> 
> -- 
> 符永涛
> 
> 
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