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Re: need help how to debug xfs crash issue xfs_iunlink_remove: xfs_inoto

To: çææ <yongtaofu@xxxxxxxxx>
Subject: Re: need help how to debug xfs crash issue xfs_iunlink_remove: xfs_inotobp() returned error 22
From: Brian Foster <bfoster@xxxxxxxxxx>
Date: Fri, 12 Apr 2013 08:41:27 -0400
Cc: Eric Sandeen <sandeen@xxxxxxxxxxx>, Ben Myers <bpm@xxxxxxx>, "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <CADFMGuJoar_uKB_Lrq0nKFsbdjyZWFaHXU-ni2ky3sToSQwUSQ@xxxxxxxxxxxxxx>
References: <CADFMGuJm5bPPwbbUtYwrCVDL23KExJTw_-VRX2UEEdZjo+i5oA@xxxxxxxxxxxxxx> <CADFMGu+=MM2yc=_peboV7JTNJ8F05TJfexmEErzcf0D8mAWFRg@xxxxxxxxxxxxxx> <CADFMGuKqkPbpcU=taqjTR4sA3o=w1LLAnKoEuj=OhJqEbQVijw@xxxxxxxxxxxxxx> <20130409145238.GE22182@xxxxxxx> <CADFMGuJaiH0wuxOHrDjDn7qRVH+vQkLOOSPUyqSdXnLcS47t3w@xxxxxxxxxxxxxx> <CADFMGu+TdyjTjMTWMwpdHqmszhpCU162UA4Y-njARwSEjM1xNw@xxxxxxxxxxxxxx> <20130410121025.78a42b22@xxxxxxxxxxxxxxxxxxxx> <CADFMGu+yCg4ux0n6S98bqm_cXc=VCcijVBTqwRxvxmtKt_JO-A@xxxxxxxxxxxxxx> <CADFMGuLxgBFU=FUK94tPsCh+qxRW0rEELxSXYoMQLFJ1u3=q0Q@xxxxxxxxxxxxxx> <516746AC.3090808@xxxxxxxxxx> <CADFMGuK-tJQFQzN9wN0LiWWj6SY4tg_c0W9dJadctg=ytegB+w@xxxxxxxxxxxxxx> <516798AE.9050908@xxxxxxxxxxx> <CADFMGuK67G85+J3LAjS=w_nkkSrj7At9HnPLSL-DBO6g0V=ThA@xxxxxxxxxxxxxx> <CADFMGuLNmSpA+e2Wo0qS5y2evQM=q_oVJJPf6kZkfAP4jfk=6w@xxxxxxxxxxxxxx> <CADFMGuJoar_uKB_Lrq0nKFsbdjyZWFaHXU-ni2ky3sToSQwUSQ@xxxxxxxxxxxxxx>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2
On 04/12/2013 04:32 AM, çææ 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 çææ <yongtaofu@xxxxxxxxx <mailto:yongtaofu@xxxxxxxxx>>
> 
>     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 çææ <yongtaofu@xxxxxxxxx <mailto:yongtaofu@xxxxxxxxx>>
> 
>         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@xxxxxxxxxxx
>         <mailto:sandeen@xxxxxxxxxxx>>
> 
>             On 4/11/13 11:32 PM, çææ 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
> 
> 
> 
> 
> 
>         -- 
>         çææ
> 
> 
> 
> 
>     -- 
>     çææ
> 
> 
> 
> 
> -- 
> çææ
> 
> 
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