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Re: XFS internal error xfs_da_do_buf(1) at line 1992 of file fs/xfs/xfs

To: Eric Sandeen <sandeen@xxxxxxxxxxx>
Subject: Re: XFS internal error xfs_da_do_buf(1) at line 1992 of file fs/xfs/xfs_da_btree.c
From: Amit Sahrawat <amit.sahrawat83@xxxxxxxxx>
Date: Sat, 24 Oct 2009 13:58:02 +0530
Cc: xfs@xxxxxxxxxxx
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Hi Eric,
 
Can this issue be related to some timing issue/synchronization with disk?
Test case is something like this..
 
I create thousands of files... (simply keep touching to create '0' bytes files from a shell script) and in between I do Ctrl + C, to stop.
Then, I issue command to remove files (rm -rf *) and crash appears. 
 
Thanks & Regards,
Amit Sahrawat

On Fri, Oct 23, 2009 at 8:07 AM, Eric Sandeen <sandeen@xxxxxxxxxxx> wrote:
Amit Sahrawat wrote:
that means it highely unlikey to get a fix for this issue :(
 Yes, backporting just doest not suits for me.
 I am trying to dig into the code, but really dont know if that's going to be that easy.
 Thanks Eric for all the help.
W'll you know if I am able to fix this.

One other thought on the backporting side; RHEL5.4 now has xfs merged into a 2.6.18-ish kernel.  There are still some other supporting bits in that kernel, it's hardly vanilla 2.6.18, but if you want to try a backport route it might be one option.

Testing an upstream kernel w/ your testcase in an emulator would also be a reasonable thing to do, I think.

-eric

Thanks & Regards,
Amit Sahrawat


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