linux-kernel - Re: [XFS] 2.6.29-rc2: XFS internal error XFS_WANT_CORRUPTED

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Date:	Tue, 20 Jan 2009 07:13:35 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	Jacek Luczak <difrost.kernel@...il.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Eric Sandeen <sandeen@...deen.net>,
	LKML <linux-kernel@...r.kernel.org>,
	xfs mailing list <xfs@....sgi.com>,
	Dave Chinner <david@...morbit.com>
Subject: Re: [XFS] 2.6.29-rc2: XFS internal error XFS_WANT_CORRUPTED_GOTO

On Tue, Jan 20, 2009 at 06:49:06AM -0500, Christoph Hellwig wrote:
> > > Just curious:  do you have CONFIG_LBD set?
> > > 
> > Hi Christoph,
> > 
> > the answer is:
> > $ grep LBD .config
> > # CONFIG_LBD is not set
> 
> Ok, let me reproduce it without that set..

Ok, on 32-bit x86 without CONFIG_LBD I can reliably reproduce the issue
with the following script:


#!/bin/bash

TESTDIR=/mnt/test
SCRATCHMNT=/mnt/scratch
file=$SCRATCHMNT/f

do_pwrite()
{
	offset=`expr $1 \* 512`
	end=`expr $2 \* 512`
	length=`expr $end - $offset`

	xfs_io -d -f $file -c "pwrite $offset $length" >/dev/null
}


mkfs.xfs \
	-b size=1024 \
	-d file,name=$TESTDIR/fsfile,size=40146592b,agcount=16 \
	-i attr=0 \
	-l version=1

mount -o loop,rw,noatime,nodiratime $TESTDIR/fsfile $SCRATCHMNT

do_pwrite 30792 31039
do_pwrite 30320 30791
do_pwrite 29688 30319
do_pwrite 29536 29687
do_pwrite 27216 29535
do_pwrite 24368 27215
do_pwrite 21616 24367
do_pwrite 20608 21615
do_pwrite 19680 20607
do_pwrite 19232 19679
do_pwrite 17840 19231
do_pwrite 16928 17839
do_pwrite 15168 16927
do_pwrite 14048 15167
do_pwrite 12152 14047
do_pwrite 11344 12151
do_pwrite 8792 11343
do_pwrite 6456 8791
do_pwrite 5000 6455
do_pwrite 1728 4999
do_pwrite 0 1727

sync
sync

> $SCRATCHMNT/bigfile

#umount $SCRATCH
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