Re: kernel BUG at filemap.c:843!

From: James Lee (jlee@canada.com)
Date: Mon Aug 12 2002 - 01:40:03 EST

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In reply to: Dagfinn Ilmari Mannsåker: "kernel BUG at filemap.c:843!"
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Hi,

I'm also having the exactly same problem.
Tested with 2.4.19-xfs(checked out from SGI's CVS on Aug 10) on Redhat 7.2.
Kernel and userland tools are compiled with gcc 2.91.66
The following is the result of some tests:

scsidisks -> xfs: OK
scsidisks -> raid5 -> xfs: OK
scsidisks -> lvm -> xfs: OK
scsidisks -> raid0 -> lvm -> xfs: OK
scsidisks -> raid1 -> lvm -> xfs: OK
scsidisks -> raid5 -> lvm -> xfs: kernel BUG at filemap.c:843!

This problem is always reproducible with the following shell script:

        #!/bin/sh
        mkraid /dev/md0
        vgcreate VolumeGroup /dev/md0
        lvcreate -L1G -nTestVolume VolumeGroup
        mkfs.xfs -f -d size=32m /dev/VolumeGroup/TestVolume
        mount -t xfs /dev/VolumeGroup/TestVolume
/mnt -onoatime,nodiratime,usrquota,grpquota

Whenever I run the above script, mount command always generates kernel oops.
But, if I insert some delay as of the following, then mount goes well:

        #!/bin/sh
        mkraid /dev/md0
        vgcreate VolumeGroup /dev/md0
        lvcreate -L1G -nTestVolume VolumeGroup
        mkfs.xfs -f -d size=32m /dev/VolumeGroup/TestVolume
        sleep 1
        mount -t xfs /dev/VolumeGroup/TestVolume
/mnt -onoatime,nodiratime,usrquota,grpquota

JLee

----- Original Message -----
From: "Dagfinn Ilmari Manns?er" <ilmari@ping.uio.no>
To: <linux-kernel@vger.kernel.org>; <linux-xfs@oss.sgi.com>
Sent: Sunday, August 11, 2002 8:27 PM
Subject: kernel BUG at filemap.c:843!

> Hi,
>
> I have been bitten a few times by the BUG() in unlock_page(), both
> with 2.4.19-rc3-xfs and 2.4.19-xfs (the latter checked out from SGI's
> CVS on Aug 10). The system is SCSI-only, with a raid5 array as an LVM
> physical volume and XFS on all the volumes.
>
> Software-wise it's Debian Woody, but the kernel is compiled on a Sid
> box with gcc 2.95.4-16.
>
> Attached are the decoded oops, the module list and the config.
>
> --
> ilmari
>
>

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Next message: Carlos Laviola: "Change in USB (HID?) from 2.4.18 to 2.4.19 breaks support for my Joystick"
Previous message: Andrew Morton: "Re: [patch 6/12] hold atomic kmaps across generic_file_read"
In reply to: Dagfinn Ilmari Mannsåker: "kernel BUG at filemap.c:843!"
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