http://oss.sgi.com/bugzilla/show_bug.cgi?id=182
Summary: Hitting the BUG() in filemap.c:843 (in unlock_page())
Product: Linux XFS
Version: 1.1.x
Platform: IA32
OS/Version: Linux
Status: NEW
Severity: critical
Priority: High
Component: XFS kernel code
AssignedTo: xfs-master@xxxxxxxxxxx
ReportedBy: luben@xxxxxxxxxxxx
If this is a userspace bug, what version of the package are you using:
xfs 1.1 for 2.4.19 generated on 2002-09-27 4:22 UTC
What kernel are you using: 2.4.19 stock
Where did the XFS code come from? (CVS, Linus, your distribution, etc):
ftp://oss.sgi.com/projects/xfs/download/patches/2.4.19/xfs-2.4.19-all-i386.bz2
Description of Problem:
We have this scenario:
xfs -> vg (simplest setup, LVM) -> md (raid5) -> SCSI LLDD.
When md is set up with 3 (odd #) devices, then
a mount sleeps indefinitely on down(), and when
md is set up with 4 devices, then the kernel
oopses at filemap.c:843 in unlock_page() the BUG()
statement.
For the complete story please see the linux-xfs mailing list
and the message with title: Re: hitting the BUG() in filemap.c:843 (in
unlock_page()), dated Wed, 16 Oct 2002 21:05:45 -0400.
How Reproducible: set up md in raid 5, no spares, block size 64,
4 devices to hit BUG(), 3 devices to sleep indefinitely,
make a single lv/vg on top of the md device and try to mount it
with xfs, options: onoatime,nodiratime,usrquota,grpquota.
Please see the mailing list for the scripts and all the parameters.
Steps to Reproduce: Please see above.
1.
2.
3.
Actual Results: hitting the BUG() in filemap.c:843 or sleeping
indefinitely -- 4 or 3 disks in md resepectively.
Expected Results: sucessful mount!
Additional Information:
Please see the linux-xfs mailing list at the message indicated
above where I've included the exact (!) parameters of the
raid array, the vg/lv and the xfs mount.
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