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LVM+RAID5 Oops on snapshot creation

To: <linux-xfs@xxxxxxxxxxx>
Subject: LVM+RAID5 Oops on snapshot creation
From: Matteo Centonza <matteo@xxxxxx>
Date: Mon, 4 Jun 2001 11:55:51 +0200 (CEST)
Sender: owner-linux-xfs@xxxxxxxxxxx
Hi,

thanks again for this great filesystem. I'm running CVS code (2.4.5) as of
2001-05-30 patched with:

- VFS lock patch
- LVM 0.9.1beta7
- rw SNAPSHOT patch (Dale Stephenson, 2001-05-21)


I've also applied changes in lvm.c (get_hardsect_size). I'm running LVM
on top of RAID 5 array (XFS, no mkfs  options used, QUOTA enabled) of
three disks:

WDC AC36400L (6.4 Gb)
QUANTUM FIREBALL540A (540 Mb)
QUANTUM LP120A GM120A01X (120 Mb)

on a dual channel controller (ASUS P2B motherboard, Celeron).

The system seems to be very stable, even under heavy load, mixing local
and remote access, except for the snapshot that triggers the Oops in
attachment. This problem seems not to affect a bare LVM configuration.

I've also tested with ext2 and seems to run fine.

Hope this helps,

Ciao

-m









Attachment: lvm-snap.ksymoops
Description: Text document

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