On Wed, 2007-03-07 at 11:45 -0800, Andrew Morton wrote: > On Wed, 7 Mar 2007 18:09:55 +0100 Andre Noll <maan@xxxxxxxxxxxxxxx> wrote: > > > On 20:39, Andrew Morton wrote: > > > On Wed, 28 Feb 2007 16:37:22 +0100 Andre Noll <maan@xxxxxxxxxxxxxxx> wrote: > > > > > > > On 16:18, Andre Noll wrote: > > > > > > > > > With 2.6.21-rc2 I am unable to reproduce this BUG message. However, > > > > > writing to both raid systems at the same time via lvm still locks up > > > > > the system within minutes. > > > > > > > > Screenshot of the resulting kernel panic: > > > > > > > > http://systemlinux.org/~maan/shots/kernel-panic-21-rc2-huangho2.png > > > > > > > > > > It died in CFQ. Please try a different IO scheduler. Use something > > > like > > > > > > echo deadline > /sys/block/sda/queue/scheduler > > > > > > This could still be the old qla2xxx bug, or it could be a new qla2xxx bug, > > > or it could be a block bug, or it could be an LVM bug. > > > > OK. I'm running with deadline right now. But I guess this kernel > > panic was caused by an LVM bug because lockdep reported problems with > > LVM. Nobody responded to my bug report on the LVM mailing list (see > > http://www.redhat.com/archives/linux-lvm/2007-February/msg00102.html). > > > > Non-working snapshots and no help from the mailing list convinced me > > to ditch the lvm setup [1] in favour of linear software raid. This > > means I can't do lvm-related tests any more. > > Sigh. > > > BTW: Are ext3 filesystem sizes greater than 8T now officially > > supported? > > I think so, but I don't know how much 16TB testing developers and > distros are doing - perhaps the linux-ext4 denizens can tell us? > - IBM has done some testing (dbench, fsstress, fsx, tiobench, iozone etc) on 10TB ext3, I think RedHat and BULL have done similar test on >8TB ext3 too. Mingming - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
