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From: Andreas Dilger <adilger@clusterfs.com>
Date: Tue, 15 Oct 2002 23:40:35 -0600
To: Michael Clark <michael@metaparadigm.com>
Cc: J Sloan <joe@tmsusa.com>, GrandMasterLee <masterlee@digitalroadkill.net>,
       Simon Roscic <simon.roscic@chello.at>,
       Arjan van de Ven <arjanv@redhat.com>, linux-kernel@vger.kernel.org
Subject: Re: [Kernel 2.5] Qlogic 2x00 driver
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On Oct 16, 2002  13:28 +0800, Michael Clark wrote:
> Every one i was getting oops when used with a combination
> of ext3, LVM1 and qla2x00 driver.
> 
> Since taking LVM1 out of the picture, my oopsing problem has
> gone away. This could of course not be LVM1's fault but the
> fact that qla driver is a stack hog or something - i don't have
> enough information to draw any conclusions all at the moment
> i'm too scared to try LVM again (plus the time it takes to
> migrate a few hundred gigs of storage).

Yes, we have seen that ext3 is a stack hog in some cases, and I
know there were some fixes in later LVM versions to remove some
huge stack allocations.  Arjan also reported stack problems with
qla2x00, so it is not a surprise that the combination causes
problems.

In 2.5 there is the "4k IRQ stack" patch floating around, which
would avoid these problems.

Cheers, Andreas
--
Andreas Dilger
http://www-mddsp.enel.ucalgary.ca/People/adilger/
http://sourceforge.net/projects/ext2resize/

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