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Subject: Re: [Kernel 2.5] Qlogic 2x00 driver
From: GrandMasterLee <masterlee@digitalroadkill.net>
To: Michael Clark <michael@metaparadigm.com>
Cc: Simon Roscic <simon.roscic@chello.at>, linux-kernel@vger.kernel.org
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On Wed, 2002-10-16 at 11:49, Michael Clark wrote:
> On 10/17/02 00:28, Simon Roscic wrote:
> 
> >>This was happening in pretty much all kernels I tried (a variety of
> >>redhat kernels and aa kernels). Removing LVM has solved the problem.
> >>Although i was blaming LVM - maybe it was a buffer overflow in qla driver.
> > 
> > looks like i had a lot of luck, because my 3 servers wich are using the
> > qla2x00 5.36.3 driver were running without problems, but i'll update to 6.01
> > in the next few day's.
> > 
> > i don't use lvm, the filesystem i use is xfs, so it smells like i had a lot of luck for 
> > not running into this problem, ...

So then, it seems that LVM is adding stress to the system in a way that
is bad for the kernel. Perhaps the read-ahead in conjunction with the
large buffers from XFS, plus the amount of volumes we run(22 on the
latest machine to crash).

> Seems to be the correlation so far. qlogic driver without lvm works okay.
> qlogic driver with lvm, oopsorama.

Michael, what exactly do your servers do? Are they DB servers with ~1Tb
connected, or file-servers with hundreds of gigs, etc?

> ~mc
> 
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