linux-kernel - Re: [PATCH][RFC] 4K stacks default, not a debug thing any more...?

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Message-ID: <18076.54789.359986.788880@stoffel.org>
Date:	Tue, 17 Jul 2007 10:45:25 -0400
From:	"John Stoffel" <john@...ffel.org>
To:	utz lehmann <lkml123@...4n2c.de>
Cc:	Rene Herman <rene.herman@...il.com>, Bodo Eggert <7eggert@....de>,
	Matt Mackall <mpm@...enic.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Jesper Juhl <jesper.juhl@...il.com>,
	Ray Lee <ray-lk@...rabbit.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	William Lee Irwin III <wli@...omorphy.com>
Subject: Re: [PATCH][RFC] 4K stacks default, not a debug thing any more...?


utz> On Tue, 2007-07-17 at 00:28 +0200, Rene Herman wrote:
>> Given that as Arjan stated Fedora and even RHEL have been using 4K stacks 
>> for some time now, and certainly the latter being a distribution which I 
>> would expect to both host a relatively large number of lvm/md/xfs and what 
>> stackeaters have you users and to be fairly conservative with respect to the 
>> chances of scribbling over kernel memory (I'm a trusting person...) it seems 
>> there might at this stage only be very few offenders left.

utz> I have to recompile the fedora kernel rpms (fc6, f7) with 8k
utz> stacks on my i686 server. It's using NFS -> XFS -> DM -> MD
utz> (raid1) -> IDE disks.  With 4k stacks it crash (hang) within
utz> minutes after using NFS.  With 8k stacks it's rock solid. No
utz> crashes within months.

Does it give any useful information when it does crash?  Can you make
a simple test case using ram disks instead of IDE disks and then
building upon that?  

I think I should try to do this myself at some point...

John
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