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

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Message-Id: <1184628395.8707.15.camel@segv.aura.of.mankind>
Date:	Tue, 17 Jul 2007 01:26:35 +0200
From:	utz lehmann <lkml123@...4n2c.de>
To:	Rene Herman <rene.herman@...il.com>
Cc:	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...?

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.

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

utz


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