linux-kernel - Re: [PATCH] Restrict stack space reservation to rlimit

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Message-ID: <20100208051104.GL32246@kryten>
Date:	Mon, 8 Feb 2010 16:11:04 +1100
From:	Anton Blanchard <anton@...ba.org>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	Michael Neuling <mikey@...ling.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Oleg Nesterov <oleg@...hat.com>,
	James Morris <jmorris@...ei.org>, Ingo Molnar <mingo@...e.hu>,
	linux-fsdevel@...r.kernel.org, stable@...nel.org,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	Serge Hallyn <serue@...ibm.com>,
	WANG Cong <xiyou.wangcong@...il.com>,
	Paul Mackerras <paulus@...ba.org>, benh@...nel.crashing.org,
	miltonm@....com, aeb@....nl
Subject: Re: [PATCH] Restrict stack space reservation to rlimit

 
Hi,

> Why do we need page size independent stack size? It seems to have
> compatibility breaking risk.

I don't think so. The current behaviour is clearly wrong, we dont need a
16x larger stack just because you went from a 4kB to a 64kB base page
size. The user application stack usage is the same in both cases.

Anton
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