From: Andrew Morton <akpm@osdl.org>
Date: Fri, 24 Mar 2006 11:18:35 +0000 (-0800)
Subject: [PATCH] RLIMIT_CPU: fix handling of a zero limit
X-Git-Tag: v2.6.17-rc1~875
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e0661111e5441995f7a69dc4336c9f131cb9bc58;p=pandora-kernel.git

[PATCH] RLIMIT_CPU: fix handling of a zero limit

At present the kernel doesn't honour an attempt to set RLIMIT_CPU to zero
seconds.  But the spec says it should, and that's what 2.4.x does.

Fixing this for real would involve some complexity (such as adding a new
it-has-been-set flag to the task_struct, and testing that everwhere, instead
of overloading the value of it_prof_expires).

Given that a 2.4 kernel won't actually send the signal until one second has
expired anyway, let's just handle this case by treating the caller's
zero-seconds as one second.

Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Ulrich Weigand <uweigand@de.ibm.com>
Cc: Cliff Wickman <cpw@sgi.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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