linux-kernel - Re: current linux-2.6.git: cpusets completely broken

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Message-ID: <487B759B.40700@sgi.com>
Date:	Mon, 14 Jul 2008 08:49:47 -0700
From:	Mike Travis <travis@....com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dmitry Adamushko <dmitry.adamushko@...il.com>,
	Vegard Nossum <vegard.nossum@...il.com>,
	Paul Menage <menage@...gle.com>,
	Max Krasnyansky <maxk@...lcomm.com>, Paul Jackson <pj@....com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>, miaox@...fujitsu.com,
	rostedt@...dmis.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: current linux-2.6.git: cpusets completely broken

Andi Kleen wrote:
> Linus Torvalds <torvalds@...ux-foundation.org> writes:
>> Btw - the way to avoid this whole problem might be to make CPU migration 
>> use a *different* CPU map than "online".
> 
> In general I think we need more such masks. Some time ago I had
> a patch to introduce cpu_ever_online_mask, which prevented some
> problems with accessing uninitialized per cpu data.

Not to divert the conversation too much but I would like to see these
maps allocated based on the real number of cpus and not NR_CPUS.

Thanks,
Mike
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