linux-kernel - Re: [PATCH] fix-flush_workqueue-vs-cpu

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Message-ID: <20070107110013.GD13579@in.ibm.com>
Date:	Sun, 7 Jan 2007 16:30:13 +0530
From:	Srivatsa Vaddagiri <vatsa@...ibm.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	Oleg Nesterov <oleg@...sign.ru>,
	David Howells <dhowells@...hat.com>,
	Christoph Hellwig <hch@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...l.org>,
	linux-kernel@...r.kernel.org, Gautham shenoy <ego@...ibm.com>
Subject: Re: [PATCH] fix-flush_workqueue-vs-cpu_dead-race-update

On Sat, Jan 06, 2007 at 11:11:17AM -0800, Andrew Morton wrote:
> Has anyone thought seriously about using the process freezer in the
> cpu-down/cpu-up paths?  That way we don't need to lock anything anywhere?

How would this provide a stable access to cpu_online_map in functions
that need to block while accessing it (as flush_workqueue requires)?

-- 
Regards,
vatsa
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