From: Peter Zijlstra <peterz@infradead.org>
To: Nick Piggin <npiggin@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Linux Memory Management List <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [patch] mm: fix race in COW logic
Date: Fri, 27 Jun 2008 11:13:12 +0200 [thread overview]
Message-ID: <1214557992.2801.24.camel@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20080623121831.GA26555@wotan.suse.de>
On Mon, 2008-06-23 at 14:18 +0200, Nick Piggin wrote:
> BTW. Yes, the race identified is pretty slim, requiring a lot to happen
> on other CPUs between a small non-preemptible window of instructions,
> it *might* actually happen in practice on larger systems where cachelines
> might be highly contended or take a long time to get from one place to
> another...
> and the -rt patchset where I assume ptl is preemptible too.
Indeed.
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next prev parent reply other threads:[~2008-06-27 9:13 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-22 15:30 [patch] mm: fix race in COW logic Nick Piggin
2008-06-22 17:11 ` Hugh Dickins
2008-06-22 17:35 ` Linus Torvalds
2008-06-22 18:10 ` Hugh Dickins
2008-06-22 18:18 ` Linus Torvalds
2008-06-23 1:49 ` Nick Piggin
2008-06-23 10:04 ` Hugh Dickins
2008-06-23 12:18 ` Nick Piggin
2008-06-23 12:30 ` Nick Piggin
2008-06-23 15:39 ` Hugh Dickins
2008-06-27 9:19 ` Peter Zijlstra
2008-06-27 9:13 ` Peter Zijlstra [this message]
2008-06-23 1:52 ` Nick Piggin
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