From: torvalds@transmeta.com (Linus Torvalds)
To: linux-kernel@vger.kernel.org
Subject: Re: [patch] 'sticky pages' support in the VM, futex-2.5.38-C5
Date: Thu, 26 Sep 2002 15:01:51 +0000 (UTC) [thread overview]
Message-ID: <amv7gv$266$1@penguin.transmeta.com> (raw)
In-Reply-To: Pine.LNX.4.44.0209261311070.11487-100000@localhost.localdomain
In article <Pine.LNX.4.44.0209261311070.11487-100000@localhost.localdomain>,
Ingo Molnar <mingo@elte.hu> wrote:
>
>while running fork() testcases with NPTL we found a number of futex
>related failures that i tracked down to the following conceptual bug in
>the futex code:
This patch seems trivially broken by having two futexes on the same
page. When the first futex removes itself, it will clear the sticky
bit, even though the other futex is still pinning the same page.
Trust me, you'll have to use the page list approach.
Linus
next prev parent reply other threads:[~2002-09-26 14:53 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-26 11:30 [patch] 'sticky pages' support in the VM, futex-2.5.38-C5 Ingo Molnar
2002-09-26 15:01 ` Linus Torvalds [this message]
2002-09-26 22:09 ` Andrew Morton
2002-09-26 22:32 ` Linus Torvalds
2002-09-27 7:53 ` Ingo Molnar
2002-09-26 22:45 ` Linus Torvalds
2002-09-26 22:56 ` Linus Torvalds
2002-09-27 11:11 ` Ingo Molnar
2002-10-04 22:47 ` Jamie Lokier
2002-10-04 23:20 ` Linus Torvalds
[not found] <200209261501.g8QF1pc02251@penguin.transmeta.com>
2002-09-26 15:27 ` Ingo Molnar
2002-09-26 16:48 ` Alan Cox
-- strict thread matches above, loose matches on Subject: below --
2002-09-27 8:05 Martin Wirth
2002-09-27 9:27 ` Ingo Molnar
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