From: David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
To: npiggin-l3A5Bk7waGM@public.gmane.org
Cc: torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org,
hugh-DTz5qymZ9yRBDgjK7y7TUQ@public.gmane.org,
linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
benh-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org
Subject: Re: [rfc] data race in page table setup/walking?
Date: Tue, 29 Apr 2008 03:56:07 -0700 (PDT) [thread overview]
Message-ID: <20080429.035607.224699531.davem@davemloft.net> (raw)
In-Reply-To: <20080429050054.GC21795-B4tOwbsTzaBolqkO4TVVkw@public.gmane.org>
From: Nick Piggin <npiggin-l3A5Bk7waGM@public.gmane.org>
Date: Tue, 29 Apr 2008 07:00:54 +0200
> So anyway... comments, please? Am I dreaming the whole thing up? I suspect
> that if I'm not, then powerpc at least might have been impacted by the race,
> but as far as I know of, they haven't seen stability problems around there...
> Might just be terribly rare, though. I'd like to try to make a test program
> to reproduce the problem if I can get access to a box...
This definitely does look like a real problem, albeit pretty hard to
trigger I would say. :-)
Thanks for looking into this.
WARNING: multiple messages have this Message-ID (diff)
From: David Miller <davem@davemloft.net>
To: npiggin@suse.de
Cc: torvalds@linux-foundation.org, hugh@veritas.com,
linux-arch@vger.kernel.org, linux-mm@kvack.org,
benh@kernel.crashing.org
Subject: Re: [rfc] data race in page table setup/walking?
Date: Tue, 29 Apr 2008 03:56:07 -0700 (PDT) [thread overview]
Message-ID: <20080429.035607.224699531.davem@davemloft.net> (raw)
Message-ID: <20080429105607.4UcnzLalyQSmUHZx72rGpW5oF61cMFAuMyNy1ZlzYck@z> (raw)
In-Reply-To: <20080429050054.GC21795@wotan.suse.de>
From: Nick Piggin <npiggin@suse.de>
Date: Tue, 29 Apr 2008 07:00:54 +0200
> So anyway... comments, please? Am I dreaming the whole thing up? I suspect
> that if I'm not, then powerpc at least might have been impacted by the race,
> but as far as I know of, they haven't seen stability problems around there...
> Might just be terribly rare, though. I'd like to try to make a test program
> to reproduce the problem if I can get access to a box...
This definitely does look like a real problem, albeit pretty hard to
trigger I would say. :-)
Thanks for looking into this.
next prev parent reply other threads:[~2008-04-29 10:56 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-29 5:00 [rfc] data race in page table setup/walking? Nick Piggin
2008-04-29 5:00 ` Nick Piggin
[not found] ` <20080429050054.GC21795-B4tOwbsTzaBolqkO4TVVkw@public.gmane.org>
2008-04-29 5:08 ` Benjamin Herrenschmidt
2008-04-29 5:08 ` Benjamin Herrenschmidt
2008-04-29 5:41 ` Nick Piggin
2008-04-29 5:41 ` Nick Piggin
2008-04-29 10:56 ` David Miller [this message]
2008-04-29 10:56 ` David Miller
2008-04-29 12:36 ` Hugh Dickins
2008-04-29 12:36 ` Hugh Dickins
[not found] ` <Pine.LNX.4.64.0804291333540.22025-popGQ1T0qN76K7/ahGyk6A@public.gmane.org>
2008-04-29 21:37 ` Benjamin Herrenschmidt
2008-04-29 21:37 ` Benjamin Herrenschmidt
2008-04-29 22:47 ` Hugh Dickins
2008-04-29 22:47 ` Hugh Dickins
[not found] ` <Pine.LNX.4.64.0804292328110.23470-popGQ1T0qN76K7/ahGyk6A@public.gmane.org>
2008-04-30 0:09 ` Benjamin Herrenschmidt
2008-04-30 0:09 ` Benjamin Herrenschmidt
2008-04-30 6:03 ` Nick Piggin
2008-04-30 6:03 ` Nick Piggin
[not found] ` <20080430060340.GE27652-B4tOwbsTzaBolqkO4TVVkw@public.gmane.org>
2008-04-30 6:05 ` David Miller
2008-04-30 6:05 ` David Miller
[not found] ` <20080429.230543.98200575.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2008-04-30 6:17 ` Nick Piggin
2008-04-30 6:17 ` Nick Piggin
2008-04-30 11:14 ` Hugh Dickins
2008-04-30 11:14 ` Hugh Dickins
[not found] ` <Pine.LNX.4.64.0804301140490.4651-popGQ1T0qN76K7/ahGyk6A@public.gmane.org>
2008-05-01 0:35 ` Nick Piggin
2008-05-01 0:35 ` Nick Piggin
[not found] ` <20080501003542.GB11312-B4tOwbsTzaBolqkO4TVVkw@public.gmane.org>
2008-05-01 12:45 ` Hugh Dickins
2008-05-01 12:45 ` Hugh Dickins
2008-04-30 15:53 ` Linus Torvalds
2008-04-30 15:53 ` Linus Torvalds
[not found] ` <alpine.LFD.1.10.0804300848390.2997-5CScLwifNT1QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>
2008-05-01 0:29 ` Nick Piggin
2008-05-01 0:29 ` Nick Piggin
[not found] ` <20080501002955.GA11312-B4tOwbsTzaBolqkO4TVVkw@public.gmane.org>
2008-05-01 3:24 ` Linus Torvalds
2008-05-01 3:24 ` Linus Torvalds
2008-05-02 1:20 ` Nick Piggin
2008-05-02 1:33 ` Linus Torvalds
2008-05-02 1:43 ` Nick Piggin
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