From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>,
Hugh Dickens <hugh@veritas.com>,
David Rientjes <rientjes@google.com>,
Zachary Amsden <zach@vmware.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Rusty Russell <rusty@rustcorp.com.au>, Andi Kleen <ak@suse.de>,
Keir Fraser <keir@xensource.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: race with page_referenced_one->ptep_test_and_clear_young and pagetable setup/pulldown
Date: Sun, 7 Oct 2007 19:52:29 +1000 [thread overview]
Message-ID: <200710071952.30192.nickpiggin@yahoo.com.au> (raw)
In-Reply-To: <20071004194432.9b3353c2.akpm@linux-foundation.org>
On Friday 05 October 2007 12:44, Andrew Morton wrote:
> On Thu, 04 Oct 2007 18:43:32 -0700 Jeremy Fitzhardinge <jeremy@goop.org>
wrote:
> > David's change 10a8d6ae4b3182d6588a5809a8366343bc295c20, "i386: add
> > ptep_test_and_clear_{dirty,young}" has introduced an SMP race which
> > affects the Xen pv-ops backend.
>
> y'know, I think I think it's been several years since I saw a report of an
> honest to goodness, genuine SMP race in core kernel. We used to be
> infested by them, but the term has fallen into disuse. Interesting, but
> OT.
Does that include data races on weakly ordered systems, or UP races
(ie. with sleeping locks rather than spinning ones)? ;) Because we had
and have a few of those...
next prev parent reply other threads:[~2007-10-08 2:24 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-05 1:43 race with page_referenced_one->ptep_test_and_clear_young and pagetable setup/pulldown Jeremy Fitzhardinge
2007-10-05 1:52 ` Rik van Riel
2007-10-05 4:15 ` Jeremy Fitzhardinge
2007-10-05 13:17 ` Rik van Riel
2007-10-05 2:44 ` Andrew Morton
2007-10-05 4:08 ` Jeremy Fitzhardinge
2007-10-07 9:52 ` Nick Piggin [this message]
2007-10-05 11:36 ` Hugh Dickins
2007-10-05 18:58 ` Rik van Riel
2007-10-05 19:40 ` Jeremy Fitzhardinge
2007-10-05 19:56 ` Rik van Riel
2007-10-05 19:39 ` Jeremy Fitzhardinge
[not found] <C32B9BEC.E711%keir@xensource.com>
2007-10-05 8:03 ` Andi Kleen
2007-10-05 9:05 ` Jeremy Fitzhardinge
2007-10-05 9:15 ` Keir Fraser
2007-10-05 15:33 ` Hugh Dickins
2007-10-05 15:46 ` Keir Fraser
2007-10-05 16:48 ` Jeremy Fitzhardinge
2007-10-05 20:35 ` Jeremy Fitzhardinge
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