From: Nick Piggin <npiggin@suse.de>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Hugh Dickins <hugh@veritas.com>,
linux-arch@vger.kernel.org,
Linux Memory Management List <linux-mm@kvack.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: [rfc] data race in page table setup/walking?
Date: Fri, 2 May 2008 03:43:37 +0200 [thread overview]
Message-ID: <20080502014337.GA11844@wotan.suse.de> (raw)
In-Reply-To: <alpine.LFD.1.10.0805011832010.5994@woody.linux-foundation.org>
On Thu, May 01, 2008 at 06:33:45PM -0700, Linus Torvalds wrote:
>
>
> On Fri, 2 May 2008, Nick Piggin wrote:
> >
> > I guess it is possible. But at least in the case of write address, you'd
> > have to wait for later stores anyway in order to do the alias detection,
> > which might be the most common case.
>
> No, just the *address*. The data for the second store may not be ready,
> but the address may have been resolved (and checked that it doesn't fault
> etc) and the previous store may complete.
Yes in the case of other dependencies I agreed that it would be possible.
In the case of just address it doesn't really make sense.
prev parent reply other threads:[~2008-05-02 1:43 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
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 [this message]
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