From: Andi Kleen <andi@firstfloor.org>
To: Samuel Thibault <samuel.thibault@ens-lyon.org>,
"Michael S. Zick" <lkml@morethan.org>,
Andi Kleen <andi@firstfloor.org>,
linux-kernel@vger.kernel.org
Subject: Re: [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic
Date: Fri, 22 May 2009 23:59:39 +0200 [thread overview]
Message-ID: <20090522215939.GI846@one.firstfloor.org> (raw)
In-Reply-To: <20090522204300.GA10166@const.famille.thibault.fr>
> > - You got bus master DMA in your test machine?
>
> That's not related to the LOCK_PREFIX concern, which is about the
> processor only, not interaction with other devices.
Actually it's related to other devices; but only very few (most MMIO
doesn't support atomic cycles and is uncached anyways). But there's no driver
for real hardware in Linux that relies on it to my knowledge.
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2009-05-22 21:53 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-22 16:39 [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic Michael S. Zick
2009-05-22 18:23 ` Andi Kleen
2009-05-22 18:36 ` Ingo Molnar
2009-05-22 18:59 ` H. Peter Anvin
2009-05-22 19:20 ` Michael S. Zick
2009-05-22 22:21 ` Michael S. Zick
2009-05-22 23:30 ` H. Peter Anvin
2009-05-23 0:45 ` Michael S. Zick
2009-05-23 0:51 ` H. Peter Anvin
2009-05-23 10:44 ` Michael S. Zick
2009-05-23 11:18 ` Michael S. Zick
2009-05-24 7:04 ` Harald Welte
2009-05-24 12:48 ` Michael S. Zick
2009-05-24 15:43 ` Michael S. Zick
2009-05-27 22:13 ` Roland Dreier
2009-05-27 22:33 ` Michael S. Zick
2009-05-23 15:52 ` Michael S. Zick
2009-05-23 18:04 ` Michael S. Zick
2009-05-23 23:44 ` H. Peter Anvin
2009-05-24 6:49 ` Harald Welte
2009-05-24 12:38 ` Michael S. Zick
2009-05-24 17:31 ` Harald Welte
2009-05-27 12:18 ` Re:[VIA Support] was: " Michael S. Zick
2009-05-27 12:22 ` [VIA " Michael S. Zick
2009-05-27 12:47 ` Harald Welte
2009-05-27 13:00 ` Michael S. Zick
2009-05-29 12:06 ` Michael S. Zick
2009-05-30 15:48 ` Michael S. Zick
2009-05-24 12:27 ` Michael S. Zick
2009-05-24 17:22 ` Harald Welte
2009-05-24 18:00 ` H. Peter Anvin
2009-05-24 18:32 ` Michael S. Zick
2009-05-24 18:46 ` H. Peter Anvin
2009-05-24 19:09 ` Michael S. Zick
2009-05-25 19:03 ` Michael S. Zick
2009-05-25 19:18 ` Michael S. Zick
2009-05-25 19:46 ` Michael S. Zick
2009-05-25 21:10 ` Michael S. Zick
2009-05-25 21:17 ` H. Peter Anvin
2009-05-25 23:03 ` Michael S. Zick
2009-05-25 23:35 ` Michael S. Zick
2009-05-26 0:05 ` H. Peter Anvin
2009-05-26 12:37 ` Michael S. Zick
2009-05-26 17:13 ` H. Peter Anvin
2009-05-25 1:31 ` i2c-viapro / via-fb drivers on VIA CX700 Harald Welte
2009-05-25 12:54 ` Michael S. Zick
2009-05-27 13:36 ` Michael S. Zick
2009-05-25 16:05 ` [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic Michael S. Zick
2009-05-28 20:30 ` Pavel Machek
2009-05-28 20:54 ` Michael S. Zick
2009-05-28 23:15 ` [Futex RFC] was " Michael S. Zick
2009-05-29 2:00 ` Michael S. Zick
2009-05-27 17:01 ` LOCK prefix on uni processor has its use (was Re: [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic) Harald Welte
2009-05-27 17:10 ` Michael S. Zick
2009-05-27 17:19 ` Thomas Gleixner
2009-05-27 17:25 ` Michael S. Zick
2009-05-27 18:08 ` LOCK prefix on uni processor has its use Andi Kleen
2009-05-27 18:22 ` Michael S. Zick
2009-05-27 18:33 ` Michael S. Zick
2009-05-27 18:55 ` Michael S. Zick
2009-05-27 18:38 ` Andi Kleen
2009-06-02 12:48 ` Harald Welte
2009-06-02 13:03 ` Andi Kleen
2009-06-02 13:26 ` Michael S. Zick
2009-06-02 13:42 ` Andi Kleen
2009-06-03 11:46 ` Michael S. Zick
2009-05-28 2:56 ` LOCK prefix on uni processor has its use (was Re: [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic) H. Peter Anvin
2009-05-23 20:51 ` [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic Michael S. Zick
2009-05-28 12:48 ` Pavel Machek
2009-05-28 13:29 ` Michael S. Zick
2009-05-28 20:50 ` Pavel Machek
2009-05-28 20:58 ` Michael S. Zick
2009-05-28 21:16 ` Pavel Machek
2009-05-28 21:21 ` Michael S. Zick
2009-05-22 19:17 ` Michael S. Zick
[not found] ` <200905221343.30638.lkml@morethan.org>
[not found] ` <20090522192329.GF846@one.firstfloor.org>
2009-05-22 19:53 ` Michael S. Zick
2009-05-22 20:05 ` Samuel Thibault
2009-05-22 20:32 ` Michael S. Zick
2009-05-22 20:42 ` Andi Kleen
2009-05-22 20:57 ` Michael S. Zick
2009-05-22 20:43 ` Samuel Thibault
2009-05-22 21:59 ` Andi Kleen [this message]
2009-05-22 22:00 ` Samuel Thibault
2009-05-22 22:14 ` Andi Kleen
2009-05-22 22:14 ` Samuel Thibault
2009-05-22 20:45 ` Roland Dreier
2009-05-24 18:59 ` Robert Hancock
-- strict thread matches above, loose matches on Subject: below --
2009-05-22 18:50 Michael S. Zick
2009-05-22 19:24 ` Roland Dreier
2009-05-22 20:03 ` Michael S. Zick
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