From: Jeremy Fitzhardinge <jeremy@goop.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Zachary Amsden <zamsden@redhat.com>,
Glauber Costa <glommer@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>, Avi Kivity <avi@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] x86: fix ordering constraints on crX read/writes
Date: Thu, 15 Jul 2010 12:28:19 -0700 [thread overview]
Message-ID: <4C3F6153.6020005@goop.org> (raw)
In-Reply-To: <4C3F5972.2030600@zytor.com>
On 07/15/2010 11:54 AM, H. Peter Anvin wrote:
> No, we haven't. You're misunderstanding what a "memory" clobber does.
> A clobber affects the output side only, but doesn't inherently provide
> ordering on the input side. Apparently this is implicit in "asm
> volatile", which is a very important property.
OK. It would be nice to get that confirmed.
J
next prev parent reply other threads:[~2010-07-15 19:28 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-14 22:12 [PATCH] x86: fix ordering constraints on crX read/writes Jeremy Fitzhardinge
2010-07-15 0:28 ` Zachary Amsden
2010-07-15 0:55 ` Jeremy Fitzhardinge
2010-07-15 1:00 ` Zachary Amsden
2010-07-15 1:29 ` H. Peter Anvin
2010-07-15 14:34 ` Jeremy Fitzhardinge
2010-07-15 18:54 ` H. Peter Anvin
2010-07-15 19:28 ` Jeremy Fitzhardinge [this message]
2010-07-15 19:36 ` H. Peter Anvin
2010-07-15 19:57 ` Jeremy Fitzhardinge
2010-07-15 7:07 ` Avi Kivity
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