From: "H. Peter Anvin" <hpa@zytor.com>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <borislav.petkov@amd.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [GIT PULL] x86/cpu changes for v2.6.34
Date: Sat, 27 Feb 2010 12:03:09 -0800 [thread overview]
Message-ID: <4B897A7D.9040108@zytor.com> (raw)
In-Reply-To: <20100227091039.7608155c@infradead.org>
On 02/27/2010 09:10 AM, Arjan van de Ven wrote:
> On Sat, 27 Feb 2010 16:09:42 +0100
> Ingo Molnar <mingo@elte.hu> wrote:
>
>> +int wbinvd_on_all_cpus(void)
>> +{
>> + return on_each_cpu(__wbinvd, NULL, 1);
>> +}
>
> does this make sense at all?
>
> doesn't cache coherency on x86 already guarantee this?
>
No, WBINVD (unlike CLFLUSH) is local to one CPU.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
next prev parent reply other threads:[~2010-02-27 20:06 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-27 15:09 [GIT PULL] x86/cpu changes for v2.6.34 Ingo Molnar
2010-02-27 17:10 ` Arjan van de Ven
2010-02-27 20:03 ` H. Peter Anvin [this message]
2010-02-28 20:09 ` Linus Torvalds
2010-02-28 20:45 ` Linus Torvalds
2010-03-01 8:00 ` Ingo Molnar
2010-03-01 13:17 ` Frederic Weisbecker
2010-03-01 16:47 ` Linus Torvalds
2010-03-01 19:42 ` Steven Rostedt
2010-03-01 22:23 ` Steven Rostedt
2010-03-01 22:24 ` H. Peter Anvin
2010-03-01 19:29 ` Steven Rostedt
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