From: "H. Peter Anvin" <hpa@zytor.com>
To: Scotty Bauer <sbauer@eng.utah.edu>,
tglx@linutronix.de, mingo@redheat.com
Cc: linux-kernel@vger.kernel.org, x86@kernel.org
Subject: Re: [PATCH] x86/smpboot: check if CLFLUSH is actually necessary
Date: Wed, 11 Feb 2015 13:55:34 -0800 [thread overview]
Message-ID: <54DBCFD6.8000509@zytor.com> (raw)
In-Reply-To: <54CBF6F9.5040508@eng.utah.edu>
On 01/30/2015 01:26 PM, Scotty Bauer wrote:
> mwait_play_dead previously issued a CLFLUSH to work around a bug on
> some xeon processors. We can now determine if the CPU is a buggy CPU.
> This patch checks if if we're on a buggy CPU which allows non-buggy
> cpu's to eliminate the CLFLUSH.
Here is my first question: does this matter at all? Otherwise I don't
see a point.
-hpa
next prev parent reply other threads:[~2015-02-11 21:56 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-30 21:26 [PATCH] x86/smpboot: check if CLFLUSH is actually necessary Scotty Bauer
2015-01-30 23:31 ` Borislav Petkov
2015-02-06 16:05 ` Borislav Petkov
2015-02-06 16:13 ` [PATCH] x86, smpboot: Call CLFLUSH only on X86_BUG_CLFLUSH_MONITOR-affected CPUs Borislav Petkov
2015-02-11 18:39 ` Scotty Bauer
2015-02-11 20:25 ` Borislav Petkov
2015-02-11 21:55 ` [PATCH] x86/smpboot: check if CLFLUSH is actually necessary H. Peter Anvin
2015-02-11 21:55 ` H. Peter Anvin [this message]
2015-02-11 23:10 ` Scotty Bauer
2015-02-12 9:16 ` Borislav Petkov
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