linux-kernel - [PATCH] x86/smpboot: check if CLFLUSH is actually necessary

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Date:	Fri, 30 Jan 2015 14:26:17 -0700
From:	Scotty Bauer <sbauer@....utah.edu>
To:	tglx@...utronix.de, mingo@...heat.com, hpa@...or.com
CC:	linux-kernel@...r.kernel.org, x86@...nel.org
Subject: [PATCH] x86/smpboot: check if CLFLUSH is actually necessary

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.

View attachment "0001-Add-check-to-determine-if-CLFLUSH-is-actually-necess.patch" of type "text/x-diff" (1506 bytes)