x86_64: speedup touch_nmi_watchdog
authorAndrew Morton <akpm@linux-foundation.org>
Tue, 17 Jul 2007 11:03:58 +0000 (04:03 -0700)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Tue, 17 Jul 2007 17:23:04 +0000 (10:23 -0700)
commit567f3e422a9a155d7c7643148efb5bf959065d34
tree2b9959e3328fd78c4fe1ef371f02604de97c39eb
parentf2890255b0ade497893d1e5e99f519b5c1d50f7d
x86_64: speedup touch_nmi_watchdog

Avoid dirtying remote cpu's memory if it already has the correct value.

Cc: Andi Kleen <ak@suse.de>
Cc: Konrad Rzeszutek <konrad@darnok.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/x86_64/kernel/nmi.c