From 4953198b6ce07b008b0f1c2edd41c9d027a118b4 Mon Sep 17 00:00:00 2001
From: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Date: Tue, 8 May 2007 00:33:01 -0700
Subject: [PATCH] sched: optimize siblings status check logic in wake_idle()

When a logical cpu 'x' already has more than one process running, then most
likely the siblings of that cpu 'x' must be busy.  Otherwise the idle
siblings would have likely(in most of the scenarios) picked up the extra
load making the load on 'x' atmost one.

Use this logic to eliminate the siblings status check and minimize the cache
misses encountered on a heavily loaded system.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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