[PATCH] Use string instructions for Core2 copy/clear

It is faster than using a unrolled loop for the use cases the kernel cares about (cached, sizes typically < 4K) Signed-off-by: Andi Kleen <ak@suse.de>
git-mirror · Sep 26, 2006 · 27fbe5b · 27fbe5b
1 parent 35d534a
commit 27fbe5b
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c
@@ -843,6 +843,8 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
 	if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
 	    (c->x86 == 0x6 && c->x86_model >= 0x0e))
 		set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
+	if (c->x86 == 6)
+		set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
 	set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
  	c->x86_max_cores = intel_num_cpu_cores(c);