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Commit 27fbe5b2 authored by Andi Kleen's avatar Andi Kleen Committed by Andi Kleen
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[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: default avatarAndi Kleen <ak@suse.de>
parent 35d534a3

arch/x86_64/kernel/setup.c

+2 −0
Original line number Diff line number Diff line
@@ -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);