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authorAndi Kleen <ak@suse.de>2006-02-03 21:51:02 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-04 16:43:13 -0800
commit7bcd3f34e262bbebffa954d80eab3a84f053da31 (patch)
treef0765da9eaa8024a2b1d67d3e43730cb32f99fa7 /include
parent6bca52b544489b626c7d0db801df6b4aa3d5adb5 (diff)
[PATCH] x86_64: Undo the earlier changes to remove unrolled copy/memset functions
They cause quite bad performance regressions on Netburst This is temporary until we can get new optimized functions for these CPUs. This undoes changes that were done in 2.6.15 and in 2.6.16-rc1, essentially bringing the code back to 2.6.14 level. Only change is I renamed the X86_FEATURE_K8_C flag to X86_FEATURE_REP_GOOD and fixed the check for the flag and also fixed some comments. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
-rw-r--r--include/asm-x86_64/cpufeature.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-x86_64/cpufeature.h b/include/asm-x86_64/cpufeature.h
index 41c0ac8559b..76bb6193ae9 100644
--- a/include/asm-x86_64/cpufeature.h
+++ b/include/asm-x86_64/cpufeature.h
@@ -61,7 +61,7 @@
#define X86_FEATURE_K6_MTRR (3*32+ 1) /* AMD K6 nonstandard MTRRs */
#define X86_FEATURE_CYRIX_ARR (3*32+ 2) /* Cyrix ARRs (= MTRRs) */
#define X86_FEATURE_CENTAUR_MCR (3*32+ 3) /* Centaur MCRs (= MTRRs) */
-/* 4 free */
+#define X86_FEATURE_REP_GOOD (3*32+ 4) /* rep microcode works well on this CPU */
#define X86_FEATURE_CONSTANT_TSC (3*32+5) /* TSC runs at constant rate */
#define X86_FEATURE_SYNC_RDTSC (3*32+6) /* RDTSC syncs CPU core */