Messages in this thread Patch in this message | | | Date | Tue, 24 Nov 2009 11:55:15 +0100 | From | Tim Blechmann <> | Subject | [PATCH 1/5] process_64: remove branch hint |
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branch hint profiling of my nehalem machine, showed 96% incorrect branch hints:
6548732 174664120 96 __switch_to process_64.c 406 6548745 174565593 96 __switch_to process_64.c 410
Signed-off-by: Tim Blechmann <tim@klingt.org> --- arch/x86/kernel/process_64.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index c8d0ece..1e2e1fe 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -403,11 +403,11 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) * This won't pick up thread selector changes, but I guess that is ok. */ savesegment(es, prev->es); - if (unlikely(next->es | prev->es)) + if (next->es | prev->es) loadsegment(es, next->es); savesegment(ds, prev->ds); - if (unlikely(next->ds | prev->ds)) + if (next->ds | prev->ds) loadsegment(ds, next->ds); -- 1.6.4.2
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