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[PATCH] sched: add cacheflush() asm

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Add per-arch sched_cacheflush() which is a write-back cacheflush used by
the migration-cost calibration code at bootup time.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar
2006-01-12 01:05:27 -08:00
committed by Linus Torvalds
parent c6b44d10f2
commit 4dc7a0bbeb
16 changed files with 148 additions and 0 deletions
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include/asm-x86_64/system.h
+9
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@@ -193,6 +193,15 @@ static inline void write_cr4(unsigned long val)
#define wbinvd() \
__asm__ __volatile__ ("wbinvd": : :"memory");
/*
* On SMP systems, when the scheduler does migration-cost autodetection,
* it needs a way to flush as much of the CPU's caches as possible.
*/
static inline void sched_cacheflush(void)
{
wbinvd();
}
#endif /* __KERNEL__ */
#define nop() __asm__ __volatile__ ("nop")