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[PATCH] Optimize D-cache alias handling on fork

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Virtually index, physically tagged cache architectures can get away
without cache flushing when forking.  This patch adds a new cache
flushing function flush_cache_dup_mm(struct mm_struct *) which for the
moment I've implemented to do the same thing on all architectures
except on MIPS where it's a no-op.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ralf Baechle 2006-12-12 17:14:57 +00:00 • committed by Linus Torvalds
parent bcd022801e
commit ec8c0446b6
27 changed files with 54 additions and 7 deletions
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2
kernel/fork.c
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@ -203,7 +203,7 @@ static inline int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
struct mempolicy *pol;
down_write(&oldmm->mmap_sem);
flush_cache_mm(oldmm);
flush_cache_dup_mm(oldmm);
/*
* Not linked in yet - no deadlock potential:
*/