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| author | Zachary Amsden <zach@vmware.com> | 2005-09-03 15:55:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@evo.osdl.org> | 2005-09-05 00:05:48 -0700 |
| commit | 61e06037e764337da39dff307cbcdbe9cf288349 (patch) | |
| tree | e9719788c751c1d4a437c98056e2ddd7e34d5dfa /mm/slab.c | |
| parent | a600388d28419305aad3c4c0af52c223cf6fa0af (diff) | |
| download | lwn-61e06037e764337da39dff307cbcdbe9cf288349.tar.gz lwn-61e06037e764337da39dff307cbcdbe9cf288349.zip | |
[PATCH] x86_64: avoid some atomic operations during address space destruction
Any architecture that has hardware updated A/D bits that require
synchronization against other processors during PTE operations can benefit
from doing non-atomic PTE updates during address space destruction.
Originally done on i386, now ported to x86_64.
Doing a read/write pair instead of an xchg() operation saves the implicit
lock, which turns out to be a big win on 32-bit (esp w PAE).
Signed-off-by: Zachary Amsden <zach@vmware.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/slab.c')
0 files changed, 0 insertions, 0 deletions