diff options
author | Paul Jackson <pj@sgi.com> | 2006-12-06 20:31:49 -0800 |
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committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-07 08:39:20 -0800 |
commit | 7253f4ef04b1cd138baf2b29a95473743ac0a307 (patch) | |
tree | 5883e6773a3cdad31992539ba3ad989d2566a041 /Documentation/cpu-freq/index.txt | |
parent | 9276b1bc96a132f4068fdee00983c532f43d3a26 (diff) |
[PATCH] memory page_alloc zonelist caching reorder structure
Rearrange the struct members in the 'struct zonelist_cache' structure, so
as to put the readonly (once initialized) z_to_n[] array first, where it
will come right after the zones[] array in struct zonelist.
This pretty much eliminates the chance that the two frequently written
elements of 'struct zonelist_cache', the fullzones bitmap and last_full_zap
times, will end up on the same cache line as the performance sensitive,
frequently read, never (after init) written zones[] array.
Keeping frequently written data off frequently read cache lines is good for
performance.
Thanks to Rohit Seth for the suggestion.
Signed-off-by: Paul Jackson <pj@sgi.com>
Cc: Rohit Seth <rohitseth@google.com>
Cc: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation/cpu-freq/index.txt')
0 files changed, 0 insertions, 0 deletions