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authorMatthew Wilcox <matthew@wil.cx>2007-12-03 22:16:24 +0300
committerMatthew Wilcox <matthew@wil.cx>2007-12-04 18:39:58 +0300
commite34f44b3517fe545f7fd45a8c2f6ee1e5e4432d3 (patch)
tree826655b80622dee3cff9ddd0e9aa3ee9908627fe /mm/Makefile
parenta35a3455142976e3fffdf27027f3082cbaba6e8c (diff)
downloadlinux-e34f44b3517fe545f7fd45a8c2f6ee1e5e4432d3.tar.xz
pool: Improve memory usage for devices which can't cross boundaries
The previous implementation simply refused to allocate more than a boundary's worth of data from an entire page. Some users didn't know this, so specified things like SMP_CACHE_BYTES, not realising the horrible waste of memory that this was. It's fairly easy to correct this problem, just by ensuring we don't cross a boundary within a page. This even helps drivers like EHCI (which can't cross a 4k boundary) on machines with larger page sizes. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Acked-by: David S. Miller <davem@davemloft.net>
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