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| author | Matthew Wilcox <[email protected]> | 2007-12-03 19:16:24 +0000 |
|---|---|---|
| committer | Matthew Wilcox <[email protected]> | 2007-12-04 15:39:58 +0000 |
| commit | e34f44b3517fe545f7fd45a8c2f6ee1e5e4432d3 (patch) | |
| tree | 826655b80622dee3cff9ddd0e9aa3ee9908627fe /fs/jbd/commit.c | |
| parent | Change dmapool free block management (diff) | |
| download | kernel-e34f44b3517fe545f7fd45a8c2f6ee1e5e4432d3.tar.gz kernel-e34f44b3517fe545f7fd45a8c2f6ee1e5e4432d3.zip | |
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 <[email protected]>
Acked-by: David S. Miller <[email protected]>
Diffstat (limited to 'fs/jbd/commit.c')
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