tree 826655b80622dee3cff9ddd0e9aa3ee9908627fe
parent a35a3455142976e3fffdf27027f3082cbaba6e8c
author Matthew Wilcox <matthew@wil.cx> 1196709384 -0500
committer Matthew Wilcox <matthew@wil.cx> 1196782798 -0500

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>