Message	SHA1
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> Matthew Wilcox   commited 2007-12-04 10:39:58 -05:00	e34f44b351
Change dmapool free block management ... Use a list of free blocks within a page instead of using a bitmap. Update documentation to reflect this. As well as being a slight reduction in memory allocation, locked ops and lines of code, it speeds up a transaction processing benchmark by 0.4%. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Matthew Wilcox   commited 2007-12-04 10:39:57 -05:00	a35a345514
dmapool: Tidy up includes and add comments ... We were missing a copyright statement and license, so add GPLv2, David Brownell's copyright and my copyright. The asm/io.h include was superfluous, but we were missing a few other necessary includes. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Matthew Wilcox   commited 2007-12-04 10:39:57 -05:00	6182a0943a
dmapool: Validate parameters to dma_pool_create ... Check that 'align' is a power of two, like the API specifies. Align 'size' to 'align' correctly -- the current code has an off-by-one. The ALIGN macro in kernel.h doesn't. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Acked-by: David S. Miller <davem@davemloft.net> Matthew Wilcox   commited 2007-12-04 10:39:56 -05:00	399154be2d
Avoid taking waitqueue lock in dmapool ... With one trivial change (taking the lock slightly earlier on wakeup from schedule), all uses of the waitq are under the pool lock, so we can use the locked (or __) versions of the wait queue functions, and avoid the extra spinlock. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Acked-by: David S. Miller <davem@davemloft.net> Matthew Wilcox   commited 2007-12-04 10:39:56 -05:00	2cae367e48
dmapool: Fix style problems ... Run Lindent and fix all issues reported by checkpatch.pl Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Matthew Wilcox   commited 2007-12-04 10:39:55 -05:00	e87aa77374
Move dmapool.c to mm/ directory ... Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Matthew Wilcox   commited 2007-12-04 10:39:54 -05:00	141e9d4b54

Renamed from drivers/base/dmapool.c (Browse further)