linux-toradex.git/mm/dmapool.c, branch tegra-9.12.11 Linux kernel for Apalis and Colibri modules dmapool: enable debugging for CONFIG_SLUB_DEBUG_ON too 2008-04-28T15:58:20+00:00 Andi Kleen ak@suse.de 2008-04-28T09:12:37+00:00 b5ee5befa75e33e55d34584ad10286c5005cb1de Previously it was only enabled for CONFIG_DEBUG_SLAB. Not hooked into the slub runtime debug configuration, so you currently only get it with CONFIG_SLUB_DEBUG_ON, not plain CONFIG_SLUB_DEBUG Acked-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
Previously it was only enabled for CONFIG_DEBUG_SLAB.

Not hooked into the slub runtime debug configuration, so you currently only
get it with CONFIG_SLUB_DEBUG_ON, not plain CONFIG_SLUB_DEBUG

Acked-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
pool: Improve memory usage for devices which can't cross boundaries 2007-12-04T15:39:58+00:00 Matthew Wilcox matthew@wil.cx 2007-12-03T19:16:24+00:00 e34f44b3517fe545f7fd45a8c2f6ee1e5e4432d3 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> 
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>
Change dmapool free block management 2007-12-04T15:39:57+00:00 Matthew Wilcox matthew@wil.cx 2007-12-03T19:08:28+00:00 a35a3455142976e3fffdf27027f3082cbaba6e8c 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> 
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>
dmapool: Tidy up includes and add comments 2007-12-04T15:39:57+00:00 Matthew Wilcox matthew@wil.cx 2007-12-03T17:16:57+00:00 6182a0943af2235756836ed7e021fa22b93ec68b 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> 
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>
dmapool: Validate parameters to dma_pool_create 2007-12-04T15:39:56+00:00 Matthew Wilcox matthew@wil.cx 2007-12-03T17:10:24+00:00 399154be2dcb6a58dbde9682162c38113cf3e40b 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> 
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>
Avoid taking waitqueue lock in dmapool 2007-12-04T15:39:56+00:00 Matthew Wilcox matthew@wil.cx 2007-12-03T17:09:33+00:00 2cae367e4854ff055c4f5e8aacd56b0eeec9f6cb 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> 
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>
dmapool: Fix style problems 2007-12-04T15:39:55+00:00 Matthew Wilcox matthew@wil.cx 2007-12-03T17:04:31+00:00 e87aa773747fb5e4217d716ea22a573c03b6693a Run Lindent and fix all issues reported by checkpatch.pl Signed-off-by: Matthew Wilcox <willy@linux.intel.com> 
Run Lindent and fix all issues reported by checkpatch.pl

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Move dmapool.c to mm/ directory 2007-12-04T15:39:54+00:00 Matthew Wilcox matthew@wil.cx 2007-12-03T16:57:48+00:00 141e9d4b5492499c4735d764b599c21e83dac154 Signed-off-by: Matthew Wilcox <willy@linux.intel.com> 
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>