01 Jul, 2009

1 commit

• c49568235   dmapools: protect page_list walk in show_pools() ... Browse Code »

  show_pools() walks the page_list of a pool w/o protection against the list
  modifications in alloc/free. Take pool->lock to avoid stomping into
  nirvana.

  Signed-off-by: Thomas Gleixner
  Signed-off-by: Matthew Wilcox
  Signed-off-by: Andrew Morton
  Signed-off-by: Linus Torvalds

  Thomas Gleixner

  2009-07-01 09:56:00 +0800  

28 Apr, 2008

1 commit

• b5ee5befa   dmapool: enable debugging for CONFIG_SLUB_DEBUG_ON too ... Browse Code »

  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
  Signed-off-by: Andi Kleen
  Signed-off-by: Andrew Morton
  Signed-off-by: Linus Torvalds

  Andi Kleen

  2008-04-28 23:58:20 +0800  

04 Dec, 2007

7 commits

• e34f44b35   pool: Improve memory usage for devices which can't cross boundaries ... Browse Code »

  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
  Acked-by: David S. Miller

  Matthew Wilcox

  2007-12-04 23:39:58 +0800  
• a35a34551   Change dmapool free block management ... Browse Code »

  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

  Matthew Wilcox

  2007-12-04 23:39:57 +0800  
• 6182a0943   dmapool: Tidy up includes and add comments ... Browse Code »

  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

  Matthew Wilcox

  2007-12-04 23:39:57 +0800  
• 399154be2   dmapool: Validate parameters to dma_pool_create ... Browse Code »

  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
  Acked-by: David S. Miller

  Matthew Wilcox

  2007-12-04 23:39:56 +0800  
• 2cae367e4   Avoid taking waitqueue lock in dmapool ... Browse Code »

  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
  Acked-by: David S. Miller

  Matthew Wilcox

  2007-12-04 23:39:56 +0800  
• e87aa7737   dmapool: Fix style problems ... Browse Code »

  Run Lindent and fix all issues reported by checkpatch.pl

  Signed-off-by: Matthew Wilcox

  Matthew Wilcox

  2007-12-04 23:39:55 +0800  
• 141e9d4b5   Move dmapool.c to mm/ directory ... Browse Code »

  Signed-off-by: Matthew Wilcox

  Matthew Wilcox

  2007-12-04 23:39:54 +0800