All of lore.kernel.org
 help / color / mirror / Atom feed
* [PATCHv2 00/11] dmapool enhancements
@ 2022-12-16 20:16 Keith Busch
  2022-12-16 20:16 ` [PATCHv2 01/11] dmapool: add alloc/free performance test Keith Busch
                   ` (10 more replies)
  0 siblings, 11 replies; 28+ messages in thread
From: Keith Busch @ 2022-12-16 20:16 UTC (permalink / raw)
  To: linux-mm, linux-kernel, Matthew Wilcox
  Cc: Tony Battersby, Kernel Team, Keith Busch

From: Keith Busch <kbusch@kernel.org>

The time spent in dma_pool alloc/free goes up linearly as the number of
pages backing the pool increases. We can reduce this to constant time
with some minor changes to how free pages are tracked.

Changes since previous version:

  Fixed dmapool_test to use appropriate dma_op accessors

  Fixed up comment in dmapool about the data structures

  Fixed dma pool boundary checks when initializing the pool

  And since I mess up the boundary checks for odd alignment, I updated
  dmapool_test allow setting arbitrary alignment and boundary to catch
  the same case that failed in the previous version, reported here:

   https://lore.kernel.org/oe-lkp/202212112301.ad0819f7-oliver.sang@intel.com/

Keith Busch (7):
  dmapool: add alloc/free performance test
  dmapool: move debug code to own functions
  dmapool: rearrange page alloc failure handling
  dmapool: consolidate page initialization
  dmapool: simplify freeing
  dmapool: don't memset on free twice
  dmapool: link blocks across pages

Tony Battersby (4):
  dmapool: remove checks for dev == NULL
  dmapool: use sysfs_emit() instead of scnprintf()
  dmapool: cleanup integer types
  dmapool: speedup DMAPOOL_DEBUG with init_on_alloc

 mm/Kconfig        |   9 ++
 mm/Makefile       |   1 +
 mm/dmapool.c      | 356 ++++++++++++++++++++++------------------------
 mm/dmapool_test.c | 146 +++++++++++++++++++
 4 files changed, 324 insertions(+), 188 deletions(-)
 create mode 100644 mm/dmapool_test.c

-- 
2.30.2


^ permalink raw reply	[flat|nested] 28+ messages in thread

end of thread, other threads:[~2022-12-27 20:21 UTC | newest]

Thread overview: 28+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-12-16 20:16 [PATCHv2 00/11] dmapool enhancements Keith Busch
2022-12-16 20:16 ` [PATCHv2 01/11] dmapool: add alloc/free performance test Keith Busch
2022-12-16 20:16 ` [PATCHv2 02/11] dmapool: remove checks for dev == NULL Keith Busch
2022-12-23 16:27   ` Christoph Hellwig
2022-12-16 20:16 ` [PATCHv2 03/11] dmapool: use sysfs_emit() instead of scnprintf() Keith Busch
2022-12-23 16:28   ` Christoph Hellwig
2022-12-16 20:16 ` [PATCHv2 04/11] dmapool: cleanup integer types Keith Busch
2022-12-23 16:29   ` Christoph Hellwig
2022-12-16 20:16 ` [PATCHv2 05/11] dmapool: speedup DMAPOOL_DEBUG with init_on_alloc Keith Busch
2022-12-23 16:29   ` Christoph Hellwig
2022-12-16 20:16 ` [PATCHv2 06/11] dmapool: move debug code to own functions Keith Busch
2022-12-23 16:31   ` Christoph Hellwig
2022-12-16 20:16 ` [PATCHv2 07/11] dmapool: rearrange page alloc failure handling Keith Busch
2022-12-23 16:31   ` Christoph Hellwig
2022-12-16 20:16 ` [PATCHv2 08/11] dmapool: consolidate page initialization Keith Busch
2022-12-23 16:35   ` Christoph Hellwig
2022-12-16 20:16 ` [PATCHv2 09/11] dmapool: simplify freeing Keith Busch
2022-12-23 16:38   ` Christoph Hellwig
2022-12-27 20:21     ` Keith Busch
2022-12-16 20:16 ` [PATCHv2 10/11] dmapool: don't memset on free twice Keith Busch
2022-12-23 16:39   ` Christoph Hellwig
2022-12-16 20:16 ` [PATCHv2 11/11] dmapool: link blocks across pages Keith Busch
2022-12-17  2:39   ` kernel test robot
2022-12-17  3:49   ` kernel test robot
2022-12-23 16:58   ` Christoph Hellwig
2022-12-23 17:08     ` Tony Battersby
2022-12-23 17:15       ` Christoph Hellwig
2022-12-24 14:55         ` Keith Busch

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.