[PATCHv4 00/12] dmapool enhancements

[Keith Busch]

From: Keith Busch <kbusch@xxxxxxxxxx>

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

Changes since v4:

  Added received reviews

  Applied comments from Christoph:
    Combined all debug code in one #ifdef block
    Fixed some whitespace
    
Keith Busch (8):
  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
  dmapool: create/destroy cleanup

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      | 402 ++++++++++++++++++++++------------------------
 mm/dmapool_test.c | 147 +++++++++++++++++
 4 files changed, 350 insertions(+), 209 deletions(-)
 create mode 100644 mm/dmapool_test.c

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2.30.2