linux-kernel - [PATCHv4 00/12] dmapool enhancements

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Date:   Thu, 26 Jan 2023 13:51:13 -0800
From:   Keith Busch <kbusch@...a.com>
To:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        <willy@...radead.org>, <hch@....de>, <tonyb@...ernetics.com>,
        <akpm@...ux-foundation.org>
CC:     <kernel-team@...a.com>, Keith Busch <kbusch@...nel.org>
Subject: [PATCHv4 00/12] dmapool enhancements

From: Keith Busch <kbusch@...nel.org>

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

-- 
2.30.2