From: kbusch@kernel.org
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org
Cc: willy@infradead.org, kernel-team@fb.com, Keith Busch <kbusch@kernel.org>
Subject: [PATCH 0/2] dmapool performance enhancements
Date: Thu, 28 Apr 2022 14:27:12 -0600 [thread overview]
Message-ID: <20220428202714.17630-1-kbusch@kernel.org> (raw)
From: Keith Busch <kbusch@kernel.org>
Allocating and freeing blocks from the dmapool iterates a list of all
allocated pages. We can save time removing the per-alloc/free list
traversal for a constant time lookup, so this series does that.
Compared to current kernel, perf record from running io_uring benchmarks
on nvme reports dma_pool_alloc() cost reduction cut in half from 0.81% to
0.41%.
Keith Busch (2):
mm/dmapool: replace linked list with xarray
mm/dmapool: link blocks across pages
mm/dmapool.c | 107 +++++++++++++++++++++++++++------------------------
1 file changed, 56 insertions(+), 51 deletions(-)
--
2.30.2
next reply other threads:[~2022-04-28 20:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-28 20:27 kbusch [this message]
2022-04-28 20:27 ` [PATCH 1/2] mm/dmapool: replace linked list with xarray kbusch
2022-04-28 21:59 ` Matthew Wilcox
2022-04-29 1:41 ` Keith Busch
2022-04-28 20:27 ` [PATCH 2/2] mm/dmapool: link blocks across pages kbusch
2022-05-27 19:35 ` [PATCH 0/2] dmapool performance enhancements Tony Battersby
2022-05-27 21:01 ` Keith Busch
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