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

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Message-Id: <20230126142209.b3546fc52f3f13ddcda67bac@linux-foundation.org>
Date:   Thu, 26 Jan 2023 14:22:09 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Keith Busch <kbusch@...a.com>
Cc:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        <willy@...radead.org>, <hch@....de>, <tonyb@...ernetics.com>,
        <kernel-team@...a.com>, Keith Busch <kbusch@...nel.org>
Subject: Re: [PATCHv4 00/12] dmapool enhancements

On Thu, 26 Jan 2023 13:51:13 -0800 Keith Busch <kbusch@...a.com> wrote:

> 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.

Do we have any performance testing results for realistic workloads?