Date:   Tue, 21 Feb 2023 10:02:34 -0800
From:   Christoph Hellwig <hch@infradead.org>
To:     Keith Busch <kbusch@meta.com>
Cc:     Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, Keith Busch <kbusch@kernel.org>,
        Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Subject: Re: [PATCH] dmapool: push new blocks in ascending order
Message-ID: <Y/UHOohEMg+oyO8j@infradead.org>
References: <20230221165400.1595247-1-kbusch@meta.com>
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On Tue, Feb 21, 2023 at 08:54:00AM -0800, Keith Busch wrote:
> From: Keith Busch <kbusch@kernel.org>
> 
> Some users of the dmapool need their allocations to happen in ascending
> order. The recent optimizations pushed the blocks in reverse order, so
> restore the previous behavior by linking the next available block from
> low-to-high.

Who are those users?

Also should we document this behavior somewhere so that it isn't
accidentally changed again some time in the future?