From: Christoph Hellwig <hch@infradead.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: "linux-block@vger.kernel.org" <linux-block@vger.kernel.org>
Subject: Re: [PATCH] block: remove plug based merging
Date: Thu, 14 Oct 2021 06:20:35 +0100 [thread overview]
Message-ID: <YWe+I6pG4zQxvGDm@infradead.org> (raw)
In-Reply-To: <f17bf111-d625-88a1-238c-842e11b10c55@kernel.dk>
On Tue, Oct 12, 2021 at 12:12:39PM -0600, Jens Axboe wrote:
> It's expensive to browse the whole plug list for merge opportunities at
> the IOPS rates that modern storage can do. For sequential IO, the one-hit
> cached merge should suffice on fast drives, and for rotational storage the
> IO scheduler will do a more exhaustive lookup based merge anyway.
I don't really want to argue, but maybe some actual measurements to
support the above claims would be useful in the commit log?
next prev parent reply other threads:[~2021-10-14 5:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-12 18:12 [PATCH] block: remove plug based merging Jens Axboe
2021-10-14 5:20 ` Christoph Hellwig [this message]
2021-10-14 12:50 ` Jens Axboe
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