From: miquels@cistron-office.nl (Miquel van Smoorenburg)
To: linux-kernel@vger.kernel.org
Subject: Re: O_DIRECT! or O_DIRECT?
Date: Wed, 4 Jul 2001 18:27:13 +0000 (UTC) [thread overview]
Message-ID: <9hvn61$rkb$1@ncc1701.cistron.net> (raw)
In-Reply-To: <E15HWsV-0000lM-00@f12.port.ru> <20010704185230.F28793@redhat.com>
In article <20010704185230.F28793@redhat.com>,
Stephen C. Tweedie <sct@redhat.com> wrote:
>For these reasons, buffered IO is often faster than O_DIRECT for pure
>sequential access. The downside it its greater CPU cost and the fact
>that it pollutes the cache (which, in turn, causes even _more_ CPU
>overhead when the VM is forced to start reclaiming old cache data to
>make room for new blocks.)
Any chance of something like O_SEQUENTIAL (like madvise(MADV_SEQUENTIAL))
Mike.
next prev parent reply other threads:[~2001-07-04 18:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-03 20:34 O_DIRECT! or O_DIRECT? Samium Gromoff
2001-07-03 20:38 ` kernel
2001-07-03 21:12 ` Anton Altaparmakov
2001-07-04 17:52 ` Stephen C. Tweedie
2001-07-04 18:27 ` Miquel van Smoorenburg [this message]
2001-07-04 18:34 ` Stephen C. Tweedie
2001-07-04 20:23 ` Miquel van Smoorenburg
2001-07-05 15:06 ` Stephen C. Tweedie
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