From: Jens Axboe <axboe@suse.de>
To: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: [PATCH] Time sliced cfq ver17
Date: Thu, 16 Dec 2004 16:34:16 +0100 [thread overview]
Message-ID: <20041216153416.GC23414@suse.de> (raw)
In-Reply-To: <20041215120323.GT3157@suse.de>
Hi,
2.6.10-rc3-mm1 patch:
http://www.kernel.org/pub/linux/kernel/people/axboe/patches/v2.6/2.6.10-rc3-mm1/cfq-time-slices-17-2.6.10-rc3-mm1.gz
2.6-BK patch:
http://www.kernel.org/pub/linux/kernel/people/axboe/patches/v2.6/2.6.10-rc3/cfq-time-slices-17.gz
Changes:
- Kill the spare queue logic
- wait_request should not imply that queue must be allowed to allocate a
request, otherwise a write could quickly flood the queue. Add
must_alloc to handle that and make it one-shot.
- Turn on/off idle window based on process think time and seek time.
Improve idle timer logic. The seek/think time updates toggle the
idle_window flag and increase queuing depth if we disable the idle
window.
- Improve SCSI requeing logic. Add request fully back into cfq queue but
mark it as next service once this queue gets slice time again.
- More preemption fixes. Allow new sync io to preempt equal priority
async io to improve reader fairness.
--
Jens Axboe
prev parent reply other threads:[~2004-12-16 15:34 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-15 8:20 [PATCH] Time sliced cfq ver13 Jens Axboe
2004-12-15 12:03 ` [PATCH] Time sliced cfq ver14 Jens Axboe
2004-12-16 15:34 ` Jens Axboe [this message]
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