* [PATCH] Time sliced cfq ver13 @ 2004-12-15 8:20 Jens Axboe 2004-12-15 12:03 ` [PATCH] Time sliced cfq ver14 Jens Axboe 0 siblings, 1 reply; 3+ messages in thread From: Jens Axboe @ 2004-12-15 8:20 UTC (permalink / raw) To: Linux Kernel 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-13-2.6.10-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-13.gz Changes: - Fixup the RCU usage. Also uncovered a bug if the process exiting was active on several disks, only the first would get kicked. - Fix problem with CFQ as default at boot for IDE. IDE asks for the same request several times, this disturbed the CFQ max_depth logic. Check if a request is already in flight and allow it. -- Jens Axboe ^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH] Time sliced cfq ver14 2004-12-15 8:20 [PATCH] Time sliced cfq ver13 Jens Axboe @ 2004-12-15 12:03 ` Jens Axboe 2004-12-16 15:34 ` [PATCH] Time sliced cfq ver17 Jens Axboe 0 siblings, 1 reply; 3+ messages in thread From: Jens Axboe @ 2004-12-15 12:03 UTC (permalink / raw) To: Linux Kernel 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-14-2.6.10-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-14.gz Changes: - Fix leak of queue - Better balance when to preempt. On 8 client read workload, aggregate bandwidth would take a few seconds to build up, due to initial massive preempt generation more seeks than it should. Priority check was also reverse which showed bad results on multi-prio work loads. - Fix reversed priority check in preemption check, oops. -- Jens Axboe ^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH] Time sliced cfq ver17 2004-12-15 12:03 ` [PATCH] Time sliced cfq ver14 Jens Axboe @ 2004-12-16 15:34 ` Jens Axboe 0 siblings, 0 replies; 3+ messages in thread From: Jens Axboe @ 2004-12-16 15:34 UTC (permalink / raw) To: Linux Kernel 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 ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2004-12-16 15:34 UTC | newest] Thread overview: 3+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 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 ` [PATCH] Time sliced cfq ver17 Jens Axboe
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