Date: Tue, 07 Sep 2004 14:58:36 -0600 From: Scott Long <scottl@samsco.org> To: freebsd-current@FreeBSD.org Cc: re@FreeBSD.org Subject: HEADS UP: Scheduler change Message-ID: <413E20FC.80801@samsco.org>
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All, In the interest of getting RELENG_5 stable and ready for 5.3, we are going to switch the scheduler in 6-CURRENT from SCHED_ULE to SCHED_4BSD. Tests are showing that the 4BSD is a bit more stable under load than ULE, and is a LOT morestable than ULE with PREEMPTION enabled. This does not mean that ULE is being removed or that we have lost confidence in the direction and features of ULE. By changing this we can focus on stability for the rest of the RELENG_5 cycle. I'd encourage anyone who is interested in the ULE scheduler to talk to Julian Elischer and Jeff Roberson about what needs to be done with it. Once 5.3 is released we can look at switching 6-CURRENT back to ULE if it makes sense. Scott
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