Messages in this thread | | | From | David Howells <> | Subject | Re: [RFC] sched: implement the exclusive wait queue as a LIFO queue | Date | Wed, 28 Apr 2010 10:29:47 +0100 |
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Changli Gao <xiaosuo@gmail.com> wrote:
> If there isn't enough work to be done, we'd better not disrupt them > and leave them sleeping forever to keep the scheduler happier. Do we > have reason to keep fair to all the workers? Does it have benefit?
You've made one important assumption: the processes on the wait queue are sleeping waiting to service things... but what if the wait queue governs access to a resource, and all the processes on that wait queue need access to that resource to do things? Some of the processes waiting for it may never get a go, and so necessary work may be left undone.
So NACK.
David
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