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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Re: [PATCH] [RFC] Credit2 scheduler prototype
On 08/12/2009 14:48, "George Dunlap" <George.Dunlap@xxxxxxxxxxxxx> wrote: > My main concern is that sharing the runqueue between cores requires > some changes to the core context switch code. The kinks aren't 100% > worked out yet, so there's a risk that there will be an impact on the > correctness of the credit1 scheduler. Ah, if that's the problem with selecting a vcpu which happens to still be 'is_running' then I had some ideas how you could deal with that within the credit2 scheduler. If you see such a vcpu when searching the runqueue, ignore it, but set VPF_migrating. You'll then get a 'pick_cpu' callback when descheduling of the vcpu is completed. That should play nice with the lazy context switch logic while keeping things work conserving. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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