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    SubjectRe: [Xen-devel] [patch 30/44] xen: Add support for preemption
    tgh wrote:
    > hi
    > I am using xen,and I am curious about whether Xen support the preempt
    > scheduler for the VMs or not
    > could the VM be prempted by xen to scheduler another VM?
    >

    Yes, that's the normal mode of operation. The hypervisor will timeslice
    multiple vcpus onto a single vcpu.

    This patch doesn't relate to that; it's whether a Xen Linux guest's
    kernel can be preempted to reschedule processes while running under Xen.
    The normal xen-unstable or vendor Xen kernels don't support this, but
    the mainline kernel with paravirt_ops/xen support does.

    J
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