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[Xen-devel] Re: [PATCH] Don't assume the vcpu_id is continous in alloc_v

To: "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-devel] Re: [PATCH] Don't assume the vcpu_id is continous in alloc_vcpu
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Thu, 12 Nov 2009 11:31:58 +0000
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Thread-topic: [PATCH] Don't assume the vcpu_id is continous in alloc_vcpu
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On 12/11/2009 11:08, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> wrote:

> Currently in alloc_vcpu, it assumes the vcpu is allocated with vcpu_id is
> continous.
> When cpu hot-added, this assumption is broken because the hot-added CPU may be
> brougt online by dom0 in arbitrary order. This patch try to link the new vcpu
> to the end of the link.
> Signed-off-by: Jiang, Yunhong <yunhong.jiang@xxxxxxxxx>

Is this something to do with allocating vcpus for the idle domain?

If so, I suggest we just allocate vcpu_ids sequentially on-demand. I can
work up a patch for you to test if you like.

 -- Keir

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