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Re: [Xen-devel] [PATCH 6/10] Allow vcpu to pause self


  • To: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
  • From: Keir Fraser <keir@xxxxxxxxxxxxx>
  • Date: Thu, 12 Jul 2007 09:01:04 +0100
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Thu, 12 Jul 2007 00:55:40 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Ace4wFEyWBrDMwUBRbudwW+SC7WIGwLHO6q6ABLR0tAABjWo8AAFyyMWAACQPss=
  • Thread-topic: [Xen-devel] [PATCH 6/10] Allow vcpu to pause self

On 12/7/07 08:44, "Keir Fraser" <keir@xxxxxxxxxxxxx> wrote:

> How about doing the whole suspend/resume in dom0/vcpu0 context? Why switch
> to a softirq at all? You can force dom0/vcpu0 onto cpu0 temporarily by
> wrapping the suspend/resume in a pair of calls to vcpu_set_affinity().

You may need to temporarily rewrite ->schedule_tail as well, to regain
control after the scheduling softirq.

 -- Keir


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