Messages in this thread | | | Date | Tue, 22 Sep 2009 11:37:08 +0200 | From | Arjan van de Ven <> | Subject | Re: [PATCH v2] core, x86: Add user return notifiers |
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On Tue, 22 Sep 2009 12:25:33 +0300 Avi Kivity <avi@redhat.com> wrote:
> On 09/19/2009 09:40 AM, Avi Kivity wrote: > > Add a general per-cpu notifier that is called whenever the kernel is > > about to return to userspace. The notifier uses a thread_info flag > > and existing checks, so there is no impact on user return or context > > switch fast paths. > > > > Ingo/Peter?
isn't this like really expensive when used ?
-- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org
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