Messages in this thread | | | Subject | Re: [PATCH v2] core, x86: Add user return notifiers | From | Peter Zijlstra <> | Date | Tue, 22 Sep 2009 18:50:05 +0200 |
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On Tue, 2009-09-22 at 16:32 +0200, Ingo Molnar wrote: > * 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? > > Would be nice to convert some existing open-coded return-to-user-space > logic to this facility. One such candidate would be lockdep_sys_exit?
And here I was thinking this was one of the hottest code paths in the whole kernel...
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