Ingo Molnar wrote:
* Avi Kivity <a...@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?
Ingo
Sorry, limited bandwidth due to LinuxCon, but I like the concept, and
the previous (partial) patch was really clean. I agree with Ingo that
arch support so we can use this as a general facility would be nice, but
I don't consider that as a prerequisite for merging.
-hpa
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