Re: [PATCH v2] core, x86: Add user return notifiers

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 09/22/2009 06:19 PM, H. Peter Anvin wrote:
Ingo Molnar wrote:
* Avi Kivity <avi@xxxxxxxxxx> 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.

Re-ping?

If accepted, please merge just the core patch and I will carry all of them in parallel. Once tip is merged I'll drop my copy of the first patch.

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]
  Powered by Linux