Re: KVM: x86: use smp_send_reschedule in kvm_vcpu_kick

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Marcelo Tosatti wrote:
OK, reworked patch:
- change ia64 in addition to x86
- add comment on smp send reschedule handlers about KVM's usage

Untested on IA64.

KVM: use smp_send_reschedule in kvm_vcpu_kick

KVM uses a function call IPI to cause the exit of a guest running on a
physical cpu. For virtual interrupt notification there is no need to
wait on IPI receival, or to execute any function.

This is exactly what the reschedule IPI does, without the overhead
of function IPI. So use it instead of smp_call_function_single in
kvm_vcpu_kick.

Also change the "guest_mode" variable to a bit in vcpu->requests, and
use that to collapse multiple IPI's that would be issued between the
first one and zeroing of guest mode.

This allows kvm_vcpu_kick to called with interrupts disabled.

Looks good. Will wait for Xiantao's test-n-ack before applying.

--
error compiling committee.c: too many arguments to function

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