Messages in this thread | | | Date | Thu, 27 Apr 2017 14:00:16 +0200 | From | Cornelia Huck <> | Subject | Re: [PATCH v2 4/9] KVM: mark requests that do not need a wakeup |
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On Wed, 26 Apr 2017 22:32:22 +0200 Radim Krčmář <rkrcmar@redhat.com> wrote:
> Some operations must ensure that the guest is not running with stale > data, but if the guest is halted, then the update can wait until another > event happens. kvm_make_all_requests() currently doesn't wake up, so we > can mark all requests used with it. > > First 8 bits were arbitrarily reserved for request numbers. > > Most uses of requests have the request type as a constant, so a compiler > will optimize the '&'. > > An alternative would be to have an inline function that would return > whether the request needs a wake-up or not, but I like this one better > even though it might produce worse assembly. > > Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> > --- > v2: use GENMASK [Marc] > --- > arch/arm/include/asm/kvm_host.h | 2 +- > arch/arm64/include/asm/kvm_host.h | 2 +- > arch/x86/include/asm/kvm_host.h | 6 +++--- > include/linux/kvm_host.h | 12 +++++++----- > 4 files changed, 12 insertions(+), 10 deletions(-)
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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