KVM: Optimize searching for highest IRR

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Most of the time IRR is empty, so instead of scanning the whole IRR on
each VM entry keep a variable that tells us if IRR is not empty. IRR
will have to be scanned twice on each IRQ delivery, but this is much
more rare than VM entry.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

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Gleb Natapov 2009-06-11 11:06:51 +03:00 • committed by Avi Kivity

parent 6edf14d8d0

commit 33e4c68656

2 changed files with 22 additions and 3 deletions

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arch/x86/kvm/lapic.c

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1

arch/x86/kvm/lapic.h

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