tree 81b9989c069f54e42a748c8af6a2989bdbe6a8b9
parent 21b26c08535c992802402c7ba2d789ca9e1a5707
author Rik van Riel <riel@redhat.com> 1340139064 -0400
committer Marcelo Tosatti <mtosatti@redhat.com> 1341594678 -0300

KVM: handle last_boosted_vcpu = 0 case

If last_boosted_vcpu == 0, then we fall through all test cases and
may end up with all VCPUs pouncing on vcpu 0.  With a large enough
guest, this can result in enormous runqueue lock contention, which
can prevent vcpu0 from running, leading to a livelock.

Changing < to <= makes sure we properly handle that case.

Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>