From: Rik van Riel <riel@redhat.com>
Date: Tue, 19 Jun 2012 20:51:04 +0000 (-0400)
Subject: KVM: handle last_boosted_vcpu = 0 case
X-Git-Tag: v3.6-rc1~124^2~45
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5cfc2aabcb282f4554e7086c9893b386ad6ba9d4;p=pandora-kernel.git

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>
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