KVM: MMU: fix missing locking in alloc_mmu_pages

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n_requested_mmu_pages/n_free_mmu_pages are used by
kvm_mmu_change_mmu_pages to calculate the number of pages to zap.

alloc_mmu_pages, called from the vcpu initialization path, modifies this
variables without proper locking, which can result in a negative value
in kvm_mmu_change_mmu_pages (say, with cpu hotplug).

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

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Marcelo Tosatti 2009-07-15 15:34:41 -03:00 • committed by Avi Kivity

parent 3662cb1cd6

commit 6a1ac77110

1 changed files with 2 additions and 0 deletions

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arch/x86/kvm/mmu.c

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