| commit | 6a1ac77110ee3e8d8dfdef8442f3b30b3d83e6a2 | |
| author | Marcelo Tosatti <mtosatti@redhat.com> | |
| Wed, 15 Jul 2009 18:34:41 +0000 (15 15:34 -0300) | ||
| committer | Avi Kivity <avi@redhat.com> | |
| Thu, 10 Sep 2009 05:33:14 +0000 (10 08:33 +0300) | ||
| tree | 8ca7be75dcdd59b271869b8a002faaf8a4fa8857 | treesnapshot (tar.gz zip) |
| parent | 3662cb1cd6ed26873ca808f3e16cc54246ad40ca | commitdiff |
KVM: MMU: fix missing locking in alloc_mmu_pages
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>
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>
| arch/x86/kvm/mmu.c | diffblobblamehistory |