On 02/07/2011 06:59 PM, Jan Kiszka wrote:
> > (well, actually, cpufreq_notifier and kvm_arch_hardware_enable are > already non preemptible, and the stats code should just go away?) The stats code is trivial to convert, so it doesn't matter.
Removal is easier.
But what about mmu_shrink and its list_move_tail? How is this synchronized against kvm_destroy_vm - already today?
kvm_destroy_vm() takes kvm_lock. If a vm is destroyed before mmu_shrink(), mmu_shrink() will never see it. If we reach mmu_shrink() before kvm_destroy_vm(), the latter will wait until mmu_shrink() is done.
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