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| author | Marcelo Tosatti <mtosatti@redhat.com> | 2009-12-23 14:35:21 -0200 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2010-03-01 12:35:44 -0300 |
| commit | bc6678a33d9b952981a8e44a4f876c3ad64ca4d8 (patch) | |
| tree | e26027179eb0d76f234509145a395dd6e5910074 /arch/ia64/kvm/kvm-ia64.c | |
| parent | 3ad26d8139a82b0510b1e0435ee82ae461d33401 (diff) | |
| download | talos-obmc-linux-bc6678a33d9b952981a8e44a4f876c3ad64ca4d8.tar.gz talos-obmc-linux-bc6678a33d9b952981a8e44a4f876c3ad64ca4d8.zip | |
KVM: introduce kvm->srcu and convert kvm_set_memory_region to SRCU update
Use two steps for memslot deletion: mark the slot invalid (which stops
instantiation of new shadow pages for that slot, but allows destruction),
then instantiate the new empty slot.
Also simplifies kvm_handle_hva locking.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/ia64/kvm/kvm-ia64.c')
| -rw-r--r-- | arch/ia64/kvm/kvm-ia64.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c index 0757c7027986..b2e4d16dd39e 100644 --- a/arch/ia64/kvm/kvm-ia64.c +++ b/arch/ia64/kvm/kvm-ia64.c @@ -1382,7 +1382,7 @@ static void kvm_release_vm_pages(struct kvm *kvm) int i, j; unsigned long base_gfn; - slots = kvm->memslots; + slots = rcu_dereference(kvm->memslots); for (i = 0; i < slots->nmemslots; i++) { memslot = &slots->memslots[i]; base_gfn = memslot->base_gfn; @@ -1837,6 +1837,7 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot; int is_dirty = 0; + down_write(&kvm->slots_lock); spin_lock(&kvm->arch.dirty_log_lock); r = kvm_ia64_sync_dirty_log(kvm, log); @@ -1856,6 +1857,7 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, } r = 0; out: + up_write(&kvm->slots_lock); spin_unlock(&kvm->arch.dirty_log_lock); return r; } |
