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authorMarcelo Tosatti <mtosatti@redhat.com>2009-12-23 19:35:21 +0300
committerMarcelo Tosatti <mtosatti@redhat.com>2010-03-01 18:35:44 +0300
commitbc6678a33d9b952981a8e44a4f876c3ad64ca4d8 (patch)
treee26027179eb0d76f234509145a395dd6e5910074 /arch/ia64
parent3ad26d8139a82b0510b1e0435ee82ae461d33401 (diff)
downloadlinux-bc6678a33d9b952981a8e44a4f876c3ad64ca4d8.tar.xz
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')
-rw-r--r--arch/ia64/kvm/kvm-ia64.c4
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;
}