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authorGlauber Costa <glommer@redhat.com>2008-12-03 15:40:51 (GMT)
committerAvi Kivity <avi@redhat.com>2008-12-31 14:55:41 (GMT)
commit6f89724829cfd4ad6771a92fd4b8d59c90c7220c (patch)
tree8387a9838e786b687739be61eda01eb65253f844
parent7b7015914b30ad8d9136d41412c5129b9bc9af70 (diff)
downloadlinux-fsl-qoriq-6f89724829cfd4ad6771a92fd4b8d59c90c7220c.tar.xz
KVM: Really remove a slot when a user ask us so
Right now, KVM does not remove a slot when we do a register ioctl for size 0 (would be the expected behaviour). Instead, we only mark it as empty, but keep all bitmaps and allocated data structures present. It completely nullifies our chances of reusing that same slot again for mapping a different piece of memory. In this patch, we destroy rmaps, and vfree() the pointers that used to hold the dirty bitmap, rmap and lpage_info structures. Signed-off-by: Glauber Costa <glommer@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
-rw-r--r--virt/kvm/kvm_main.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index e41d39d..fd9cc79 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1020,7 +1020,10 @@ int __kvm_set_memory_region(struct kvm *kvm,
goto out_free;
}
- kvm_free_physmem_slot(&old, &new);
+ kvm_free_physmem_slot(&old, npages ? &new : NULL);
+ /* Slot deletion case: we have to update the current slot */
+ if (!npages)
+ *memslot = old;
#ifdef CONFIG_DMAR
/* map the pages in iommu page table */
r = kvm_iommu_map_pages(kvm, base_gfn, npages);