Commit eff0114a authored Jun 27, 2008 by Carsten Otte Committed by Avi Kivity Jul 20, 2008

KVM: s390: dont allocate dirty bitmap



This patch #ifdefs the bitmap array for dirty tracking. We don't have dirty
tracking on s390 today, and we'd love to use our storage keys to store the
dirty information for migration. Therefore, we won't need this array at all,
and due to our limited amount of vmalloc space this limits the amount of guests
we can run.

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

parent f8b78fa3

virt/kvm/kvm_main.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -359,6 +359,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
		r = -ENOMEM;

		/* Allocate if a slot is being created */
		#ifndef CONFIG_S390
		if (npages && !new.rmap) {
		new.rmap = vmalloc(npages * sizeof(struct page *));

		@@ -399,6 +400,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
		goto out_free;
		memset(new.dirty_bitmap, 0, dirty_bytes);
		}
		#endif /* not defined CONFIG_S390 */

		if (mem->slot >= kvm->nmemslots)
		kvm->nmemslots = mem->slot + 1;

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