From eff0114ac3d3a20a5c93b31b00134e59bfc75189 Mon Sep 17 00:00:00 2001 From: Carsten Otte Date: Fri, 27 Jun 2008 15:05:31 +0200 Subject: [PATCH] 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 Signed-off-by: Avi Kivity --- virt/kvm/kvm_main.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 7d10dfa0d3..9ccaf8f540 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -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; -- 2.39.5