From eff0114ac3d3a20a5c93b31b00134e59bfc75189 Mon Sep 17 00:00:00 2001
From: Carsten Otte <cotte@de.ibm.com>
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 <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
---
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 7d10dfa0d3886..9ccaf8f5402ec 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