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authorIzik Eidus <izike@localhost.localdomain>2007-11-20 11:49:33 +0200
committerAvi Kivity <avi@qumranet.com>2008-01-30 17:53:09 +0200
commitb4231d61807cac8d9d257eb6979c1685fa9a171f (patch)
tree36b2064c0df4a2b2e11c5d9a2221c097bb0c7be9 /drivers/kvm/kvm_main.c
parentKVM: MMU: Fix potential memory leak with smp real-mode (diff)
downloadlinux-dev-b4231d61807cac8d9d257eb6979c1685fa9a171f.tar.xz
linux-dev-b4231d61807cac8d9d257eb6979c1685fa9a171f.zip
KVM: MMU: Selectively set PageDirty when releasing guest memory
Improve dirty bit setting for pages that kvm release, until now every page that we released we marked dirty, from now only pages that have potential to get dirty we mark dirty. Signed-off-by: Izik Eidus <izike@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/kvm_main.c')
-rw-r--r--drivers/kvm/kvm_main.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 4e1bd9488470..729573b844e5 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -543,13 +543,19 @@ struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
EXPORT_SYMBOL_GPL(gfn_to_page);
-void kvm_release_page(struct page *page)
+void kvm_release_page_clean(struct page *page)
+{
+ put_page(page);
+}
+EXPORT_SYMBOL_GPL(kvm_release_page_clean);
+
+void kvm_release_page_dirty(struct page *page)
{
if (!PageReserved(page))
SetPageDirty(page);
put_page(page);
}
-EXPORT_SYMBOL_GPL(kvm_release_page);
+EXPORT_SYMBOL_GPL(kvm_release_page_dirty);
static int next_segment(unsigned long len, int offset)
{
@@ -1055,7 +1061,7 @@ static struct page *kvm_vm_nopage(struct vm_area_struct *vma,
/* current->mm->mmap_sem is already held so call lockless version */
page = __gfn_to_page(kvm, pgoff);
if (is_error_page(page)) {
- kvm_release_page(page);
+ kvm_release_page_clean(page);
return NOPAGE_SIGBUS;
}
if (type != NULL)