linux-kernel - [PATCH 30/55] KVM: Make mark_page_dirty() work for aliased pages too.

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Message-Id: <1198667160-22953-31-git-send-email-avi@qumranet.com>
Date:	Wed, 26 Dec 2007 13:05:35 +0200
From:	Avi Kivity <avi@...ranet.com>
To:	linux-kernel@...r.kernel.org, kvm-devel@...ts.sourceforge.net
Cc:	Uri Lublin <uril@...ranet.com>
Subject: [PATCH 30/55] KVM: Make mark_page_dirty() work for aliased pages too.

From: Uri Lublin <uril@...ranet.com>

Recommended by Izik Eidus.

Signed-off-by: Uri Lublin <uril@...ranet.com>
Signed-off-by: Avi Kivity <avi@...ranet.com>
---
 drivers/kvm/kvm_main.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 27f3a6e..ad4c84c 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -796,11 +796,11 @@ int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len)
 }
 EXPORT_SYMBOL_GPL(kvm_clear_guest);
 
-/* WARNING: Does not work on aliased pages. */
 void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
 {
 	struct kvm_memory_slot *memslot;
 
+	gfn = unalias_gfn(kvm, gfn);
 	memslot = __gfn_to_memslot(kvm, gfn);
 	if (memslot && memslot->dirty_bitmap) {
 		unsigned long rel_gfn = gfn - memslot->base_gfn;
-- 
1.5.3.7

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