From 44ab6b30531a8884c2b22b9cc6a4e489690bf27b Mon Sep 17 00:00:00 2001
From: alc <alc@FreeBSD.org>
Date: Thu, 28 Jun 2012 22:03:59 +0000
Subject: Avoid some unnecessary PV list locking in pmap_enter().

---
 sys/amd64/amd64/pmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'sys/amd64')

diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
index fff27dc..16eeb95 100644
--- a/sys/amd64/amd64/pmap.c
+++ b/sys/amd64/amd64/pmap.c
@@ -3570,7 +3570,7 @@ validate:
 				if ((newpte & PG_RW) == 0)
 					invlva = TRUE;
 			}
-			if ((origpte & PG_MANAGED) != 0) {
+			if ((om->aflags & PGA_WRITEABLE) != 0) {
 				CHANGE_PV_LIST_LOCK_TO_VM_PAGE(&lock, om);
 				if (TAILQ_EMPTY(&om->md.pv_list) &&
 				    ((om->flags & PG_FICTITIOUS) != 0 ||
-- 
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