Author: kib
Date: Sat Sep 27 07:54:27 2014
New Revision: 272202
URL: http://svnweb.freebsd.org/changeset/base/272202
Log:
MFC r272036:
Avoid calling vm_map_pmap_enter() for the MADV_WILLNEED on the wired
entry, the pages must be already mapped.
Approved by: re (gjb)
Modified:
stable/10/sys/vm/vm_map.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/vm/vm_map.c
==============================================================================
--- stable/10/sys/vm/vm_map.c Sat Sep 27 07:04:12 2014 (r272201)
+++ stable/10/sys/vm/vm_map.c Sat Sep 27 07:54:27 2014 (r272202)
@@ -2209,7 +2209,14 @@ vm_map_madvise(
vm_object_madvise(current->object.vm_object, pstart,
pend, behav);
- if (behav == MADV_WILLNEED) {
+
+ /*
+ * Pre-populate paging structures in the
+ * WILLNEED case. For wired entries, the
+ * paging structures are already populated.
+ */
+ if (behav == MADV_WILLNEED &&
+ current->wired_count == 0) {
vm_map_pmap_enter(map,
useStart,
current->protection,
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