Author: kib
Date: Sat Jul 1 03:39:38 2017
New Revision: 320526
URL: https://svnweb.freebsd.org/changeset/base/320526
Log:
MFC r320316:
Do not try to unmark MAP_ENTRY_IN_TRANSITION marked by other thread.
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 Jul 1 03:38:12 2017 (r320525)
+++ stable/10/sys/vm/vm_map.c Sat Jul 1 03:39:38 2017 (r320526)
@@ -2658,9 +2658,6 @@ done:
}
for (entry = first_entry; entry != &map->header && entry->start < end;
entry = entry->next) {
- if ((entry->eflags & MAP_ENTRY_WIRE_SKIPPED) != 0)
- goto next_entry_done;
-
/*
* If VM_MAP_WIRE_HOLESOK was specified, an empty
* space in the unwired region could have been mapped
@@ -2668,7 +2665,7 @@ done:
* pages or draining MAP_ENTRY_IN_TRANSITION.
* Moreover, another thread could be simultaneously
* wiring this new mapping entry. Detect these cases
- * and skip any entries marked as in transition by us.
+ * and skip any entries marked as in transition not by us.
*/
if ((entry->eflags & MAP_ENTRY_IN_TRANSITION) == 0 ||
entry->wiring_thread != curthread) {
@@ -2676,6 +2673,9 @@ done:
("vm_map_wire: !HOLESOK and new/changed entry"));
continue;
}
+
+ if ((entry->eflags & MAP_ENTRY_WIRE_SKIPPED) != 0)
+ goto next_entry_done;
if (rv == KERN_SUCCESS) {
if (user_wire)
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