[src/trunk]: src/sys/uvm skip busy anon pages in uvm_map_clean().

[chs <chs%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/0ea58969758a
branches:  trunk
changeset: 335782:0ea58969758a
user:      chs <chs%NetBSD.org@localhost>
date:      Fri Jan 23 16:13:53 2015 +0000

description:
skip busy anon pages in uvm_map_clean().
we shouldn't be messing with pages that someone else has busy,
and uvm_map_clean() is just advisory for amap mappings.

diffstat:

 sys/uvm/uvm_map.c |  7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diffs (28 lines):

diff -r 6fd1b50f453c -r 0ea58969758a sys/uvm/uvm_map.c
--- a/sys/uvm/uvm_map.c Fri Jan 23 15:17:58 2015 +0000
+++ b/sys/uvm/uvm_map.c Fri Jan 23 16:13:53 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvm_map.c,v 1.331 2014/10/26 01:42:07 christos Exp $   */
+/*     $NetBSD: uvm_map.c,v 1.332 2015/01/23 16:13:53 chs Exp $        */
 
 /*
  * Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -66,7 +66,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uvm_map.c,v 1.331 2014/10/26 01:42:07 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uvm_map.c,v 1.332 2015/01/23 16:13:53 chs Exp $");
 
 #include "opt_ddb.h"
 #include "opt_uvmhist.h"
@@ -3798,6 +3798,9 @@
                        if (pg == NULL) {
                                continue;
                        }
+                       if (pg->flags & PG_BUSY) {
+                               continue;
+                       }
 
                        switch (flags & (PGO_CLEANIT|PGO_FREE|PGO_DEACTIVATE)) {