Module Name: src
Committed By: riastradh
Date: Mon Mar 23 08:00:33 UTC 2015
Modified Files:
src/share/man/man9: uvm.9
Log Message:
Describe UFP_DIRTYONLY and UFP_BACKWARD flags to uvn_findpages.
PR kern/49335
To generate a diff of this commit:
cvs rdiff -u -r1.107 -r1.108 src/share/man/man9/uvm.9
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/share/man/man9/uvm.9
diff -u src/share/man/man9/uvm.9:1.107 src/share/man/man9/uvm.9:1.108
--- src/share/man/man9/uvm.9:1.107 Mon Jul 2 21:10:31 2012
+++ src/share/man/man9/uvm.9 Mon Mar 23 08:00:33 2015
@@ -1,4 +1,4 @@
-.\" $NetBSD: uvm.9,v 1.107 2012/07/02 21:10:31 jym Exp $
+.\" $NetBSD: uvm.9,v 1.108 2015/03/23 08:00:33 riastradh Exp $
.\"
.\" Copyright (c) 1998 Matthew R. Green
.\" All rights reserved.
@@ -466,6 +466,8 @@ The flags can be
#define UFP_NOALLOC 0x02 /* don't allocate new pages */
#define UFP_NOCACHE 0x04 /* don't return pages which already exist */
#define UFP_NORDONLY 0x08 /* don't return PG_READONLY pages */
+#define UFP_DIRTYONLY 0x10 /* stop at first clean pg, clean dirty pgs */
+#define UFP_BACKWARD 0x20 /* find pages in reverse order */
.Ed
.Pp
.Dv UFP_ALL
@@ -478,6 +480,22 @@ causes any pages which do not already ex
causes any pages which do already exist to be skipped.
.Dv UFP_NORDONLY
causes any pages which are marked PG_READONLY to be skipped.
+.Dv UFP_DIRTYONLY
+causes
+.Fn uvn_findpages
+to stop early at the first clean page, and as a side effect to mark
+each dirty page as clean.
+It is the caller's responsibility to write the pages back to permanent
+storage before unbusying them.
+.Dv UFP_BACKWARD
+causes
+.Fn uvn_findpages
+to traverse the array of pages in reverse order, starting at the end.
+If
+.Fn uvn_findpages
+returns early in this case, it will have filled
+.Li * Ns Fa npagesp
+entries at the end rather than beginning of the page array.
.Pp
.Fn uvm_vnp_setsize
sets the size of vnode
