Module Name: src
Committed By: yamt
Date: Fri Dec 2 16:54:32 UTC 2011
Modified Files:
src/share/man/man9 [yamt-pagecache]: uvm.9
Log Message:
update
To generate a diff of this commit:
cvs rdiff -u -r1.106 -r1.106.4.1 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.9:1.106 src/share/man/man9/uvm.9:1.106.4.1
--- src/share/man/man9/uvm.9:1.106 Wed Jun 1 02:22:18 2011
+++ src/share/man/man9/uvm.9 Fri Dec 2 16:54:32 2011
@@ -1,4 +1,4 @@
-.\" $NetBSD: uvm.9,v 1.106 2011/06/01 02:22:18 rmind Exp $
+.\" $NetBSD: uvm.9,v 1.106.4.1 2011/12/02 16:54:32 yamt Exp $
.\"
.\" Copyright (c) 1998 Matthew R. Green
.\" All rights reserved.
@@ -189,6 +189,11 @@ being lower than
causes the returned page to be filled with zeroes, either by allocating it
from a pool of pre-zeroed pages or by zeroing it in-line as necessary.
.Pp
+While
+.Fn uvm_pagealloc
+does never wait for memory available by itself, it can block for mutexes
+internally.
+.Pp
.Fn uvm_pagerealloc
reallocates page
.Fa pg
@@ -196,6 +201,15 @@ to a new object
.Fa newobj ,
at a new offset
.Fa newoff .
+If the
+.Fa newobj
+is
+.Dv NULL ,
+.Fa newoff
+is ignored and the page
+.Fa pg
+is just detached from the current object.
+Currently, only the latter case is implemented.
.Pp
.Fn uvm_pagefree
frees the physical page
