Fri Dec 2 16:54:32 2011 UTC ()
update


(yamt)
diff -r1.106 -r1.106.4.1 src/share/man/man9/uvm.9
cvs diff -r1.106 -r1.106.4.1 src/share/man/man9/uvm.9 (expand / switch to unified diff)

--- src/share/man/man9/uvm.9 2011/06/01 02:22:18 1.106
+++ src/share/man/man9/uvm.9 2011/12/02 16:54:32 1.106.4.1
@@ -1,14 +1,14 @@ @@ -1,14 +1,14 @@
1.\" $NetBSD: uvm.9,v 1.106 2011/06/01 02:22:18 rmind Exp $ 1.\" $NetBSD: uvm.9,v 1.106.4.1 2011/12/02 16:54:32 yamt Exp $
2.\" 2.\"
3.\" Copyright (c) 1998 Matthew R. Green 3.\" Copyright (c) 1998 Matthew R. Green
4.\" All rights reserved. 4.\" All rights reserved.
5.\" 5.\"
6.\" Redistribution and use in source and binary forms, with or without 6.\" Redistribution and use in source and binary forms, with or without
7.\" modification, are permitted provided that the following conditions 7.\" modification, are permitted provided that the following conditions
8.\" are met: 8.\" are met:
9.\" 1. Redistributions of source code must retain the above copyright 9.\" 1. Redistributions of source code must retain the above copyright
10.\" notice, this list of conditions and the following disclaimer. 10.\" notice, this list of conditions and the following disclaimer.
11.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" 2. Redistributions in binary form must reproduce the above copyright
12.\" notice, this list of conditions and the following disclaimer in the 12.\" notice, this list of conditions and the following disclaimer in the
13.\" documentation and/or other materials provided with the distribution. 13.\" documentation and/or other materials provided with the distribution.
14.\" 14.\"
@@ -179,33 +179,47 @@ The flags can be any of @@ -179,33 +179,47 @@ The flags can be any of
179.Ed 179.Ed
180.Pp 180.Pp
181.Dv UVM_PGA_USERESERVE 181.Dv UVM_PGA_USERESERVE
182means to allocate a page even if that will result in the number of free pages 182means to allocate a page even if that will result in the number of free pages
183being lower than 183being lower than
184.Dv uvmexp.reserve_pagedaemon 184.Dv uvmexp.reserve_pagedaemon
185(if the current thread is the pagedaemon) or 185(if the current thread is the pagedaemon) or
186.Dv uvmexp.reserve_kernel 186.Dv uvmexp.reserve_kernel
187(if the current thread is not the pagedaemon). 187(if the current thread is not the pagedaemon).
188.Dv UVM_PGA_ZERO 188.Dv UVM_PGA_ZERO
189causes the returned page to be filled with zeroes, either by allocating it 189causes the returned page to be filled with zeroes, either by allocating it
190from a pool of pre-zeroed pages or by zeroing it in-line as necessary. 190from a pool of pre-zeroed pages or by zeroing it in-line as necessary.
191.Pp 191.Pp
 192While
 193.Fn uvm_pagealloc
 194does never wait for memory available by itself, it can block for mutexes
 195internally.
 196.Pp
192.Fn uvm_pagerealloc 197.Fn uvm_pagerealloc
193reallocates page 198reallocates page
194.Fa pg 199.Fa pg
195to a new object 200to a new object
196.Fa newobj , 201.Fa newobj ,
197at a new offset 202at a new offset
198.Fa newoff . 203.Fa newoff .
 204If the
 205.Fa newobj
 206is
 207.Dv NULL ,
 208.Fa newoff
 209is ignored and the page
 210.Fa pg
 211is just detached from the current object.
 212Currently, only the latter case is implemented.
199.Pp 213.Pp
200.Fn uvm_pagefree 214.Fn uvm_pagefree
201frees the physical page 215frees the physical page
202.Fa pg . 216.Fa pg .
203If the content of the page is known to be zero-filled, 217If the content of the page is known to be zero-filled,
204caller should set 218caller should set
205.Dv PG_ZERO 219.Dv PG_ZERO
206in pg-\*[Gt]flags so that the page allocator will use 220in pg-\*[Gt]flags so that the page allocator will use
207the page to serve future 221the page to serve future
208.Dv UVM_PGA_ZERO 222.Dv UVM_PGA_ZERO
209requests efficiently. 223requests efficiently.
210.Pp 224.Pp
211.Fn uvm_pglistalloc 225.Fn uvm_pglistalloc