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Explicitly document previously undocumented (and changed) semantics 

of pmap_clear_reference and pmap_clear_modify.
This commit is contained in:
eeh 2002-03-28 18:22:20 +00:00
parent 67c9b24c04
commit fe394d06b6
1 changed files with 14 additions and 2 deletions
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16
share/man/man9/pmap.9
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@ -1,4 +1,4 @@
.\" $NetBSD: pmap.9,v 1.12 2002/02/13 08:18:48 ross Exp $
.\" $NetBSD: pmap.9,v 1.13 2002/03/28 18:22:20 eeh Exp $
.\"
.\" Copyright (c) 2000, 2001 The NetBSD Foundation, Inc.
.\" All rights reserved.
@ -308,7 +308,19 @@ be cleared is when the virtual memory system explicitly calls the
.Fn pmap_clear_modify
and
.Fn pmap_clear_reference
functions.
functions. These functions also need to do whatever is necessary
to restart the collection of state information for that page,
including possibly calling
.Fn pmap_page_protect
if the
.Nm
is doing modified/referenced emulation.
.\"
.\" Resetting ref/mod gathering inside of pmap_clear_modify() and
.\" pmap_clear_reference began with UBC. Pre-UBC UVM required the
.\" opposite behavior or it would discover it modified a page trying
.\" to write it out and get very confused.
.\"
.Ss STATISTICS
The
.Nm