Module Name: src
Committed By: mrg
Date: Sun Jan 13 06:59:15 UTC 2019
Modified Files:
src/share/man/man9: pmap.9
Log Message:
add a note about pmap_activate() and pmap_deactivate() not being allow to block.
To generate a diff of this commit:
cvs rdiff -u -r1.44 -r1.45 src/share/man/man9/pmap.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/pmap.9
diff -u src/share/man/man9/pmap.9:1.44 src/share/man/man9/pmap.9:1.45
--- src/share/man/man9/pmap.9:1.44 Thu Feb 16 12:10:10 2012
+++ src/share/man/man9/pmap.9 Sun Jan 13 06:59:15 2019
@@ -1,4 +1,4 @@
-.\" $NetBSD: pmap.9,v 1.44 2012/02/16 12:10:10 yamt Exp $
+.\" $NetBSD: pmap.9,v 1.45 2019/01/13 06:59:15 mrg Exp $
.\"
.\" Copyright (c) 2000, 2001, 2002 The NetBSD Foundation, Inc.
.\" All rights reserved.
@@ -27,7 +27,7 @@
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
-.Dd February 16, 2012
+.Dd January 13, 2019
.Dt PMAP 9
.Os
.Sh NAME
@@ -764,6 +764,12 @@ may not always be called when
is the current lwp.
.Fn pmap_activate
must be able to handle this scenario.
+.Pp
+The
+.Fn pmap_activate
+call, like
+.Fn pmap_deactivate ,
+must never block, as it is used for context switching.
.It void Fn "pmap_deactivate" "struct lwp *l"
Deactivate the physical map used by the process behind lwp
.Fa l .
@@ -775,6 +781,10 @@ Like
may not always be called when
.Fa l
is the current lwp.
+.Pp
+As above,
+.Fn pmap_deactivate
+must never block.
.It void Fn "pmap_zero_page" "paddr_t pa"
Zero the PAGE_SIZE sized region starting at physical address
.Fa pa .
