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author | alfred <alfred@FreeBSD.org> | 2001-07-18 06:09:13 +0000 |
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committer | alfred <alfred@FreeBSD.org> | 2001-07-18 06:09:13 +0000 |
commit | 8ca85b43c8f47d7323879ed5a9d18c98f60780c9 (patch) | |
tree | f972da79d2f43bf37f0f1161b80c54627e9e0d63 /share/man/man9/vm_page_wakeup.9 | |
parent | 27eac0636289d676d2ef62bb9328d67b8944db8b (diff) | |
download | FreeBSD-src-8ca85b43c8f47d7323879ed5a9d18c98f60780c9.zip FreeBSD-src-8ca85b43c8f47d7323879ed5a9d18c98f60780c9.tar.gz |
Document some of the kernel vm_page API as well as the pbuf API.
Submitted by: Chad David <davidc@acns.ab.ca>
Diffstat (limited to 'share/man/man9/vm_page_wakeup.9')
-rw-r--r-- | share/man/man9/vm_page_wakeup.9 | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/share/man/man9/vm_page_wakeup.9 b/share/man/man9/vm_page_wakeup.9 new file mode 100644 index 0000000..4ca59c2 --- /dev/null +++ b/share/man/man9/vm_page_wakeup.9 @@ -0,0 +1,76 @@ +.\" +.\" Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice(s), this list of conditions and the following disclaimer as +.\" the first lines of this file unmodified other than the possible +.\" addition of one or more copyright notices. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice(s), this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY +.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +.\" DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY +.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +.\" CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH +.\" DAMAGE. +.\" +.\" $FreeBSD$ +.\" +.Dd July 14, 2001 +.Dt VM_PAGE_BUSY 9 +.Os +.Sh NAME +.Nm vm_page_busy , +.Nm vm_page_flash , +.Nm vm_page_wakeup +.Nd "handle the busying and unbusying of a page" +.Sh SYNOPSIS +.In sys/param.h +.In vm/vm.h +.In vm/vm_page.h +.Ft void +.Fn vm_page_busy "vm_page_t m" +.Ft void +.Fn vm_page_flash "vm_page_t m" +.Ft void +.Fn vm_page_wakeup "vm_page_t m" +.Sh DESCRIPTION +These functions handle the busying, unbusying and notification of the unbusying +of a page. +.Pp +.Fn vm_page_busy +sets the +.Dv PG_BUSY +flag in the page. +.Pp +.Fn vm_page_flash +checks to see if there is anybody waiting on the page +.Dv ( PG_WANTED +will be set), and if so, clears the +.Dv PG_WANTED +flag and notifies whoever is waiting via +.Fn wakeup . +.Pp +.Fn vm_page_wakeup +clears the +.Dv PG_BUSY +flag on the page, and calls +.Fn vm_page_flash +in case somebody has been waiting for it. +.Pp +.Sh SEE ALSO +.Xr vm_page_sleep_busy 9 , +.Xr wakeup 9 +.Sh AUTHORS +This man page was written by +.An Chad David Aq davidc@acns.ab.ca . |