Module Name: src
Committed By: jdolecek
Date: Thu Nov 14 21:23:46 UTC 2019
Modified Files:
src/share/man/man7: sysctl.7
Log Message:
document vm.ubc_direct
To generate a diff of this commit:
cvs rdiff -u -r1.140 -r1.141 src/share/man/man7/sysctl.7
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/man7/sysctl.7
diff -u src/share/man/man7/sysctl.7:1.140 src/share/man/man7/sysctl.7:1.141
--- src/share/man/man7/sysctl.7:1.140 Mon Aug 5 22:03:10 2019
+++ src/share/man/man7/sysctl.7 Thu Nov 14 21:23:46 2019
@@ -1,4 +1,4 @@
-.\" $NetBSD: sysctl.7,v 1.140 2019/08/05 22:03:10 maya Exp $
+.\" $NetBSD: sysctl.7,v 1.141 2019/11/14 21:23:46 jdolecek Exp $
.\"
.\" Copyright (c) 1993
.\" The Regents of the University of California. All rights reserved.
@@ -29,7 +29,7 @@
.\"
.\" @(#)sysctl.3 8.4 (Berkeley) 5/9/95
.\"
-.Dd August 6, 2019
+.Dd November 14, 2019
.Dt SYSCTL 7
.Os
.Sh NAME
@@ -2531,6 +2531,12 @@ the fifth is the size of
Returns an array of
.Vt struct kinfo_vmentry
objects.
+.It Li vm.ubc_direct
+Use direct map for UBC I/O, avoiding need to map and unmap buffer memory.
+Speeds up operation for fast I/O devices like NVMe, especially
+on multi-CPU systems.
+Only available on some architectures.
+Currently still experimental, default is off.
.It Li vm.uspace ( Dv VM_USPACE )
The number of bytes allocated for each kernel stack.
.It Li vm.uvmexp ( Dv VM_UVMEXP )
