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describe UVMHIST* options.

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chs 2001-09-22 05:38:30 +00:00
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share/man/man4/options.4
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@ -1,4 +1,4 @@
.\" $NetBSD: options.4,v 1.147 2001/09/22 01:44:55 wiz Exp $ .\" $NetBSD: options.4,v 1.148 2001/09/22 05:38:30 chs Exp $
.\" .\"
.\" Copyright (c) 1996 .\" Copyright (c) 1996
.\" Perry E. Metzger. All rights reserved. .\" Perry E. Metzger. All rights reserved.
@ -297,7 +297,7 @@ for details.
If this is non-zero, enable history editing in the kernel debugger If this is non-zero, enable history editing in the kernel debugger
and set the size of the history to this value. and set the size of the history to this value.
.It Cd options DDB_ONPANIC .It Cd options DDB_ONPANIC
If set to non-zero, the DDB will be entered upon kernel panic. If set to non-zero, DDB will be entered upon kernel panic.
The default if not specified is "1". The default if not specified is "1".
Note that this sets the value of the Note that this sets the value of the
.Em ddb.onpanic .Em ddb.onpanic
@ -388,6 +388,20 @@ problems.
.It Cd options MALLOCLOGSIZE=integer .It Cd options MALLOCLOGSIZE=integer
Defines the number of entries in the malloc log. Defines the number of entries in the malloc log.
Default is 100000 entries. Default is 100000 entries.
.It Cd options UVMHIST
Enables the UVM history logs, which create in-memory traces of
various UVM activities. These logs can be displayed be calling
.Fn uvmhist_dump
or
.Fn uvm_hist
with appropriate arguments from DDB.
See the kernel source file sys/uvm/uvm_stat.c for details.
.It Cd options UVMHIST_PRINT
Prints the UVM history logs on the system console as entries are added.
Note that the output is
.Em extremely
voluminous, so this option is really only useful for debugging
the very earliest parts of kernel initialization.
.El .El
.Ss File Systems .Ss File Systems
.Bl -ohang .Bl -ohang