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Add a section documenting the sysctl(8) tunables that influence the

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operation of ktrace(2).  Add a cross-reference to sysctl(8).  Make the
language of rev 1.22 more consistent with the rest of the manual page.
This commit is contained in:
Joseph Koshy 2003-11-11 04:59:25 +00:00
parent 669073a7e6
commit 5274183ef4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=122459
1 changed files with 15 additions and 2 deletions
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17
lib/libc/sys/ktrace.2
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@ -135,6 +135,18 @@ record.
The type specific records are defined in the
.In sys/ktrace.h
include file.
.Sh SYSCTL TUNABLES
The following
.Xr sysctl 8
tunables influence the behaviour of
.Fn ktrace :
.Bl -tag -width indent
.It Va kern.ktrace.geniosize
bounds the amount of data a traced I/O request will log
to the trace file.
.It Va kern.ktrace.request_pool
bounds the number of trace events being logged at a time.
.El
.Sh RETURN VALUES
.Rv -std ktrace
.Sh ERRORS
@ -162,7 +174,7 @@ The kernel was not compiled with
support.
.El
.Pp
A thread may be unable to post one or more tracing requests due to a
A thread may be unable to log one or more tracing events due to a
temporary shortage of resources.
This condition is remembered by the kernel, and the next tracing request
that succeeds will have the flag
@ -173,7 +185,8 @@ field.
.Sh SEE ALSO
.Xr kdump 1 ,
.Xr ktrace 1 ,
.Xr utrace 2
.Xr utrace 2 ,
.Xr sysctl 8
.Sh HISTORY
The
.Fn ktrace