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Add a section documenting the sysctl(8) tunables that influence the
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.
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@ -135,6 +135,18 @@ record.
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The type specific records are defined in the
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.In sys/ktrace.h
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include file.
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.Sh SYSCTL TUNABLES
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The following
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.Xr sysctl 8
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tunables influence the behaviour of
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.Fn ktrace :
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.Bl -tag -width indent
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.It Va kern.ktrace.geniosize
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bounds the amount of data a traced I/O request will log
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to the trace file.
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.It Va kern.ktrace.request_pool
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bounds the number of trace events being logged at a time.
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.El
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.Sh RETURN VALUES
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.Rv -std ktrace
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.Sh ERRORS
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@ -162,7 +174,7 @@ The kernel was not compiled with
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support.
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.El
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.Pp
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A thread may be unable to post one or more tracing requests due to a
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A thread may be unable to log one or more tracing events due to a
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temporary shortage of resources.
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This condition is remembered by the kernel, and the next tracing request
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that succeeds will have the flag
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@ -173,7 +185,8 @@ field.
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.Sh SEE ALSO
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.Xr kdump 1 ,
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.Xr ktrace 1 ,
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.Xr utrace 2
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.Xr utrace 2 ,
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.Xr sysctl 8
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.Sh HISTORY
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The
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.Fn ktrace
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