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.Dd April 20, 2010
.Os
.Dt DSCHEDCTL 8
.Sh NAME
.Nm dschedctl
.Nd manipulate disk policies
.Sh SYNOPSIS
.Nm
.Fl l
.Op Ar disk
.Nm
.Fl p
.Nm
.Op Fl v
.Fl s Ar policy
.Op Ar disk
.Nm
.Fl h
.Sh DESCRIPTION
The
.Nm
provides an interface to manipulate the in-kernel
disk scheduler framework.
.Pp
The options are as follows:
.Bl -tag -width indent
.It Fl h
Shows a usage message with a short description of
.Nm Ap s
options.
.It Fl l Op Ar disk
If
.Ar disk
is specified, the policy currently assigned to
.Ar disk
is shown.
Otherwise all disks and their respective policies are shown.
.It Fl p
List all available dsched policies.
Any of these policies can be set on any disk.
.It Fl s Ar policy Op Ar disk
Sets the dsched policy of
.Ar disk
if specified, or all disks if not, to
.Ar policy .
If the verbose mode is enabled, a message will be printed for each successful
policy change.
.It Fl v
Enables verbose mode.
.El
.Sh HISTORY
The
.Nm
utility appeared in
.Dx 2.7 .
.Sh AUTHORS
.An Alex Hornung