80 lines
2.9 KiB
Groff
80 lines
2.9 KiB
Groff
.\" $NetBSD: rump.halt.1,v 1.2 2010/12/12 17:15:16 pooka Exp $
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.\"
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.\" Copyright (c) 1990, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)reboot.8 8.1 (Berkeley) 6/9/93
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.\"
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.Dd December 12, 2010
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.Dt RUMP.HALT 1
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.Os
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.Sh NAME
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.Nm rump.halt
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.Nd halt a rump kernel
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.Sh SYNOPSIS
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.Nm
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.Op Fl dhn
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.Sh DESCRIPTION
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The
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.Nm
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utility exits a rump kernel.
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The file system cache, if present, is flushed.
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Since a rump kernel does not control its clients, they are not
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directly affected by
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.Nm .
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However, they will be unable to request further services from the
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halted rump kernel.
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.Pp
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The options are as follows:
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.Bl -tag -width Ds
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.It Fl d
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Create a core dump.
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The core file is saved according to standard userland program
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coredump rules, and can be later examined with a debugger.
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.It Fl h
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By default the process hosting the rump kernel exits.
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Using this option shuts down rump kernel activity, but does not
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cause the hosting process to exit.
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.It Fl n
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Do not flush the file system cache.
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This option should be used with extreme caution.
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It can be used if a virtual disk or a virtual processor is virtually on fire.
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.El
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.Sh SEE ALSO
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.Xr rump 3
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.Sh HISTORY
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The
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.Nm
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command appeared in
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.Nx 6.0 .
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.Sh CAVEATS
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While using
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.Fl h
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makes it impossible to issue further system calls, it does not necessarily
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stop all activity in a rump kernel.
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It is recommended this option is used only for debugging purposes.
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