RUMPUSER(3) BSD Library Functions Manual RUMPUSER(3)NAME
rumpuser -- rump hypervisor interface
LIBRARY
rump User Library (librumpuser, -lrumpuser)
SYNOPSIS
#include <rump/rumpuser.h>
DESCRIPTION
rumpuser is the hypervisor interface for rump(3) style kernel virtualization. A virtual rump kernel can make calls to the host operating
system libraries and kernel (system calls) using rumpuser interfaces. Any "slow" hypervisor calls such as file I/O, sychronization wait, or
sleep will cause rump to unschedule the calling kernel thread from the virtual CPU and free it for other consumers. When the hypervisor call
returns to the kernel, a new scheduling operation takes place.
For example, rump implements kernel threads directly as hypervisor calls to host pthread(3). This avoids the common virtualization drawback
of multiple overlapping and possibly conflicting implementations of same functionality in the software stack.
The rumpuser interface is still under development and interface documentation is available only in source form from src/lib/librumpuser.
SEE ALSO rump(3)BSD March 1, 2010 BSD
Check Out this Related Man Page
RUMP.HALT(1) BSD General Commands Manual RUMP.HALT(1)NAME
rump.halt -- halt a rump kernel
SYNOPSIS
rump.halt [-dhn]
DESCRIPTION
The rump.halt utility exits a rump kernel. The file system cache, if present, is flushed. Since a rump kernel does not control its clients,
they are not directly affected by rump.halt. However, they will be unable to request further services from the halted rump kernel.
The options are as follows:
-d Create a core dump. The core file is saved according to standard userland program coredump rules, and can be later examined with a
debugger.
-h By default the process hosting the rump kernel exits. Using this option shuts down rump kernel activity, but does not cause the
hosting process to exit.
-n Do not flush the file system cache. This option should be used with extreme caution. It can be used if a virtual disk or a virtual
processor is virtually on fire.
SEE ALSO rump(3)HISTORY
The rump.halt command appeared in NetBSD 6.0.
CAVEATS
While using -h makes it impossible to issue further system calls, it does not necessarily stop all activity in a rump kernel. It is recom-
mended this option is used only for debugging purposes.
BSD December 12, 2010 BSD
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