Revision 66647742891153167214eb91d72b93fb61844b89 authored by John Baldwin on 22 January 2010, 17:02:07 UTC, committed by John Baldwin on 22 January 2010, 17:02:07 UTC
Adapt vfs kqfilter to the shared vnode lock used by zfs write vop. Use vnode interlock to protect the knote fields. The locking assumes that shared vnode lock is held, thus we get exclusive access to knote either by exclusive vnode lock protection, or by shared vnode lock + vnode interlock. Unlike the change in HEAD, this does not remove kl_locked() and replace it with kl_assert_locked() and kl_assert_unlocked(). Instead, the kl_locked can now be set to NULL in which case no assertion checks are performed on the lock. The vfs kqfilter code uses this mode to disable assertion checks. This preserves the existing ABI for knlist_init(). Add convenience function knlist_init_mtx to reduce number of arguments for typical knlist initialization. Reviewed by: kib
1 parent 0e497cd
mca.8
.\" Copyright (c) 2006 Marcel Moolenaar
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" $FreeBSD$
.\"
.Dd February 11, 2006
.Dt MCA 8
.Os
.Sh NAME
.Nm mca
.Nd "Machine Check Architecture control utility"
.Sh SYNOPSIS
.Nm
.Op Fl d
.Op Fl f Ar filename
.Sh DESCRIPTION
The
.Nm
utility provides minimal functionality to dump or display MCA records
that were saved by the kernel during boot.
The default behaviour of the
.Nm
utility is to display all new MCA records on stdout.
When the
.Fl d
option is given, the records are dumped in binary form.
The default file to which records are dumped is
.Pa /var/log/mca.log .
This can be changed by specifying the
.Fl f
option.
New records are appended to the dump file.
.Pp
Previously dumped records can be displayed by giving the name of
the dump file with the
.Fl f
option.
.Sh FILES
.Bl -tag -width ".Pa /var/log/mca.log" -compact
.It Pa /var/log/mca.log
default dump file
.El
.Sh HISTORY
The
.Nm
utility appeared in
.Fx 5.0
for ia64.
.Sh BUGS
The development of the
.Nm
utility is still a work in progress.
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