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Jeff Roberson 9c0cdb8253 - Don't free snapdata structures when they are no longer in use.
Keeping the lockmgr lock valid allows us to switch the v_lock pointer
   in snapshot vnodes between the embedded lockmgr lock and snapdata
   lock without needing the vnode interlock to protect against races
 - Keep unused snapdata structures in a list.
 - Add a function to lock the devvp and allocate a snapdata to it or
   acquire a new one without races.  The old function was safe from
   creation races because we set the mount flag when creating snapshots
   and thus serializing them.  However, it might have been subject to
   destroying races.

Reviewed by:	tegge
2008-03-31 07:47:08 +00:00
bin Reset the internal state used for the 'getopts' built-in when 'shift' or 'set' 2008-03-22 14:06:01 +00:00
cddl Remove options MK_LIBKSE and DEFAULT_THREAD_LIB now that we no longer 2008-03-29 17:44:40 +00:00
contrib Make ALTQ cope with disappearing interfaces (particularly common with mpd 2008-03-29 00:24:36 +00:00
crypto Fix the Xlist so it actually works with 'tar -X', and update the upgrade 2008-02-06 23:14:24 +00:00
etc Add support for hardwiring ppp sessions to particular devices with new 2008-03-28 07:57:52 +00:00
games Fix typo. 2008-03-03 10:06:52 +00:00
gnu Change kgdb_parse() to use wrapped versions of parse_expression() and 2008-03-29 17:46:03 +00:00
include Implement csqrtl(). 2008-03-30 20:07:15 +00:00
kerberos5 While checking over the libraries for 7.0-REL Kris found the following 2007-11-20 04:20:32 +00:00
lib Include an extra byte for the trailing NUL. <sigh> 2008-03-31 06:24:39 +00:00
libexec Fix some "in in" typos in comments. 2008-03-26 07:32:08 +00:00
release MFCs noted: BTX real mode, TCP options processing fix, hptrr 1.2. 2008-03-31 05:06:00 +00:00
rescue Adding glabel alias killed gpart alias; fix it. 2008-03-29 13:15:33 +00:00
sbin Add a new function is_default_interface() which determines if this 2008-03-30 02:42:39 +00:00
secure For users of FreeBSD <= 6.2 we recommend during the x.org 7.x upgrade 2008-03-05 20:58:15 +00:00
share Regen. 2008-03-29 17:47:12 +00:00
sys - Don't free snapdata structures when they are no longer in use. 2008-03-31 07:47:08 +00:00
tools Test remainderl() and remquol() as well. 2008-03-30 20:48:33 +00:00
usr.bin Remove options MK_LIBKSE and DEFAULT_THREAD_LIB now that we no longer 2008-03-29 17:44:40 +00:00
usr.sbin Improve style a little and remove one always-true condition. 2008-03-30 16:49:19 +00:00
COPYRIGHT Happy new year 2008! 2007-12-31 22:09:19 +00:00
LOCKS Once the release goes out, RELENG_7_* will need approval from so@. 2008-01-24 22:07:03 +00:00
MAINTAINERS OLDCARD is gone, release imp's lock. 2008-01-26 21:58:52 +00:00
Makefile Add code that should catch the most common case when date/time is 2008-03-25 15:47:22 +00:00
Makefile.inc1 Remove options MK_LIBKSE and DEFAULT_THREAD_LIB now that we no longer 2008-03-29 17:44:40 +00:00
ObsoleteFiles.inc Remove options MK_LIBKSE and DEFAULT_THREAD_LIB now that we no longer 2008-03-29 17:44:40 +00:00
README Simply running ``make world'' will bomb unless you dig up the 2006-06-07 03:33:48 +00:00
UPDATING - Add an UPDATING entry about the removal of KSE. 2008-03-12 09:48:42 +00:00

This is the top level of the FreeBSD source directory.  This file
was last revised on:
$FreeBSD$

For copyright information, please see the file COPYRIGHT in this
directory (additional copyright information also exists for some
sources in this tree - please see the specific source directories for
more information).

The Makefile in this directory supports a number of targets for
building components (or all) of the FreeBSD source tree, the most
commonly used one being ``world'', which rebuilds and installs
everything in the FreeBSD system from the source tree except the
kernel, the kernel-modules and the contents of /etc.  The ``world''
target should only be used in cases where the source tree has not
changed from the currently running version.  See:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html
for more information, including setting make(1) variables.

The ``buildkernel'' and ``installkernel'' targets build and install
the kernel and the modules (see below).  Please see the top of
the Makefile in this directory for more information on the
standard build targets and compile-time flags.

Building a kernel is a somewhat more involved process, documentation
for which can be found at:
   http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html
And in the config(8) man page.
Note: If you want to build and install the kernel with the
``buildkernel'' and ``installkernel'' targets, you might need to build
world before.  More information is available in the handbook.

The sample kernel configuration files reside in the sys/<arch>/conf
sub-directory (assuming that you've installed the kernel sources), the
file named GENERIC being the one used to build your initial installation
kernel.  The file NOTES contains entries and documentation for all possible
devices, not just those commonly used.  It is the successor of the ancient
LINT file, but in contrast to LINT, it is not buildable as a kernel but a
pure reference and documentation file.


Source Roadmap:
---------------
bin		System/user commands.

contrib		Packages contributed by 3rd parties.

crypto		Cryptography stuff (see crypto/README).

etc		Template files for /etc.

games		Amusements.

gnu		Various commands and libraries under the GNU Public License.
		Please see gnu/COPYING* for more information.

include		System include files.

kerberos5	Kerberos5 (Heimdal) package.

lib		System libraries.

libexec		System daemons.

release		Release building Makefile & associated tools.

rescue		Build system for statically linked /rescue utilities.

sbin		System commands.

secure		Cryptographic libraries and commands.

share		Shared resources.

sys		Kernel sources.

tools		Utilities for regression testing and miscellaneous tasks.

usr.bin		User commands.

usr.sbin	System administration commands.


For information on synchronizing your source tree with one or more of
the FreeBSD Project's development branches, please see:

  http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html