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freebsd with flexible iflib nic queues
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Matt Macy 9f3a171221 Enable balanced arc pruning 
Taken from:
ommit f604673836
Author: Brian Behlendorf <behlendorf1@llnl.gov>
Date:   Sat May 30 09:57:53 2015 -0500

    Make arc_prune() asynchronous

    As described in the comment above arc_adapt_thread() it is critical
    that the arc_adapt_thread() function never sleep while holding a hash
    lock.  This behavior was possible in the Linux implementation because
    the arc_prune() logic was implemented to be synchronous.  Under
    illumos the analogous dnlc_reduce_cache() function is asynchronous.

    To address this the arc_do_user_prune() function is has been reworked
    in to two new functions as follows:

    * arc_prune_async() is an asynchronous implementation which dispatches
    the prune callback to be run by the system taskq.  This makes it
    suitable to use in the context of the arc_adapt_thread().

    * arc_prune() is a synchronous implementation which depends on the
    arc_prune_async() implementation but blocks until the outstanding
    callbacks complete.  This is used in arc_kmem_reap_now() where it
    is safe, and expected, that memory will be freed.

    This patch additionally adds the zfs_arc_meta_strategy module option
    while allows the meta reclaim strategy to be configured.  It defaults
    to a balanced strategy which has been proved to work well under Linux
    but the illumos meta-only strategy can be enabled.

    Signed-off-by: Tim Chase <tim@chase2k.com>
    Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2018-08-11 22:01:52 +00:00
bin ls(1): Enable colors with COLORTERM is set in the environment 2018-08-08 21:51:19 +00:00
cddl Extend the info about the limitations of datasets in jails. 2018-08-11 20:49:19 +00:00
contrib Pull in r338481 from upstream llvm trunk (by Chandler Carruth): 2018-08-11 10:42:12 +00:00
crypto Merge upstream patch to unbreak tunnel forwarding. 2018-05-16 14:04:39 +00:00
etc Move all NTP related files to usr.sbin/ntp/ntpd. 2018-08-11 17:42:42 +00:00
gnu Update libstdc++ configuration. 2018-07-16 18:53:28 +00:00
include Bring in timespce_get form NetBSD. 2018-08-10 15:16:30 +00:00
kerberos5 Remove redundant space. 2018-07-10 00:26:13 +00:00
lib In r308100, an explicit -fexceptions flag was added for the C sources 2018-08-10 19:57:55 +00:00
libexec Remove pointless comment. 2018-08-03 10:59:05 +00:00
release Invoke the growfs rc script for each boot on GCE. 2018-08-09 23:43:10 +00:00
rescue Avoid referencing private lib names directly. 2017-11-10 07:53:02 +00:00
sbin Re-enable reading byte swapped NFS_MAGIC dumps. 2018-08-11 16:12:23 +00:00
secure Upgrade to OpenSSH 7.7p1. 2018-05-11 13:22:43 +00:00
share Add svnlite to places where svn is mentioned. 2018-08-11 13:18:19 +00:00
stand libi386: Fix typo in pxe.h 2018-08-09 03:45:47 +00:00
sys Enable balanced arc pruning 2018-08-11 22:01:52 +00:00
targets Remove special cases for armeb in the build. 2018-07-17 23:23:54 +00:00
tests pf tests: Basic test for 'set skip in $groupname' 2018-08-11 16:41:07 +00:00
tools Make distribution now happens from top of source tree. 2018-08-10 06:28:25 +00:00
usr.bin indent(1): revert r334640 and r334632 2018-08-11 19:20:06 +00:00
usr.sbin Move all NTP related files to usr.sbin/ntp/ntpd. 2018-08-11 17:42:42 +00:00
.arcconfig
.arclint arc lint: ignore /tests/ in chmod 2017-12-19 03:38:06 +00:00
.gitattributes Remove spuriously added svn properties 2018-08-02 18:37:02 +00:00
.gitignore Ignore _.universe-toolchain file. 2018-07-01 13:50:37 +00:00
COPYRIGHT Remove 'All Rights Reserved' from the collection copyright and templates. 2018-05-09 02:02:49 +00:00
LOCKS LOCKS: update current locks 2018-06-09 03:08:04 +00:00
MAINTAINERS Add pointer to freebsd-numerics for libm. 2018-07-16 15:29:32 +00:00
Makefile As discussed several times on freebsd-arch, start to decommission armeb. 2018-07-17 23:23:34 +00:00
Makefile.inc1 Makefile.inc1: Add libl to -legacy as well 2018-08-10 00:10:57 +00:00
Makefile.libcompat Install the 32-bit compat sanitizer libraries. 2018-08-03 18:52:51 +00:00
Makefile.sys.inc AUTO_OBJ: For all top-level targets enforce using an OBJDIR. 2017-12-05 21:29:47 +00:00
ObsoleteFiles.inc Add a few forgotten files to ObsoleteFiles.inc: 2018-07-25 17:14:05 +00:00
README README: add generic notes about GENERIC and NOTES 2018-06-17 19:44:24 +00:00
README.md README: add generic notes about GENERIC and NOTES 2018-06-17 19:44:24 +00:00
UPDATING Switch the default pager for most commands to less 2018-08-08 19:24:20 +00:00

README.md

FreeBSD Source:

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

FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.

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. See build(7), config(8), https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html, and https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information, including setting make(1) variables.

Source Roadmap:

bin		System/user commands.

cddl		Various commands and libraries under the Common Development
		and Distribution License.

contrib		Packages contributed by 3rd parties.

crypto		Cryptography stuff (see crypto/README).

etc		Template files for /etc.

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.

stand		Boot loader sources.

sys		Kernel sources.

sys/<arch>/conf Kernel configuration files. GENERIC is the configuration
		used in release builds. NOTES contains documentation of
		all possible entries.

tests		Regression tests which can be run by Kyua.  See tests/README
		for additional information.

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:

https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/current-stable.html