freebsd with flexible iflib nic queues
Go to file
Xin LI eb3d0c5d8c MFuser/delphij/zfs-arc-rebase@r281754:
In r256613, taskqueue_enqueue_locked() have been modified to release the
task queue lock before returning.  In r276665, taskqueue_drain_all() will
call taskqueue_enqueue_locked() to insert the barrier task into the queue,
but did not reacquire the lock after it but later code expects the lock
still being held (e.g. TQ_SLEEP()).

The barrier task is special and if we release then reacquire the lock,
there would be a small race window where a high priority task could sneak
into the queue.  Looking more closely, the race seems to be tolerable but
is undesirable from semantics standpoint.

To solve this, in taskqueue_drain_tq_queue(), instead of directly calling
taskqueue_enqueue_locked(), insert the barrier task directly without
releasing the lock.
2015-05-26 01:40:33 +00:00
bin Convert to use libxo. Document use of libxo as well. 2015-05-22 23:07:55 +00:00
cddl lockstat(1): document the -V option. 2015-05-25 01:18:46 +00:00
contrib Upgrade our copy of clang and llvm to 3.6.1 release. 2015-05-25 13:43:03 +00:00
crypto Use proper CHAN_TCP_PACKET_DEFAULT for agent forwarding when HPN disabled. 2015-04-02 18:43:25 +00:00
etc Upgrade our copy of clang and llvm to 3.6.1 release. 2015-05-25 13:43:03 +00:00
games fortune/tools/do_uniq.py 2015-04-02 22:42:23 +00:00
gnu ntp is now again libreadline free, so only build libreadline for gdb 2015-05-25 20:29:35 +00:00
include Remove clause 3 and 4 from the license 2015-05-21 08:38:25 +00:00
kerberos5 Make kerberos use the same sqlite libraries as other sqlite consumer. 2015-05-20 18:56:29 +00:00
lib Upgrade our copy of clang and llvm to 3.6.1 release. 2015-05-25 13:43:03 +00:00
libexec Remove historical GNUC test 2015-05-06 15:29:11 +00:00
release Use mkimg(1) to create the i386 memstick images, similar to 2015-05-23 00:32:58 +00:00
rescue Significant upgrades to sa(4) and mt(1). 2015-02-23 21:59:30 +00:00
sbin Bring back support for checking tables via "ipfw -n". 2015-05-19 18:29:13 +00:00
secure Add the openssl header for arm64. As it is based on MACHINE_CPUARCH it 2015-03-24 14:16:14 +00:00
share Considers cases when NO_SHARED?=[no|NO] as dynamically linking 2015-05-26 01:09:56 +00:00
sys MFuser/delphij/zfs-arc-rebase@r281754: 2015-05-26 01:40:33 +00:00
tests Only reparent a traced process to its old parent if the tracing process is 2015-05-22 11:04:54 +00:00
tools Upgrade our copy of clang and llvm to 3.6.1 release. 2015-05-25 13:43:03 +00:00
usr.bin Teach kdump to understand both linux emulation. 2015-05-24 16:22:03 +00:00
usr.sbin Fix overlinking again after recent ntp updates 2015-05-25 20:27:46 +00:00
.arcconfig Phabricator: enable "history.immutable": 2015-04-30 00:27:53 +00:00
.arclint phabricator related changes: 2015-04-20 20:33:22 +00:00
COPYRIGHT Bump copyright year. 2014-12-31 10:00:43 +00:00
LOCKS
MAINTAINERS Remove cokane@ from MAINTAINERS for 3dfx(4)/tdfx(4) because their email 2014-11-25 05:25:12 +00:00
Makefile Don't add arm64 to universe builds if the user provided a TARGETS list 2015-04-28 17:13:05 +00:00
Makefile.inc1 _Really_, _Really_ fix buildworld by moving the conditionals down, fixing some 2015-05-21 05:02:08 +00:00
ObsoleteFiles.inc Upgrade our copy of clang and llvm to 3.6.1 release. 2015-05-25 13:43:03 +00:00
README README: changes and fixups 2015-04-19 07:16:44 +00:00
UPDATING Upgrade our copy of clang and llvm to 3.6.1 release. 2015-05-25 13:43:03 +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.  See build(7)
and 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.  See build(7), config(8),
and http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html
for more information.

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 kernel configuration files reside in the sys/<arch>/conf
sub-directory.  GENERIC is the default configuration used in release builds.
NOTES contains entries and documentation for all possible
devices, not just those commonly used.


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.

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.

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:

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