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Gleb Smirnoff 5dba303d01 Use bogus_page to properly reduce number of I/Os in sendfile(2). The new
sendfile_swapin() loop works this way:

- Find first invalid page in the request.
- Do vm_pager_has_page() and get count of pages, that can be taken in
  single I/O.
- Trim valid pages from the end of the request.
- Cycle through the request and substitute to bogus_page all valid
  pages that are in the middle of the request.
- After I/O launched (pager copies array of pages into buf(9), it
  is important to restore proper page pointers with help vm_page_lookup().

Count bogus pages used and report them in sendfile stats.
2016-11-17 21:02:55 +00:00
bin DIRDEPS_BUILD: Update dependencies. 2016-11-13 00:11:30 +00:00
cddl After some ZIL changes 6 years ago zil_slog_limit got partially broken 2016-11-17 21:01:27 +00:00
contrib hyperv/vss: Nuke unused variables. 2016-11-17 03:00:56 +00:00
crypto MFV r308196: 2016-11-02 06:49:25 +00:00
etc hyperv/vss: Add driver and tools for VSS 2016-11-15 02:36:12 +00:00
gnu Add full softfloat and hardfloat support for RISC-V. 2016-11-16 15:21:32 +00:00
include hyperv/vss: Add driver and tools for VSS 2016-11-15 02:36:12 +00:00
kerberos5
lib Add full softfloat and hardfloat support for RISC-V. 2016-11-16 15:21:32 +00:00
libexec Pass CPUID[1] %edx (cpu_feature), %ecx (cpu_feature2) and 2016-11-15 09:43:26 +00:00
release Pass SWAPSIZE in env(1) when invoking mk-vmimage.sh for the 2016-11-17 20:34:08 +00:00
rescue DIRDEPS_BUILD: Update dependencies. 2016-11-13 00:11:30 +00:00
sbin Zero etherswitch_vlangroup structure before doing partial assignments. 2016-11-17 19:02:25 +00:00
secure Prefer ACFLAGS over CFLAGS for compiling aarch64 assembly files. 2016-10-26 20:12:30 +00:00
share Add full softfloat and hardfloat support for RISC-V. 2016-11-16 15:21:32 +00:00
sys Use bogus_page to properly reduce number of I/Os in sendfile(2). The new 2016-11-17 21:02:55 +00:00
targets DIRDEPS_BUILD: Connect new dependencies. 2016-11-13 00:11:23 +00:00
tests Add test case for >65535 segment coredumps 2016-11-01 19:18:16 +00:00
tools Allow installworld to be skipped as well as installkernel with -W. 2016-11-16 17:11:05 +00:00
usr.bin Use bogus_page to properly reduce number of I/Os in sendfile(2). The new 2016-11-17 21:02:55 +00:00
usr.sbin crunchide: report explicit error for combined string table 2016-11-17 18:12:17 +00:00
.arcconfig callsign isn't required anymore 2016-09-29 06:19:45 +00:00
.arclint
COPYRIGHT
LOCKS
MAINTAINERS
Makefile Add full softfloat and hardfloat support for RISC-V. 2016-11-16 15:21:32 +00:00
Makefile.inc1 Add full softfloat and hardfloat support for RISC-V. 2016-11-16 15:21:32 +00:00
Makefile.libcompat Fix in-tree GCC builds after r304681. 2016-08-23 19:29:37 +00:00
ObsoleteFiles.inc Fix dates + add an UPDATING entry. 2016-10-17 21:35:13 +00:00
README
UPDATING Fix grammar nit 2016-11-17 00:21:55 +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.

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