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Randall Stewart aeda852782 tcp: Rack at times can miscalculate the RTT from what it thinks is a persists probe respone. 
Turns out that if a peer sends in a window update right after rack fires off
a persists probe, we can mis-interpret the window update and calculate
a bogus RTT (very short). We still process the window update and send
the data but we incorrectly generate an RTT. We should be only doing
the RTT stuff if the rwnd is still small and has not changed.

Reviewed by: Michael Tuexen
Sponsored by: Netflix Inc.
Differential Revision: https://reviews.freebsd.org/D32717
2021-10-29 03:17:43 -04:00
.cirrus-ci Cirrus-CI: add some timing info on pkg install failure 2021-08-04 15:02:00 -04:00
.github [skip ci] fix syntax in CODEOWNERS 2021-07-22 10:58:54 -06:00
bin sh: Fix heredoc at certain places in case and for 2021-10-27 21:05:19 +02:00
cddl zfs: merge openzfs/zfs@ec64fdb93 (master) into main 2021-10-21 15:06:06 +02:00
contrib strip/objcopy: handle empty file as unknown 2021-10-25 17:28:41 -04:00
crypto OpenSSH: cherry-pick "need initgroups() before setresgid()" 2021-10-08 21:29:25 -04:00
etc sh(1): make it the default shell for the root user 2021-10-20 09:34:05 +02:00
gnu libdialog: Bump shared library version to 10. 2021-10-27 09:30:24 -07:00
include Remove FreeBSD's local copy of the dmu_buf_hold_array() function 2021-10-13 11:01:01 -07:00
kerberos5 pkgbase: Create a FreeBSD-kerberos package 2021-09-07 10:23:14 +02:00
lib sinpi,cospi,tanpi: float.h needed for week reference 2021-10-29 03:15:19 +03:00
libexec rtld: Print currently configured search path for libraries for -v 2021-10-25 20:41:53 +03:00
release release: add _LOCATION to the list of required AZURE variables 2021-10-13 17:11:48 -04:00
rescue Retire synchronous PPP kernel driver sppp(4). 2021-10-22 11:41:36 -07:00
sbin Allow GEOM utilities to specify a -v option. 2021-10-28 22:50:50 -07:00
secure libssh: Rearrange Makefile SRCS to match upstream Makefile.in 2021-10-19 20:10:56 -04:00
share Force WITHOUT_OPENSSL_KTLS off when WITHOUT_OPENSSL 2021-10-28 19:04:14 -04:00
stand lualoader: fix the autoboot_delay countdown message 2021-10-26 11:24:29 -05:00
sys tcp: Rack at times can miscalculate the RTT from what it thinks is a persists probe respone. 2021-10-29 03:17:43 -04:00
targets Retire obsolete iscsi_initiator(4) 2021-10-26 16:17:35 -04:00
tests netpfil tests: dummynet+NAT test for pf 2021-10-28 10:41:17 +02:00
tools libdialog: Bump shared library version to 10. 2021-10-27 09:30:24 -07:00
usr.bin ident: replace sbuf(9) with open_memstream(3) 2021-10-28 15:51:23 +02:00
usr.sbin wpa: Fix WITHOUT_CRYPT build 2021-10-28 19:38:12 -07:00
.arcconfig Remove history.immutable from .arcconfig 2021-04-13 12:36:25 +01:00
.arclint arc lint: ignore /tests/ in chmod 2017-12-19 03:38:06 +00:00
.cirrus.yml Cirrus-CI: add a manually triggered arm64 task 2021-09-14 15:12:55 -04:00
.clang-format clang-format: Add bitset loop macros 2021-09-21 12:08:01 -04:00
.gitattributes Add a basic clang-format configuration file 2019-06-07 15:23:52 +00:00
.gitignore gitignore: Add .clangd and .ccls-cache 2021-06-04 16:56:08 +08:00
COPYRIGHT copyrights: Happy New Year 2021 2020-12-31 10:29:44 -05:00
LOCKS LOCKS: update current locks 2018-06-09 03:08:04 +00:00
MAINTAINERS [skip ci] volunteer to maintain POSIX AIO 2021-05-30 17:21:12 -06:00
Makefile Revert "Fix native-xtools build" 2021-08-03 10:00:28 -07:00
Makefile.inc1 Makefile.inc1: Remove mentions of removed target "update" 2021-10-24 21:07:45 +02:00
Makefile.libcompat ncurses: fix libcompat (lib32 for example) building 2021-10-04 14:16:32 +02:00
Makefile.sys.inc AUTO_OBJ: For all top-level targets enforce using an OBJDIR. 2017-12-05 21:29:47 +00:00
ObsoleteFiles.inc libdialog: Bump shared library version to 10. 2021-10-27 09:30:24 -07:00
README.md Whitespace cleanup 2021-03-12 19:57:58 +08:00
RELNOTES RELNOTES: Fix KMSAN entry 2021-10-22 15:16:54 +08:00
UPDATING Retire synchronous PPP kernel driver sppp(4). 2021-10-22 11:41:36 -07:00

README.md

FreeBSD Source:

This is the top level of the FreeBSD source directory.

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), FreeBSD handbook on building userland, and Handbook for kernels for more information, including setting make(1) variables.

Source Roadmap:

Directory Description
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 and gnu/COPYING.LIB 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 FreeBSD Handbook.