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Filename Latest commit message Latest commit date
Yuchung Cheng e42866031f tcp: avoid min RTT bloat by skipping RTT from delayed-ACK in BBR
A persistent connection may send tiny amount of data (e.g. health-check)
for a long period of time. BBR's windowed min RTT filter may only see
RTT samples from delayed ACKs causing BBR to grossly over-estimate
the path delay depending how much the ACK was delayed at the receiver.

This patch skips RTT samples that are likely coming from delayed ACKs. Note
that it is possible the sender never obtains a valid measure to set the
min RTT. In this case BBR will continue to set cwnd to initial window
which seems fine because the connection is thin stream.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Priyaranjan Jha <priyarjha@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-19 15:39:30 -05:00
arch Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-01-17 00:10:42 -05:00
block
certs
crypto
Documentation linux-can-next-for-4.16-20180116 2018-01-17 16:08:25 -05:00
drivers cxgb4: IPv6 filter takes 2 tids 2018-01-19 15:09:38 -05:00
firmware
fs error-injection: Add injectable error types 2018-01-12 17:33:38 -08:00
include tcp: avoid min RTT bloat by skipping RTT from delayed-ACK in BBR 2018-01-19 15:39:30 -05:00
init Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-01-12 10:23:59 -08:00
ipc
kernel Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-01-17 00:10:42 -05:00
lib error-injection: Support fault injection framework 2018-01-12 17:33:38 -08:00
mm kmemleak: allow to coexist with fault injection 2018-01-13 10:42:48 -08:00
net tcp: avoid min RTT bloat by skipping RTT from delayed-ACK in BBR 2018-01-19 15:39:30 -05:00
samples samples/bpf: Fix trailing semicolon 2018-01-17 00:23:58 +01:00
scripts Kbuild fixes for v4.15 2018-01-13 13:24:56 -08:00
security Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-01-17 00:10:42 -05:00
sound
tools Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-01-17 00:10:42 -05:00
usr
virt
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS wireless-drivers-next patches for 4.16 2018-01-19 10:26:53 -05:00
Makefile Linux 4.15-rc8 2018-01-14 15:32:30 -08:00
README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.