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Florian Westphal 31770e34e4 tcp: Revert "tcp: remove header prediction" 
This reverts commit 45f119bf93.

Eric Dumazet says:
  We found at Google a significant regression caused by
  45f119bf93 tcp: remove header prediction

  In typical RPC  (TCP_RR), when a TCP socket receives data, we now call
  tcp_ack() while we used to not call it.

  This touches enough cache lines to cause a slowdown.

so problem does not seem to be HP removal itself but the tcp_ack()
call.  Therefore, it might be possible to remove HP after all, provided
one finds a way to elide tcp_ack for most cases.

Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-30 11:20:09 -07:00
arch ARM: dts: rk3228-evb: Fix the compiling error 2017-08-27 17:04:23 -07:00
block blk-mq-pci: add a fallback when pci_irq_get_affinity returns NULL 2017-08-18 08:08:14 -06:00
certs
crypto
Documentation neigh: increase queue_len_bytes to match wmem_default 2017-08-29 16:10:50 -07:00
drivers staging: irda: fix init level for irda core 2017-08-30 10:15:12 -07:00
firmware
fs rxrpc: Add notification of end-of-Tx phase 2017-08-29 10:55:20 +01:00
include tcp: Revert "tcp: remove header prediction" 2017-08-30 11:20:09 -07:00
init
ipc
kernel bpf: fix oops on allocation failure 2017-08-28 15:23:34 -07:00
lib Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-08-21 17:06:42 -07:00
mm Sanitize 'move_pages()' permission checks 2017-08-20 13:26:27 -07:00
net tcp: Revert "tcp: remove header prediction" 2017-08-30 11:20:09 -07:00
samples samples/bpf: xdp_monitor tool based on tracepoints 2017-08-29 10:51:29 -07:00
scripts parse-maintainers: Move matching sections from MAINTAINERS 2017-08-08 11:16:14 -07:00
security
sound ALSA: emu10k1: Fix forgotten user-copy conversion in init code 2017-08-18 10:59:02 +02:00
tools tc-testing: add test for testing ife type 2017-08-29 15:14:18 -07:00
usr
virt
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS staging: irda: update MAINTAINERS 2017-08-29 09:30:00 -07:00
Makefile Linux 4.13-rc6 2017-08-20 14:13:52 -07:00
README

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.