Haiyang Zhang 562b1fdf06 tcp: Set pingpong threshold via sysctl ... TCP pingpong threshold is 1 by default. But some applications, like SQL DB may prefer a higher pingpong threshold to activate delayed acks in quick ack mode for better performance. The pingpong threshold and related code were changed to 3 in the year 2019 in: commit 4a41f453be ("tcp: change pingpong threshold to 3") And reverted to 1 in the year 2022 in: commit 4d8f24eeed ("Revert "tcp: change pingpong threshold to 3"") There is no single value that fits all applications. Add net.ipv4.tcp_pingpong_thresh sysctl tunable, so it can be tuned for optimal performance based on the application needs. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: Simon Horman <horms@kernel.org> Reviewed-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com> Link: https://lore.kernel.org/r/1697056244-21888-1-git-send-email-haiyangz@microsoft.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2023-10-16 14:55:32 -07:00
..
ABI	- Core Frameworks	2023-09-04 13:52:58 -07:00
accel
accounting	docs: psi: use correct config name	2023-07-31 09:54:17 -06:00
admin-guide	mm, memcg: reconsider kmem.limit_in_bytes deprecation	2023-09-29 17:20:47 -07:00
arch	arm64 fixes for -rc5	2023-10-06 07:46:25 -07:00
block	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
bpf	docs/bpf: update out-of-date doc in BPF flow dissector	2023-09-13 14:22:57 -07:00
cdrom
core-api	printk changes for 6.6	2023-09-04 13:20:19 -07:00
cpu-freq
crypto
dev-tools	LoongArch changes for v6.6	2023-09-08 12:16:52 -07:00
devicetree	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2023-10-12 17:07:34 -07:00
doc-guide
driver-api	dpll: docs: add support for pin signal phase offset/adjust	2023-10-15 16:08:24 +01:00
fault-injection	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
fb	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
features	LoongArch changes for v6.6	2023-09-08 12:16:52 -07:00
filesystems	Changes since last update:	2023-10-05 20:47:47 -07:00
firmware_class
firmware-guide	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
fpga
gpu	drm ci for 6.6-rc1	2023-09-10 11:55:26 -07:00
hid	HID: Add introduction about HID for non-kernel programmers	2023-08-07 13:24:36 +02:00
hwmon	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
i2c	media updates for v6.6-rc1	2023-09-01 12:21:32 -07:00
iio
images
infiniband
input	input: docs: pxrc: remove reference to phoenix-sim	2023-08-28 12:43:32 -06:00
isdn
kbuild	Documentation: kbuild: explain handling optional dependencies	2023-09-25 16:01:05 +09:00
kernel-hacking
leds
litmus-tests
livepatch	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
locking	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
maintainer	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
mhi
misc-devices
mm	Add x86 shadow stack support	2023-08-31 12:20:12 -07:00
netlabel
netlink	dpll: spec: add support for pin-dpll signal phase offset/adjust	2023-10-15 16:08:24 +01:00
networking	tcp: Set pingpong threshold via sysctl	2023-10-16 14:55:32 -07:00
nvdimm
nvme
PCI	Merge branch 'pci/misc'	2023-08-29 11:03:57 -05:00
pcmcia
peci
power	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
powerpc	powerpc updates for 6.6	2023-08-31 12:43:10 -07:00
process	docs: try to encourage (netdev?) reviewers	2023-10-15 14:26:51 +01:00
RCU
riscv	Merge patch series "RISC-V: Probe for misaligned access speed"	2023-09-08 11:24:12 -07:00
rust	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
scheduler	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
scsi	SCSI misc on 20230902	2023-09-02 12:02:41 -07:00
security	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
sound	ALSA: docs: Fix a typo of midi2_ump_probe option for snd-usb-audio	2023-09-12 10:00:46 +02:00
sphinx	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
sphinx-static
spi	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
staging
target
timers
tools	rtla: fix a example in rtla-timerlat-hist.rst	2023-09-22 14:44:04 +02:00
trace	Probes updates for v6.6:	2023-09-02 11:10:50 -07:00
translations	docs/zh_CN/LoongArch: Update the links of ABI	2023-09-20 14:26:38 +08:00
usb	USB / Thunderbolt / PHY driver update for 6.6-rc1	2023-09-01 09:23:34 -07:00
userspace-api	Including fixes from netfilter and bpf.	2023-09-07 18:33:07 -07:00
virt	ARM:	2023-09-07 13:52:20 -07:00
w1	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
watchdog	Documentation: Fix typos	2023-08-18 11:29:03 -06:00
wmi	Documentation work keeps chugging along; stuff for 6.6 includes:	2023-08-30 20:05:42 -07:00
.gitignore
atomic_bitops.txt
atomic_t.txt
Changes
CodingStyle
conf.py
docutils.conf
dontdiff
index.rst
Kconfig
Makefile
memory-barriers.txt
SubmittingPatches
subsystem-apis.rst