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
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acpi
asm-generic	hyperv-fixes for v6.6-rc6	2023-10-10 11:01:21 -07:00
clocksource
crypto
drm	drm/tests: helpers: Avoid a driver uaf	2023-09-14 13:57:58 +02:00
dt-bindings
keys
kunit
kvm
linux	posix-clock: introduce posix_clock_context concept	2023-10-15 20:07:52 +01:00
math-emu
media
memory
misc
net	tcp: Set pingpong threshold via sysctl	2023-10-16 14:55:32 -07:00
pcmcia
ras
rdma
rv
scsi	ATA fixes for 6.6-rc4	2023-09-29 13:38:34 -07:00
soc
sound	ASoC: core: Do not call link_exit() on uninitialized rtd objects	2023-09-29 14:17:49 +02:00
target
trace	net: implement lockless SO_MAX_PACING_RATE	2023-10-01 19:09:54 +01:00
uapi	ptp: support event queue reader channel masks	2023-10-15 20:07:52 +01:00
ufs
vdso
video
xen	arm/xen: remove lazy mode related definitions	2023-09-19 07:04:49 +02:00