mirror-linux/include
Jakub Kicinski b025461303 tcp: update window_clamp when SO_RCVBUF is set
Commit under Fixes moved recomputing the window clamp to
tcp_measure_rcv_mss() (when scaling_ratio changes).
I suspect it missed the fact that we don't recompute the clamp
when rcvbuf is set. Until scaling_ratio changes we are
stuck with the old window clamp which may be based on
the small initial buffer. scaling_ratio may never change.

Inspired by Eric's recent commit d1361840f8 ("tcp: fix
SO_RCVLOWAT and RCVBUF autotuning") plumb the user action
thru to TCP and have it update the clamp.

A smaller fix would be to just have tcp_rcvbuf_grow()
adjust the clamp even if SOCK_RCVBUF_LOCK is set.
But IIUC this is what we were trying to get away from
in the first place.

Fixes: a2cbb16039 ("tcp: Update window clamping condition")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Eric Dumazet <edumaze@google.com>
Link: https://patch.msgid.link/20260408001438.129165-1-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-04-13 15:32:35 +02:00
..
acpi
asm-generic kbuild: Split .modinfo out from ELF_DETAILS 2026-02-26 11:50:19 -07:00
clocksource
crypto crypto: algif_aead - Revert to operating out-of-place 2026-03-31 17:11:47 +09:00
cxl
drm drm/dp: Add definition for Panel Replay full-line granularity 2026-03-04 15:26:08 +02:00
dt-bindings reset: spacemit: k3: Decouple composite reset lines 2026-03-23 12:25:47 +01:00
hyperv mshv: Fix infinite fault loop on permission-denied GPA intercepts 2026-04-04 05:25:53 +00:00
keys
kunit kunit: irq: Ensure timer doesn't fire too frequently 2026-02-24 14:44:21 -08:00
kvm
linux tcp: update window_clamp when SO_RCVBUF is set 2026-04-13 15:32:35 +02:00
math-emu
media
memory
misc
net tcp: update window_clamp when SO_RCVBUF is set 2026-04-13 15:32:35 +02:00
pcmcia
ras
rdma RDMA/core: Check id_priv->restricted_node_type in cma_listen_on_dev() 2026-02-25 07:50:10 -05:00
rv rv: Fix multiple definition of __pcpu_unique_da_mon_this 2026-02-20 13:12:00 +01:00
scsi
soc
sound ASoC: SDCA: remove the max count of initialization table 2026-03-25 12:17:43 +00:00
target
trace Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-04-09 13:20:59 -07:00
uapi net: bridge: add stp_mode attribute for STP mode selection 2026-04-10 15:52:24 -07:00
ufs
vdso
video
xen xen/xenbus: better handle backend crash 2026-03-04 15:31:40 +01:00
Kbuild