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mirror-linux/net/core
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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
..
Makefile net: get rid of net/core/request_sock.c 2026-02-05 09:23:05 -08:00
bpf_sk_storage.c Convert 'alloc_flex' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
datagram.c net: datagram: introduce datagram_poll_queue for custom receive queues 2025-10-23 15:46:04 +02:00
dev.c net: fix reference tracker mismanagement in netdev_put_lock() 2026-04-12 09:08:43 -07:00
dev.h net: fix reference tracker mismanagement in netdev_put_lock() 2026-04-12 09:08:43 -07:00
dev_addr_lists.c net: s/dev_pre_changeaddr_notify/netif_pre_changeaddr_notify/ 2025-07-18 17:27:47 -07:00
dev_addr_lists_test.c
…
dev_api.c net: define an enum for the napi threaded state 2025-07-24 18:34:55 -07:00
dev_ioctl.c net: remove legacy way to get/set HW timestamp config 2026-01-20 18:21:27 -08:00
devmem.c net: Slightly simplify net_mp_{open,close}_rxq 2026-04-09 18:21:46 -07:00
devmem.h net: inline net_is_devmem_iov() 2026-01-25 13:18:53 -08:00
drop_monitor.c Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
dst.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
dst_cache.c net: dst: annotate data-races around dst->obsolete 2025-07-02 14:32:29 -07:00
failover.c net: core: failover: enforce mandatory ops and clean up redundant checks 2026-03-03 17:44:11 -08:00
fib_notifier.c net: Add SPDX ids to some source files 2026-03-09 18:32:45 -07:00
fib_rules.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-04-17 12:26:50 -07:00
filter.c net: change sk_filter_trim_cap() to return a drop_reason by value 2026-04-12 14:30:25 -07:00
flow_dissector.c net: remove '__' from __skb_flow_get_ports() 2025-02-24 14:27:53 -08:00
flow_offload.c Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
gen_estimator.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
gen_stats.c
…
gro.c net/ipv6: Drop HBH for BIG TCP on RX side 2026-02-06 20:50:12 -08:00
gro_cells.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
gso.c
…
hotdata.c net: remove EXPORT_IPV6_MOD() and EXPORT_IPV6_MOD_GPL() macros 2026-03-29 11:21:22 -07:00
hwbm.c
…
ieee8021q_helpers.c net: ieee8021q: fix insufficient table-size assertion 2025-07-01 12:55:49 +02:00
link_watch.c net/sched: do not reset queues in graft operations 2026-03-09 18:55:55 -07:00
lock_debug.c netdev: fix the locking for netdev notifications 2025-04-17 18:55:14 -07:00
lwt_bpf.c bpf: remove ipv6_bpf_stub completely and use direct function calls 2026-03-29 11:21:24 -07:00
lwtunnel.c inet: Remove rtnl_is_held arg of lwtunnel_valid_encap_type(_attr)?(). 2025-05-20 19:18:24 -07:00
mp_dmabuf_devmem.h
…
neighbour.c net: remove EXPORT_IPV6_MOD() and EXPORT_IPV6_MOD_GPL() macros 2026-03-29 11:21:22 -07:00
net-procfs.c net: add proper RCU protection to /proc/net/ptype 2026-02-03 19:20:30 -08:00
net-sysfs.c net-sysfs: switch xps_queue_show() to sysfs_emit() 2026-03-24 11:08:17 +01:00
net-sysfs.h net: add skb_defer_disable_key static key 2026-03-12 19:25:33 -07:00
net-traces.c
…
net_namespace.c net: use get_random_u{16,32,64}() where appropriate 2026-04-09 19:27:43 -07:00
net_test.c
…
netclassid_cgroup.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
netdev-genl-gen.c net: Add queue-create operation 2026-04-09 18:21:45 -07:00
netdev-genl-gen.h net: Add queue-create operation 2026-04-09 18:21:45 -07:00
netdev-genl.c net: remove the netif_get_rx_queue_lease_locked() helpers 2026-04-09 18:26:28 -07:00
netdev_config.c net: add queue config validation callback 2026-01-23 11:49:02 -08:00
netdev_queues.c net: remove the netif_get_rx_queue_lease_locked() helpers 2026-04-09 18:26:28 -07:00
netdev_rx_queue.c net: Rename ifq_idx to rxq_idx in netif_mp_* helpers 2026-04-12 09:12:07 -07:00
netevent.c
…
netmem_priv.h netmem: replace __netmem_clear_lsb() with netmem_to_nmdesc() 2025-10-14 13:37:26 +02:00
netpoll.c net: Provide a PREEMPT_RT specific check for netdev_queue::_xmit_lock 2026-03-05 12:14:21 +01:00
netprio_cgroup.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
of_net.c
…
page_pool.c net: page_pool: sanitise allocation order 2025-12-02 11:08:39 -08:00
page_pool_priv.h net: page_pool: don't try to stash the napi id 2025-01-27 14:37:41 -08:00
page_pool_user.c page_pool: store detach_time as ktime_t to avoid false-negatives 2026-03-10 19:03:34 -07:00
pktgen.c kernel.h: drop hex.h and update all hex.h users 2026-01-20 19:44:19 -08:00
ptp_classifier.c
…
rtnetlink.c rtnetlink: add missing netlink_ns_capable() check for peer netns 2026-04-03 15:07:18 -07:00
scm.c net: use ktime_t in struct scm_timestamping_internal 2026-03-04 17:53:34 -08:00
secure_seq.c tcp: secure_seq: add back ports to TS offset 2026-03-04 17:44:35 -08:00
selftests.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
skb_fault_injection.c net: Implement fault injection forcing skb reallocation 2024-11-12 12:05:33 +01:00
skbuff.c net: add noinline __init __no_profile to skb_extensions_init() for GCOV compatibility 2026-04-12 15:29:02 -07:00
skmsg.c bpf: sockmap: Fix use-after-free of sk->sk_socket in sk_psock_verdict_data_ready(). 2026-04-01 18:54:04 -07:00
sock.c tcp: update window_clamp when SO_RCVBUF is set 2026-04-13 15:32:35 +02:00
sock_destructor.h
…
sock_diag.c net: Add SPDX ids to some source files 2026-03-09 18:32:45 -07:00
sock_map.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
sock_reuseport.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
stream.c net: stream: add description for sk_stream_write_space() 2025-07-18 16:57:21 -07:00
sysctl_net_core.c net: add skb_defer_disable_key static key 2026-03-12 19:25:33 -07:00
timestamping.c net: Add the possibility to support a selected hwtstamp in netdevice 2024-12-16 12:51:40 +00:00
tso.c net: tso: Introduce tso_dma_map and helpers 2026-04-12 10:54:31 -07:00
utils.c kernel.h: drop hex.h and update all hex.h users 2026-01-20 19:44:19 -08:00
xdp.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00