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a6d4f25888b83b8300aef28d9ee22765c1cc9b34
linux/net
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Eric Dumazet a6d4f25888 net: set net.core.rmem_max and net.core.wmem_max to 4 MB 
SO_RCVBUF and SO_SNDBUF have limited range today, unless
distros or system admins change rmem_max and wmem_max.

Even iproute2 uses 1 MB SO_RCVBUF which is capped by
the kernel.

Decouple [rw]mem_max and [rw]mem_default and increase
[rw]mem_max to 4 MB.

Before:

$ sysctl net.core.rmem_default net.core.rmem_max net.core.wmem_default net.core.wmem_max
net.core.rmem_default = 212992
net.core.rmem_max = 212992
net.core.wmem_default = 212992
net.core.wmem_max = 212992

After:

$ sysctl net.core.rmem_default net.core.rmem_max net.core.wmem_default net.core.wmem_max
net.core.rmem_default = 212992
net.core.rmem_max = 4194304
net.core.wmem_default = 212992
net.core.wmem_max = 4194304

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Neal Cardwell <ncardwell@google.com>
Link: https://patch.msgid.link/20250819174030.1986278-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-08-20 19:35:00 -07:00
..
6lowpan
net: replace ND_PRINTK with dynamic debug
2025-07-10 15:27:32 -07:00
9p
netfs: Fix the request's work item to not require a ref
2025-05-21 14:35:20 +02:00
802
treewide, timers: Rename from_timer() to timer_container_of()
2025-06-08 09:07:37 +02:00
8021q
net: s/dev_close_many/netif_close_many/
2025-07-18 17:27:47 -07:00
appletalk
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2025-07-24 11:10:46 -07:00
atm
atm: clip: Fix NULL pointer dereference in vcc_sendmsg()
2025-07-09 19:09:36 -07:00
ax25
treewide, timers: Rename from_timer() to timer_container_of()
2025-06-08 09:07:37 +02:00
batman-adv
Merge tag 'batadv-next-pullrequest-20250710' of git://git.open-mesh.org/linux-merge
2025-07-11 17:50:27 -07:00
bluetooth
Merge tag 'net-next-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2025-07-30 08:58:55 -07:00
bpf
bpf: Add attach_type field to bpf_link
2025-07-11 10:51:55 -07:00
bridge
net: bridge: remove unused argument of br_multicast_query_expired()
2025-08-15 10:26:56 -07:00
caif
caif: Replace memset(0) + strscpy() with strscpy_pad()
2025-08-12 14:08:56 -07:00
can
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2025-06-12 10:09:10 -07:00
ceph
libceph: Rename hmac_sha256() to ceph_hmac_sha256()
2025-07-04 10:18:52 -07:00
core
net: set net.core.rmem_max and net.core.wmem_max to 4 MB
2025-08-20 19:35:00 -07:00
dcb
…
devlink
devlink/port: Check attributes early and constify
2025-08-14 17:35:20 -07:00
dns_resolver
…
dsa
net: s/dev_close_many/netif_close_many/
2025-07-18 17:27:47 -07:00
ethernet
…
ethtool
net: ethtool: support including Flow Label in the flow hash for RSS
2025-08-14 11:40:13 +02:00
handshake
net/handshake: Add new parameter 'HANDSHAKE_A_ACCEPT_KEYRING'
2025-07-08 15:31:44 +02:00
hsr
treewide, timers: Rename from_timer() to timer_container_of()
2025-06-08 09:07:37 +02:00
ieee802154
treewide, timers: Rename from_timer() to timer_container_of()
2025-06-08 09:07:37 +02:00
ife
…
ipv4
net: set net.core.rmem_max and net.core.wmem_max to 4 MB
2025-08-20 19:35:00 -07:00
ipv6
net: set net.core.rmem_max and net.core.wmem_max to 4 MB
2025-08-20 19:35:00 -07:00
iucv
s390/drivers: Explicitly include <linux/export.h>
2025-06-17 18:18:02 +02:00
kcm
net: kcm: Fix race condition in kcm_unattach()
2025-08-13 18:18:33 -07:00
key
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2025-07-24 11:10:46 -07:00
l2tp
net: annotate races around sk->sk_uid
2025-06-23 17:04:03 -07:00
l3mdev
net: fib_rules: Fix iif / oif matching on L3 master device
2025-04-15 17:54:56 -07:00
lapb
treewide, timers: Rename from_timer() to timer_container_of()
2025-06-08 09:07:37 +02:00
llc
net: make sk->sk_rcvtimeo lockless
2025-06-23 17:05:12 -07:00
mac80211
wifi: mac80211: fix WARN_ON for monitor mode on some devices
2025-07-23 12:29:07 +02:00
mac802154
…
mctp
net: mctp: Fix bad kfree_skb in bind lookup test
2025-08-13 17:07:34 -07:00
mpls
net: s/dev_get_flags/netif_get_flags/
2025-07-18 17:27:47 -07:00
mptcp
mptcp: Use tcp_under_memory_pressure() in mptcp_epollin_ready().
2025-08-19 19:20:58 -07:00
ncsi
net: ncsi: Fix buffer overflow in fetching version id
2025-06-12 18:21:59 -07:00
netfilter
netfilter: nf_tables: reject duplicate device on updates
2025-08-13 08:34:55 +02:00
netlabel
calipso: unlock rcu before returning -EAFNOSUPPORT
2025-06-05 08:03:38 -07:00
netlink
netlink: avoid infinite retry looping in netlink_unicast()
2025-07-30 19:16:49 -07:00
netrom
treewide, timers: Rename from_timer() to timer_container_of()
2025-06-08 09:07:37 +02:00
nfc
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2025-06-19 13:00:24 -07:00
nsh
…
openvswitch
net: openvswitch: allow providing upcall pid for the 'execute' command
2025-07-07 14:30:39 -07:00
packet
net/packet: fix a race in packet_set_ring() and packet_notifier()
2025-08-04 17:21:27 -07:00
phonet
phonet: add __rcu annotations
2025-08-12 14:15:24 -07:00
psample
…
qrtr
…
rds
RDS: remove redundant __GFP_NOWARN
2025-08-12 14:05:44 -07:00
rfkill
…
rose
net: track pfmemalloc drops via SKB_DROP_REASON_PFMEMALLOC
2025-07-18 16:59:05 -07:00
rxrpc
rxrpc: Fix to use conn aborts for conn-wide failures
2025-07-17 07:50:48 -07:00
sched
net/sched: Use TC_RTAB_SIZE instead of magic number
2025-08-14 17:37:48 -07:00
sctp
sctp: Stop accepting md5 and sha1 for net.sctp.cookie_hmac_alg
2025-08-19 19:36:26 -07:00
shaper
…
smc
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2025-07-17 11:00:33 -07:00
strparser
net: make sk->sk_rcvtimeo lockless
2025-06-23 17:05:12 -07:00
sunrpc
Merge tag 'nfsd-6.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
2025-08-11 07:38:55 -07:00
switchdev
…
tipc
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2025-07-10 10:10:49 -07:00
tls
tls: handle data disappearing from under the TLS ULP
2025-08-12 18:59:05 -07:00
unix
Merge tag 'net-next-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2025-07-30 08:58:55 -07:00
vmw_vsock
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2025-08-14 12:13:00 -07:00
wireless
Merge tag 'wireless-next-2025-07-24' of https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next
2025-07-24 17:25:42 -07:00
x25
net/x25: Remove unused x25_terminate_link()
2025-07-14 17:19:13 -07:00
xdp
net: xsk: introduce XDP_MAX_TX_SKB_BUDGET setsockopt
2025-07-10 14:48:29 +02:00
xfrm
xfrm: Switch to skb_dstref_steal to clear dst_entry
2025-08-19 17:54:17 -07:00
compat.c
…
devres.c
…
Kconfig
net: Kconfig: add endif/endmenu comments
2025-07-22 18:17:23 -07:00
Kconfig.debug
…
Makefile
…
socket.c
net: annotate races around sk->sk_uid
2025-06-23 17:04:03 -07:00
sysctl_net.c
…