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linux/net/core
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Abel Wu 2d0c88e84e sock: Fix misuse of sk_under_memory_pressure() 
The status of global socket memory pressure is updated when:

  a) __sk_mem_raise_allocated():

	enter: sk_memory_allocated(sk) >  sysctl_mem[1]
	leave: sk_memory_allocated(sk) <= sysctl_mem[0]

  b) __sk_mem_reduce_allocated():

	leave: sk_under_memory_pressure(sk) &&
		sk_memory_allocated(sk) < sysctl_mem[0]

So the conditions of leaving global pressure are inconstant, which
may lead to the situation that one pressured net-memcg prevents the
global pressure from being cleared when there is indeed no global
pressure, thus the global constrains are still in effect unexpectedly
on the other sockets.

This patch fixes this by ignoring the net-memcg's pressure when
deciding whether should leave global memory pressure.

Fixes: e1aab161e0 ("socket: initial cgroup code.")
Signed-off-by: Abel Wu <wuyun.abel@bytedance.com>
Acked-by: Shakeel Butt <shakeelb@google.com>
Link: https://lore.kernel.org/r/20230816091226.1542-1-wuyun.abel@bytedance.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-08-17 11:34:36 -07:00
..
bpf_sk_storage.c bpf: Add length check for SK_DIAG_BPF_STORAGE_REQ_MAP_FD parsing 2023-07-27 10:07:56 -07:00
datagram.c net: datagram: fix data-races in datagram_poll() 2023-05-10 19:06:49 -07:00
dev.c net: fix net device address assign type 2023-06-22 19:55:12 -07:00
dev.h net-sysctl: factor-out rpm mask manipulation helpers 2023-02-09 17:45:55 -08:00
dev_addr_lists.c
dev_addr_lists_test.c kunit: Use KUNIT_EXPECT_MEMEQ macro 2022-10-27 02:40:14 -06:00
dev_ioctl.c net: dsa: replace NETDEV_PRE_CHANGE_HWTSTAMP notifier with a stub 2023-04-09 15:35:49 +01:00
drop_monitor.c net: extend drop reasons for multiple subsystems 2023-04-20 20:20:49 -07:00
dst.c net: dst: fix missing initialization of rt_uncached 2023-04-21 20:26:56 -07:00
dst_cache.c
failover.c net: failover: use IFF_NO_ADDRCONF flag to prevent ipv6 addrconf 2022-12-12 15:18:25 -08:00
fib_notifier.c
fib_rules.c
filter.c net: core: remove unnecessary frame_sz check in bpf_xdp_adjust_tail() 2023-08-07 19:14:41 -07:00
flow_dissector.c net: flow_dissector: add support for cfm packets 2023-06-12 17:01:45 -07:00
flow_offload.c net: flow_offload: add support for ARP frame matching 2022-11-14 11:24:16 +00:00
gen_estimator.c treewide: Convert del_timer*() to timer_shutdown*() 2022-12-25 13:38:09 -08:00
gen_stats.c net: Remove the obsolte u64_stats_fetch_*_irq() users (net). 2022-10-28 20:13:54 -07:00
gro.c gro: move the tc_ext comparison to a helper 2023-06-18 18:08:35 +01:00
gro_cells.c
gso.c net: move gso declarations and functions to their own files 2023-06-10 00:11:41 -07:00
hwbm.c
link_watch.c net: linkwatch: only report IF_OPER_LOWERLAYERDOWN if iflink is actually down 2022-11-16 09:45:00 +00:00
lwt_bpf.c
lwtunnel.c
Makefile net: move gso declarations and functions to their own files 2023-06-10 00:11:41 -07:00
neighbour.c neighbour: switch to standard rcu, instead of rcu_bh 2023-03-21 21:32:18 -07:00
net-procfs.c net-sysfs: display two backlog queue len separately 2023-03-22 12:03:52 +01:00
net-sysfs.c net: make default_rps_mask a per netns attribute 2023-02-20 11:22:54 +00:00
net-sysfs.h
net-traces.c udp6: add a missing call into udp_fail_queue_rcv_skb tracepoint 2023-07-07 09:16:52 +01:00
net_namespace.c lib/ref_tracker: improve printing stats 2023-06-05 15:28:42 -07:00
netclassid_cgroup.c
netdev-genl-gen.c net: ynl: prefix uAPI header include with uapi/ 2023-05-26 10:30:14 +01:00
netdev-genl-gen.h net: ynl: prefix uAPI header include with uapi/ 2023-05-26 10:30:14 +01:00
netdev-genl.c netdev-genl: create a simple family for netdev stuff 2023-02-02 20:48:23 -08:00
netevent.c
netpoll.c netpoll: allocate netdev tracker right away 2023-06-15 08:21:11 +01:00
netprio_cgroup.c
of_net.c of: net: export of_get_mac_address_nvmem() 2022-11-29 10:45:53 +01:00
page_pool.c page_pool: fix inconsistency for page_pool_ring_[un]lock() 2023-05-23 20:25:13 -07:00
pktgen.c net: introduce and use skb_frag_fill_page_desc() 2023-05-13 19:47:56 +01:00
ptp_classifier.c
request_sock.c
rtnetlink.c rtnetlink: let rtnl_bridge_setlink checks IFLA_BRIDGE_MODE length 2023-07-27 17:14:01 -07:00
scm.c net: Ensure ->msg_control_user is used for user buffers 2023-04-14 11:09:27 +01:00
secure_seq.c
selftests.c
skbuff.c net: prevent skb corruption on frag list segmentation 2023-07-08 10:03:26 +01:00
skmsg.c bpf, sockmap: Fix bug that strp_done cannot be called 2023-08-09 20:29:02 -07:00
sock.c sock: Fix misuse of sk_under_memory_pressure() 2023-08-17 11:34:36 -07:00
sock_destructor.h
sock_diag.c net: fix __sock_gen_cookie() 2022-11-21 20:36:30 -08:00
sock_map.c bpf, sockmap: Fix map type error in sock_map_del_link 2023-08-09 20:29:02 -07:00
sock_reuseport.c
stream.c net: deal with most data-races in sk_wait_event() 2023-05-10 10:03:32 +01:00
sysctl_net_core.c net/sysctl: Rename kvfree_rcu() to kvfree_rcu_mightsleep() 2023-04-05 13:48:04 +00:00
timestamping.c
tso.c net: tso: inline tso_count_descs() 2022-12-12 15:04:39 -08:00
utils.c net: core: inet[46]_pton strlen len types 2022-11-01 21:14:39 -07:00
xdp.c xdp: use trusted arguments in XDP hints kfuncs 2023-07-11 20:04:50 -07:00