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android_kernel_asus_sm8350/net/core
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Eric Dumazet d6bfcc8d95 netns: add schedule point in ops_exit_list() 
commit 2836615aa22de55b8fca5e32fe1b27a67cda625e upstream.

When under stress, cleanup_net() can have to dismantle
netns in big numbers. ops_exit_list() currently calls
many helpers [1] that have no schedule point, and we can
end up with soft lockups, particularly on hosts
with many cpus.

Even for moderate amount of netns processed by cleanup_net()
this patch avoids latency spikes.

[1] Some of these helpers like fib_sync_up() and fib_sync_down_dev()
are very slow because net/ipv4/fib_semantics.c uses host-wide hash tables,
and ifindex is used as the only input of two hash functions.
    ifindexes tend to be the same for all netns (lo.ifindex==1 per instance)
    This will be fixed in a separate patch.

Fixes: 72ad937abd ("net: Add support for batching network namespace cleanups")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-01-27 09:19:54 +01:00
..
bpf_sk_storage.c bpf: Improve bucket_log calculation logic 2020-02-14 16:34:10 -05:00
datagram.c udp: fix skb_copy_and_csum_datagram with odd segment sizes 2021-02-17 10:35:19 +01:00
datagram.h net/core: Allow the compiler to verify declaration and definition consistency 2019-03-27 13:49:44 -07:00
dev_addr_lists.c net: remove unnecessary variables and callback 2019-10-24 14:53:49 -07:00
dev_ioctl.c net: fix dev_ifsioc_locked() race condition 2021-03-07 12:20:43 +01:00
dev.c net: annotate data-races on txq->xmit_lock_owner 2021-12-08 09:01:12 +01:00
devlink.c devlink: Hold rtnl lock while reading netdev attributes 2020-12-08 10:40:23 +01:00
drop_monitor.c drop_monitor: work around gcc-10 stringop-overflow warning 2020-05-20 08:20:06 +02:00
dst_cache.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
dst.c net: print proper warning on dst underflow 2019-09-26 09:05:56 +02:00
ethtool.c net: ethtool: clear heap allocations for ethtool function 2021-06-30 08:47:47 -04:00
failover.c failover: allow name change on IFF_UP slave interfaces 2019-04-10 22:12:26 -07:00
fib_notifier.c net: fib_notifier: move fib_notifier_ops from struct net into per-net struct 2019-09-07 17:28:22 +02:00
fib_rules.c ipv6: fix memory leak in fib6_rule_suppress 2021-12-08 09:01:13 +01:00
filter.c bpf: Do not WARN in bpf_warn_invalid_xdp_action() 2022-01-27 09:19:43 +01:00
flow_dissector.c flow_dissector: Fix out-of-bounds warnings 2021-09-22 12:26:29 +02:00
flow_offload.c net: core: rename indirect block ingress cb function 2019-12-18 16:08:47 +01:00
gen_estimator.c net_sched: gen_estimator: support large ewma log 2021-02-07 15:35:47 +01:00
gen_stats.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
gro_cells.c gro_cells: make sure device is up in gro_cells_receive() 2019-03-10 11:07:14 -07:00
hwbm.c net: hwbm: Make the hwbm_pool lock a mutex 2019-06-09 19:40:10 -07:00
link_watch.c net: linkwatch: fix failure to restore device state across suspend/resume 2021-08-18 08:57:00 +02:00
lwt_bpf.c lwt: Disable BH too in run_lwt_bpf() 2020-12-30 11:51:30 +01:00
lwtunnel.c lwtunnel: Validate RTA_ENCAP_TYPE attribute length 2022-01-11 15:23:32 +01:00
Makefile bpf: Introduce bpf sk local storage 2019-04-27 09:07:04 -07:00
neighbour.c net, neigh: clear whole pneigh_entry at alloc time 2021-12-14 14:49:04 +01:00
net_namespace.c netns: add schedule point in ops_exit_list() 2022-01-27 09:19:54 +01:00
net-procfs.c treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively 2019-04-09 14:19:06 +02:00
net-sysfs.c net-sysfs: update the queue counts in the unregistration path 2022-01-27 09:19:42 +01:00
net-sysfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
net-traces.c page_pool: add tracepoints for page_pool with details need by XDP 2019-06-19 11:23:13 -04:00
netclassid_cgroup.c cgroup, netclassid: remove double cond_resched 2020-05-10 10:31:32 +02:00
netevent.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
netpoll.c net: Have netpoll bring-up DSA management interface 2020-11-24 13:28:57 +01:00
netprio_cgroup.c netprio_cgroup: Fix unlimited memory leak of v2 cgroups 2020-05-20 08:20:12 +02:00
page_pool.c mm: fix struct page layout on 32-bit systems 2021-05-19 10:08:31 +02:00
pktgen.c pktgen: fix misuse of BUG_ON() in pktgen_thread_worker() 2021-03-07 12:20:44 +01:00
ptp_classifier.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295 2019-06-05 17:36:38 +02:00
request_sock.c tcp: add rcu protection around tp->fastopen_rsk 2019-10-13 10:13:08 -07:00
rtnetlink.c net: use netif_is_bridge_port() to check for IFF_BRIDGE_PORT 2021-11-02 19:46:15 +01:00
scm.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
secure_seq.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
skbuff.c net: Fix double 0x prefix print in SKB dump 2021-12-22 09:29:38 +01:00
skmsg.c bpf, sockmap: Avoid returning unneeded EAGAIN when redirecting to self 2020-11-24 13:29:19 +01:00
sock_diag.c sock: make cookie generation global instead of per netns 2019-08-09 13:14:46 -07:00
sock_map.c bpf: Fix integer overflow in argument calculation for bpf_map_area_alloc 2021-12-17 10:12:24 +01:00
sock_reuseport.c udp: Prevent reuseport_select_sock from reading uninitialized socks 2021-01-23 15:57:56 +01:00
sock.c af_unix: fix races in sk_peer_pid and sk_peer_cred accesses 2021-10-06 15:42:35 +02:00
stream.c net: stream: don't purge sk_error_queue in sk_stream_kill_queues() 2021-11-17 09:48:38 +01:00
sysctl_net_core.c bpf: Prevent increasing bpf_jit_limit above max 2021-11-17 09:48:20 +01:00
timestamping.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
tso.c net: Use skb accessors in network core 2019-07-22 20:47:56 -07:00
utils.c net: Fix skb->csum update in inet_proto_csum_replace16(). 2020-02-05 21:22:52 +00:00
xdp.c xdp: obtain the mem_id mutex before trying to remove an entry. 2019-12-18 16:09:10 +01:00