Eric Dumazet
131287ff83
once: add DO_ONCE_SLOW() for sleepable contexts ...
[ Upstream commit 62c07983bef9d3e78e71189441e1a470f0d1e653 ]
Christophe Leroy reported a ~80ms latency spike
happening at first TCP connect() time.
This is because __inet_hash_connect() uses get_random_once()
to populate a perturbation table which became quite big
after commit 4c2c8f03a5ab ("tcp: increase source port perturb table to 2^16")
get_random_once() uses DO_ONCE(), which block hard irqs for the duration
of the operation.
This patch adds DO_ONCE_SLOW() which uses a mutex instead of a spinlock
for operations where we prefer to stay in process context.
Then __inet_hash_connect() can use get_random_slow_once()
to populate its perturbation table.
Fixes: 4c2c8f03a5ab ("tcp: increase source port perturb table to 2^16")
Fixes: 190cc82489f4 ("tcp: change source port randomizarion at connect() time")
Reported-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/netdev/CANn89iLAEYBaoYajy0Y9UmGFff5GPxDUoG-ErVB2jDdRNQ5Tug@mail.gmail.com/T/#t
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willy Tarreau <w@1wt.eu>
Tested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-10-26 13:22:27 +02:00
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batman-adv: Don't skb_split skbuffs with frag_list
2022-05-18 09:47:24 +02:00
Bluetooth: L2CAP: Fix build errors in some archs
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bpf: Don't redirect packets with invalid pkt_len
2022-09-05 10:27:46 +02:00
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2022-09-28 11:04:07 +02:00
can: j1939: j1939_session_destroy(): fix memory leak of skbs
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2022-03-08 19:07:51 +01:00
dccp: put dccp_qpolicy_full() and dccp_qpolicy_push() in the same lock
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net: dsa: Add missing of_node_put() in dsa_port_parse_of
2022-03-23 09:12:07 +01:00
net/ieee802154: reject zero-sized raw_sendmsg()
2022-10-26 13:22:26 +02:00
once: add DO_ONCE_SLOW() for sleepable contexts
2022-10-26 13:22:27 +02:00
netfilter: nft_fib: Fix for rpath check with VRF devices
2022-10-26 13:22:25 +02:00
kcm: fix strp_init() order and cleanup
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af_key: Do not call xfrm_probe_algs in parallel
2022-09-05 10:27:40 +02:00
ipv6: Fix signed integer overflow in l2tp_ip6_sendmsg
2022-06-22 14:11:21 +02:00
l3mdev: l3mdev_master_upper_ifindex_by_index_rcu should be using netdev_master_upper_dev_get_rcu
2022-04-27 13:50:47 +02:00
llc: only change llc->dev when bind() succeeds
2022-03-28 08:46:48 +02:00
wifi: mac80211: allow bw change during channel switch in mesh
2022-10-26 13:22:22 +02:00
net: mac802154: Fix a condition in the receive path
2022-09-15 12:04:53 +02:00
netfilter: nfnetlink_osf: fix possible bogus match in nf_osf_find()
2022-09-28 11:04:05 +02:00
netlabel: fix out-of-bounds memory accesses
2022-04-15 14:18:35 +02:00
netlink: do not reset transport header in netlink_recvmsg()
2022-05-18 09:47:25 +02:00
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2022-06-14 18:11:33 +02:00
net: openvswitch: fix parsing of nw_proto for IPv6 fragments
2022-06-29 08:58:44 +02:00
net/af_packet: check len when min_header_len equals to 0
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2022-10-26 13:22:26 +02:00
rose: check NULL rose_loopback_neigh->loopback
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rxrpc: Fix calc of resend age
2022-09-28 11:03:58 +02:00
net: sched: fix possible refcount leak in tc_new_tfilter()
2022-09-28 11:04:07 +02:00
sctp: handle the error returned from sctp_auth_asoc_init_active_key
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net/smc: Remove redundant refcount increase
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SUNRPC: RPC level errors should set task->tk_rpc_status
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tipc: fix shift wrapping bug in map_get()
2022-09-15 12:04:55 +02:00
net/tls: Fix race in TLS device down flow
2022-07-29 17:14:12 +02:00
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2022-06-14 18:11:57 +02:00
vhost/vsock: Use kvmalloc/kvfree for larger packets.
2022-10-26 13:22:25 +02:00
wifi: cfg80211: update hidden BSSes to avoid WARN_ON
2022-10-15 07:54:41 +02:00
net/x25: Fix null-ptr-deref caused by x25_disconnect
2022-04-15 14:18:21 +02:00
xfrm: fix refcount leak in __xfrm_policy_check()
2022-09-05 10:27:39 +02:00
net: Fix a data-race around sysctl_somaxconn.
2022-09-05 10:27:42 +02:00
131287ff83