Eric Dumazet cb7cf8a33f inet: Clean up inet_csk_wait_for_connect() vs. might_sleep() ... I got the following trace with current net-next kernel : [14723.885290] WARNING: CPU: 26 PID: 22658 at kernel/sched/core.c:7285 __might_sleep+0x89/0xa0() [14723.885325] do not call blocking ops when !TASK_RUNNING; state=1 set at [<ffffffff810e8734>] prepare_to_wait_exclusive+0x34/0xa0 [14723.885355] CPU: 26 PID: 22658 Comm: netserver Not tainted 4.0.0-dbg-DEV #1379 [14723.885359] ffffffff81a223a8 ffff881fae9e7ca8 ffffffff81650b5d 0000000000000001 [14723.885364] ffff881fae9e7cf8 ffff881fae9e7ce8 ffffffff810a72e7 0000000000000000 [14723.885367] ffffffff81a57620 000000000000093a 0000000000000000 ffff881fae9e7e64 [14723.885371] Call Trace: [14723.885377] [<ffffffff81650b5d>] dump_stack+0x4c/0x65 [14723.885382] [<ffffffff810a72e7>] warn_slowpath_common+0x97/0xe0 [14723.885386] [<ffffffff810a73e6>] warn_slowpath_fmt+0x46/0x50 [14723.885390] [<ffffffff810f4c5d>] ? trace_hardirqs_on_caller+0x10d/0x1d0 [14723.885393] [<ffffffff810e8734>] ? prepare_to_wait_exclusive+0x34/0xa0 [14723.885396] [<ffffffff810e8734>] ? prepare_to_wait_exclusive+0x34/0xa0 [14723.885399] [<ffffffff810ccdc9>] __might_sleep+0x89/0xa0 [14723.885403] [<ffffffff81581846>] lock_sock_nested+0x36/0xb0 [14723.885406] [<ffffffff815829a3>] ? release_sock+0x173/0x1c0 [14723.885411] [<ffffffff815ea1f7>] inet_csk_accept+0x157/0x2a0 [14723.885415] [<ffffffff810e8900>] ? abort_exclusive_wait+0xc0/0xc0 [14723.885419] [<ffffffff8161b96d>] inet_accept+0x2d/0x150 [14723.885424] [<ffffffff8157db6f>] SYSC_accept4+0xff/0x210 [14723.885428] [<ffffffff8165a451>] ? retint_swapgs+0xe/0x44 [14723.885431] [<ffffffff810f4c5d>] ? trace_hardirqs_on_caller+0x10d/0x1d0 [14723.885437] [<ffffffff81369c0e>] ? trace_hardirqs_on_thunk+0x3a/0x3f [14723.885441] [<ffffffff8157ef40>] SyS_accept+0x10/0x20 [14723.885444] [<ffffffff81659872>] system_call_fastpath+0x12/0x17 [14723.885447] ---[ end trace ff74cd83355b1873 ]--- In commit 26cabd3125 Peter added a sched_annotate_sleep() in sk_wait_event() Is the following patch needed as well ? Alternative would be to use sk_wait_event() from inet_csk_wait_for_connect() Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2015-03-17 15:03:54 -04:00
..
netfilter
af_inet.c
ah4.c
arp.c
cipso_ipv4.c
datagram.c
devinet.c	net: spelling fixes	2015-02-14 20:36:08 -08:00
esp4.c
fib_frontend.c
fib_lookup.h
fib_rules.c
fib_semantics.c
fib_trie.c
fou.c	gue: Use checksum partial with remote checksum offload	2015-02-11 15:12:13 -08:00
geneve.c
gre_demux.c
gre_offload.c
icmp.c
igmp.c
inet_connection_sock.c	inet: Clean up inet_csk_wait_for_connect() vs. might_sleep()	2015-03-17 15:03:54 -04:00
inet_diag.c	inet_diag: fix possible overflow in inet_diag_dump_one_icsk()	2015-03-13 15:54:27 -04:00
inet_fragment.c
inet_hashtables.c
inet_lro.c
inet_timewait_sock.c
inetpeer.c
ip_forward.c	xps: must clear sender_cpu before forwarding	2015-03-11 23:51:18 -04:00
ip_fragment.c	ipv4: ip_check_defrag should not assume that skb_network_offset is zero	2015-03-05 21:43:48 -05:00
ip_gre.c
ip_input.c
ip_options.c
ip_output.c	udp: only allow UFO for packets from SOCK_DGRAM sockets	2015-03-02 22:19:29 -05:00
ip_sockglue.c	ip: fix error queue empty skb handling	2015-03-08 23:01:54 -04:00
ip_tunnel_core.c
ip_tunnel.c
ip_vti.c
ipcomp.c
ipconfig.c
ipip.c
ipmr.c
Kconfig
Makefile
netfilter.c
ping.c	net: ping: Return EAFNOSUPPORT when appropriate.	2015-03-04 15:46:51 -05:00
proc.c
protocol.c
raw.c
route.c
syncookies.c
sysctl_net_ipv4.c
tcp_bic.c
tcp_cong.c	tcp: fix tcp_cong_avoid_ai() credit accumulation bug with decreases in w	2015-03-11 16:51:51 -04:00
tcp_cubic.c	tcp: restore 1.5x per RTT limit to CUBIC cwnd growth in congestion avoidance	2015-03-11 16:51:51 -04:00
tcp_dctcp.c
tcp_diag.c
tcp_fastopen.c	tcp: make sure skb is not shared before using skb_get()	2015-02-13 07:11:40 -08:00
tcp_highspeed.c
tcp_htcp.c
tcp_hybla.c
tcp_illinois.c
tcp_input.c	tcp: fix tcp_should_expand_sndbuf() to use tcp_packets_in_flight()	2015-02-22 23:07:11 -05:00
tcp_ipv4.c
tcp_lp.c
tcp_memcontrol.c	memcg: cleanup static keys decrement	2015-02-12 18:54:10 -08:00
tcp_metrics.c
tcp_minisocks.c
tcp_offload.c
tcp_output.c
tcp_probe.c
tcp_scalable.c
tcp_timer.c
tcp_vegas.c
tcp_vegas.h
tcp_veno.c
tcp_westwood.c
tcp_yeah.c
tcp.c	tcp: align tcp_xmit_size_goal() on tcp_tso_autosize()	2015-03-05 22:31:12 -05:00
tunnel4.c
udp_diag.c
udp_impl.h
udp_offload.c	udp: Set SKB_GSO_UDP_TUNNEL* in UDP GRO path	2015-02-11 15:12:10 -08:00
udp_tunnel.c
udp.c
udplite.c
xfrm4_input.c
xfrm4_mode_beet.c
xfrm4_mode_transport.c
xfrm4_mode_tunnel.c
xfrm4_output.c
xfrm4_policy.c
xfrm4_protocol.c
xfrm4_state.c
xfrm4_tunnel.c