Hi, I just experienced network hangup with 4.7.0, it happened shortly after resume from hibernate: [201988.443552] INFO: rcu_preempt detected stalls on CPUs/tasks: [201988.443556] Tasks blocked on level-0 rcu_node (CPUs 0-3): P14563 [201988.443557] (detected by 3, t=18002 jiffies, g=7365154, c=7365153, q=15274) [201988.443560] client_socket_t R running task 0 14563 1 0x00000000 [201988.443563] ffff8800c427a900 00000000e1b77832 ffff880217603da0 ffffffff810bf66a [201988.443565] ffffffff810bf5d1 ffff8800c427a900 ffffffff81e566c0 ffff880217603dd0 [201988.443567] ffffffff8119a3cf ffff8802177d80c0 ffffffff81e566c0 ffffffff81f89ae0 [201988.443569] Call Trace: [201988.443571] <IRQ> [<ffffffff810bf66a>] sched_show_task+0xfa/0x160 [201988.443585] [<ffffffff810bf5d1>] ? sched_show_task+0x61/0x160 [201988.443587] [<ffffffff8119a3cf>] rcu_print_detail_task_stall_rnp+0x52/0x76 [201988.443590] [<ffffffff81103176>] rcu_check_callbacks+0x866/0x9e0 [201988.443592] [<ffffffff81108e79>] update_process_times+0x39/0x60 [201988.443594] [<ffffffff8111a831>] tick_sched_handle.isra.5+0x21/0x60 [201988.443596] [<ffffffff8111a8b2>] tick_sched_timer+0x42/0x70 [201988.443598] [<ffffffff81109860>] __hrtimer_run_queues+0x140/0x3c0 [201988.443599] [<ffffffff8111a870>] ? tick_sched_handle.isra.5+0x60/0x60 [201988.443601] [<ffffffff8110a233>] hrtimer_interrupt+0xb3/0x1c0 [201988.443603] [<ffffffff8103b896>] local_apic_timer_interrupt+0x36/0x60 [201988.443606] [<ffffffff819ad06d>] smp_apic_timer_interrupt+0x3d/0x50 [201988.443607] [<ffffffff819ab53c>] apic_timer_interrupt+0x8c/0xa0 [201988.443608] <EOI> [<ffffffff8183b425>] ? __nf_conntrack_find_get+0x285/0x420 [201988.443611] [<ffffffff8183d291>] ? nf_conntrack_in+0x1d1/0x8d0 [201988.443612] [<ffffffff8183d291>] nf_conntrack_in+0x1d1/0x8d0 [201988.443615] [<ffffffff818fb835>] ipv4_conntrack_local+0x45/0x50 [201988.443616] [<ffffffff818350b2>] nf_iterate+0x62/0x80 [201988.443618] [<ffffffff81835170>] nf_hook_slow+0xa0/0x110 [201988.443620] [<ffffffff818350d5>] ? nf_hook_slow+0x5/0x110 [201988.443622] [<ffffffff818aa408>] __ip_local_out+0xd8/0x120 [201988.443624] [<ffffffff818a8240>] ? ip_forward_options+0x1f0/0x1f0 [201988.443625] [<ffffffff818aa46c>] ip_local_out+0x1c/0x70 [201988.443627] [<ffffffff818aa84f>] ip_queue_xmit+0x18f/0x450 [201988.443628] [<ffffffff818aa6c5>] ? ip_queue_xmit+0x5/0x450 [201988.443630] [<ffffffff818c307b>] tcp_transmit_skb+0x48b/0x8e0 [201988.443632] [<ffffffff818c4dd9>] tcp_connect+0x629/0x830 [201988.443634] [<ffffffff817f56ff>] ? secure_tcp_sequence_number+0x7f/0xe0 [201988.443636] [<ffffffff818c7f49>] tcp_v4_connect+0x2b9/0x460 [201988.443638] [<ffffffff818e2012>] __inet_stream_connect+0xb2/0x310 [201988.443640] [<ffffffff810b9051>] ? preempt_count_sub+0xa1/0x100 [201988.443642] [<ffffffff817e5061>] ? lock_sock_nested+0x31/0x90 [201988.443644] [<ffffffff8109583f>] ? __local_bh_enable_ip+0x6f/0xd0 [201988.443646] [<ffffffff818e22a8>] inet_stream_connect+0x38/0x50 [201988.443647] [<ffffffff817e241b>] SyS_connect+0x7b/0xf0 [201988.443649] [<ffffffff817df485>] ? sock_alloc_file+0xa5/0x140 [201988.443651] [<ffffffff8100111a>] ? trace_hardirqs_on_thunk+0x1a/0x1c [201988.443652] [<ffffffff819aa8bc>] entry_SYSCALL_64_fastpath+0x1f/0xbd [201988.443654] client_socket_t R running task 0 14563 1 0x00000000 [201988.443656] ffff8800c427a900 00000000e1b77832 ffff880217603da0 ffffffff810bf66a [201988.443658] ffffffff810bf5d1 ffff8800c427a900 ffffffff81e566c0 ffff880217603dd0 [201988.443660] ffffffff8119a3cf ffff8802177d80c0 ffffffff81e566c0 ffffffff81f89ae0 [201988.443662] Call Trace: [201988.443663] <IRQ> [<ffffffff810bf66a>] sched_show_task+0xfa/0x160 [201988.443665] [<ffffffff810bf5d1>] ? sched_show_task+0x61/0x160 [201988.443666] [<ffffffff8119a3cf>] rcu_print_detail_task_stall_rnp+0x52/0x76 [201988.443668] [<ffffffff811031af>] rcu_check_callbacks+0x89f/0x9e0 [201988.443669] [<ffffffff81108e79>] update_process_times+0x39/0x60 [201988.443671] [<ffffffff8111a831>] tick_sched_handle.isra.5+0x21/0x60 [201988.443672] [<ffffffff8111a8b2>] tick_sched_timer+0x42/0x70 [201988.443674] [<ffffffff81109860>] __hrtimer_run_queues+0x140/0x3c0 [201988.443675] [<ffffffff8111a870>] ? tick_sched_handle.isra.5+0x60/0x60 [201988.443677] [<ffffffff8110a233>] hrtimer_interrupt+0xb3/0x1c0 [201988.443679] [<ffffffff8103b896>] local_apic_timer_interrupt+0x36/0x60 [201988.443680] [<ffffffff819ad06d>] smp_apic_timer_interrupt+0x3d/0x50 [201988.443682] [<ffffffff819ab53c>] apic_timer_interrupt+0x8c/0xa0 [201988.443682] <EOI> [<ffffffff8183b425>] ? __nf_conntrack_find_get+0x285/0x420 [201988.443685] [<ffffffff8183d291>] ? nf_conntrack_in+0x1d1/0x8d0 [201988.443686] [<ffffffff8183d291>] nf_conntrack_in+0x1d1/0x8d0 [201988.443688] [<ffffffff818fb835>] ipv4_conntrack_local+0x45/0x50 [201988.443689] [<ffffffff818350b2>] nf_iterate+0x62/0x80 [201988.443691] [<ffffffff81835170>] nf_hook_slow+0xa0/0x110 [201988.443692] [<ffffffff818350d5>] ? nf_hook_slow+0x5/0x110 [201988.443694] [<ffffffff818aa408>] __ip_local_out+0xd8/0x120 [201988.443696] [<ffffffff818a8240>] ? ip_forward_options+0x1f0/0x1f0 [201988.443697] [<ffffffff818aa46c>] ip_local_out+0x1c/0x70 [201988.443699] [<ffffffff818aa84f>] ip_queue_xmit+0x18f/0x450 [201988.443700] [<ffffffff818aa6c5>] ? ip_queue_xmit+0x5/0x450 [201988.443702] [<ffffffff818c307b>] tcp_transmit_skb+0x48b/0x8e0 [201988.443703] [<ffffffff818c4dd9>] tcp_connect+0x629/0x830 [201988.443705] [<ffffffff817f56ff>] ? secure_tcp_sequence_number+0x7f/0xe0 [201988.443706] [<ffffffff818c7f49>] tcp_v4_connect+0x2b9/0x460 [201988.443708] [<ffffffff818e2012>] __inet_stream_connect+0xb2/0x310 [201988.443710] [<ffffffff810b9051>] ? preempt_count_sub+0xa1/0x100 [201988.443711] [<ffffffff817e5061>] ? lock_sock_nested+0x31/0x90 [201988.443713] [<ffffffff8109583f>] ? __local_bh_enable_ip+0x6f/0xd0 [201988.443715] [<ffffffff818e22a8>] inet_stream_connect+0x38/0x50 [201988.443716] [<ffffffff817e241b>] SyS_connect+0x7b/0xf0 [201988.443718] [<ffffffff817df485>] ? sock_alloc_file+0xa5/0x140 [201988.443719] [<ffffffff8100111a>] ? trace_hardirqs_on_thunk+0x1a/0x1c [201988.443720] [<ffffffff819aa8bc>] entry_SYSCALL_64_fastpath+0x1f/0xbd [202168.442569] INFO: rcu_preempt detected stalls on CPUs/tasks: [202168.442572] Tasks blocked on level-0 rcu_node (CPUs 0-3): P14563 [202168.442574] (detected by 3, t=72007 jiffies, g=7365154, c=7365153, q=34376) [202168.442577] client_socket_t R running task 0 14563 1 0x00000000 [202168.442579] ffff8800c427a900 00000000e1b77832 ffff880217603da0 ffffffff810bf66a [202168.442581] ffffffff810bf5d1 ffff8800c427a900 ffffffff81e566c0 ffff880217603dd0 [202168.442583] ffffffff8119a3cf ffff8802177d80c0 ffffffff81e566c0 ffffffff81f89ae0 [202168.442586] Call Trace: [202168.442587] <IRQ> [<ffffffff810bf66a>] sched_show_task+0xfa/0x160 [202168.442604] [<ffffffff810bf5d1>] ? sched_show_task+0x61/0x160 [202168.442606] [<ffffffff8119a3cf>] rcu_print_detail_task_stall_rnp+0x52/0x76 [202168.442609] [<ffffffff81103176>] rcu_check_callbacks+0x866/0x9e0 [202168.442611] [<ffffffff81108e79>] update_process_times+0x39/0x60 [202168.442613] [<ffffffff8111a831>] tick_sched_handle.isra.5+0x21/0x60 [202168.442615] [<ffffffff8111a8b2>] tick_sched_timer+0x42/0x70 [202168.442617] [<ffffffff81109860>] __hrtimer_run_queues+0x140/0x3c0 [202168.442618] [<ffffffff8111a870>] ? tick_sched_handle.isra.5+0x60/0x60 [202168.442620] [<ffffffff8110a233>] hrtimer_interrupt+0xb3/0x1c0 [202168.442622] [<ffffffff8103b896>] local_apic_timer_interrupt+0x36/0x60 [202168.442625] [<ffffffff819ad06d>] smp_apic_timer_interrupt+0x3d/0x50 [202168.442626] [<ffffffff819ab53c>] apic_timer_interrupt+0x8c/0xa0 [202168.442627] <EOI> [<ffffffff8183b425>] ? __nf_conntrack_find_get+0x285/0x420 [202168.442630] [<ffffffff8183d291>] ? nf_conntrack_in+0x1d1/0x8d0 [202168.442631] [<ffffffff8183d291>] nf_conntrack_in+0x1d1/0x8d0 [202168.442633] [<ffffffff818fb835>] ipv4_conntrack_local+0x45/0x50 [202168.442635] [<ffffffff818350b2>] nf_iterate+0x62/0x80 [202168.442637] [<ffffffff81835170>] nf_hook_slow+0xa0/0x110 [202168.442639] [<ffffffff818350d5>] ? nf_hook_slow+0x5/0x110 [202168.442641] [<ffffffff818aa408>] __ip_local_out+0xd8/0x120 [202168.442643] [<ffffffff818a8240>] ? ip_forward_options+0x1f0/0x1f0 [202168.442644] [<ffffffff818aa46c>] ip_local_out+0x1c/0x70 [202168.442646] [<ffffffff818aa84f>] ip_queue_xmit+0x18f/0x450 [202168.442647] [<ffffffff818aa6c5>] ? ip_queue_xmit+0x5/0x450 [202168.442649] [<ffffffff818c307b>] tcp_transmit_skb+0x48b/0x8e0 [202168.442651] [<ffffffff818c4dd9>] tcp_connect+0x629/0x830 [202168.442653] [<ffffffff817f56ff>] ? secure_tcp_sequence_number+0x7f/0xe0 [202168.442655] [<ffffffff818c7f49>] tcp_v4_connect+0x2b9/0x460 [202168.442657] [<ffffffff818e2012>] __inet_stream_connect+0xb2/0x310 [202168.442659] [<ffffffff810b9051>] ? preempt_count_sub+0xa1/0x100 [202168.442661] [<ffffffff817e5061>] ? lock_sock_nested+0x31/0x90 [202168.442663] [<ffffffff8109583f>] ? __local_bh_enable_ip+0x6f/0xd0 [202168.442665] [<ffffffff818e22a8>] inet_stream_connect+0x38/0x50 [202168.442666] [<ffffffff817e241b>] SyS_connect+0x7b/0xf0 [202168.442668] [<ffffffff817df485>] ? sock_alloc_file+0xa5/0x140 [202168.442670] [<ffffffff8100111a>] ? trace_hardirqs_on_thunk+0x1a/0x1c [202168.442671] [<ffffffff819aa8bc>] entry_SYSCALL_64_fastpath+0x1f/0xbd [202168.442673] client_socket_t R running task 0 14563 1 0x00000000 [202168.442674] ffff8800c427a900 00000000e1b77832 ffff880217603da0 ffffffff810bf66a [202168.442677] ffffffff810bf5d1 ffff8800c427a900 ffffffff81e566c0 ffff880217603dd0 [202168.442678] ffffffff8119a3cf ffff8802177d80c0 ffffffff81e566c0 ffffffff81f89ae0 [202168.442680] Call Trace: [202168.442681] <IRQ> [<ffffffff810bf66a>] sched_show_task+0xfa/0x160 [202168.442683] [<ffffffff810bf5d1>] ? sched_show_task+0x61/0x160 [202168.442685] [<ffffffff8119a3cf>] rcu_print_detail_task_stall_rnp+0x52/0x76 [202168.442686] [<ffffffff811031af>] rcu_check_callbacks+0x89f/0x9e0 [202168.442688] [<ffffffff81108e79>] update_process_times+0x39/0x60 [202168.442690] [<ffffffff8111a831>] tick_sched_handle.isra.5+0x21/0x60 [202168.442691] [<ffffffff8111a8b2>] tick_sched_timer+0x42/0x70 [202168.442692] [<ffffffff81109860>] __hrtimer_run_queues+0x140/0x3c0 [202168.442694] [<ffffffff8111a870>] ? tick_sched_handle.isra.5+0x60/0x60 [202168.442695] [<ffffffff8110a233>] hrtimer_interrupt+0xb3/0x1c0 [202168.442697] [<ffffffff8103b896>] local_apic_timer_interrupt+0x36/0x60 [202168.442699] [<ffffffff819ad06d>] smp_apic_timer_interrupt+0x3d/0x50 [202168.442700] [<ffffffff819ab53c>] apic_timer_interrupt+0x8c/0xa0 [202168.442701] <EOI> [<ffffffff8183b425>] ? __nf_conntrack_find_get+0x285/0x420 [202168.442703] [<ffffffff8183d291>] ? nf_conntrack_in+0x1d1/0x8d0 [202168.442704] [<ffffffff8183d291>] nf_conntrack_in+0x1d1/0x8d0 [202168.442706] [<ffffffff818fb835>] ipv4_conntrack_local+0x45/0x50 [202168.442708] [<ffffffff818350b2>] nf_iterate+0x62/0x80 [202168.442709] [<ffffffff81835170>] nf_hook_slow+0xa0/0x110 [202168.442711] [<ffffffff818350d5>] ? nf_hook_slow+0x5/0x110 [202168.442712] [<ffffffff818aa408>] __ip_local_out+0xd8/0x120 [202168.442714] [<ffffffff818a8240>] ? ip_forward_options+0x1f0/0x1f0 [202168.442715] [<ffffffff818aa46c>] ip_local_out+0x1c/0x70 [202168.442717] [<ffffffff818aa84f>] ip_queue_xmit+0x18f/0x450 [202168.442718] [<ffffffff818aa6c5>] ? ip_queue_xmit+0x5/0x450 [202168.442720] [<ffffffff818c307b>] tcp_transmit_skb+0x48b/0x8e0 [202168.442721] [<ffffffff818c4dd9>] tcp_connect+0x629/0x830 [202168.442723] [<ffffffff817f56ff>] ? secure_tcp_sequence_number+0x7f/0xe0 [202168.442725] [<ffffffff818c7f49>] tcp_v4_connect+0x2b9/0x460 [202168.442726] [<ffffffff818e2012>] __inet_stream_connect+0xb2/0x310 [202168.442728] [<ffffffff810b9051>] ? preempt_count_sub+0xa1/0x100 [202168.442730] [<ffffffff817e5061>] ? lock_sock_nested+0x31/0x90 [202168.442731] [<ffffffff8109583f>] ? __local_bh_enable_ip+0x6f/0xd0 [202168.442733] [<ffffffff818e22a8>] inet_stream_connect+0x38/0x50 [202168.442734] [<ffffffff817e241b>] SyS_connect+0x7b/0xf0 [202168.442736] [<ffffffff817df485>] ? sock_alloc_file+0xa5/0x140 [202168.442737] [<ffffffff8100111a>] ? trace_hardirqs_on_thunk+0x1a/0x1c [202168.442739] [<ffffffff819aa8bc>] entry_SYSCALL_64_fastpath+0x1f/0xbd Johannes -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
