[28965.617351] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[28965.623289] rcu:     40-...0: (0 ticks this GP) idle=7564/1/0x4000000000000000 softirq=21359/21359 fqs=3000
[28965.632770] rcu:     41-...0: (0 ticks this GP) idle=b4b4/1/0x4000000000000000 softirq=5243/5243 fqs=3001
[28965.642072] rcu:     46-...0: (4 GPs behind) idle=c31c/1/0x4000000000000000 softirq=17661/17662 fqs=3001
[28965.651287] rcu:     58-...0: (1 GPs behind) idle=e7ac/1/0x4000000000000000 softirq=11682/11682 fqs=3001
[28965.660501] rcu:     62-...0: (1 GPs behind) idle=73e4/1/0x4000000000000000 softirq=11308/11310 fqs=3001
[28965.669728]  (detected by 15, t=6007 jiffies, g=426025, q=105 ncpus=64)
[28965.676341] Task dump for CPU 40:
[28965.679654] task:Xorg            state:R  running task     stack:0     pid:899   ppid:892    flags:0x00000008
[28965.689569] Call Trace:
[28965.692015] [<ffffffff80c642b2>] __schedule+0x312/0x8e8
[28965.697251] Task dump for CPU 41:
[28965.700564] task:firefox         state:R  running task     stack:0     pid:1571  ppid:966    flags:0x00000008
[28965.710476] Call Trace:
[28965.712920] [<ffffffff80c642b2>] __schedule+0x312/0x8e8
[28965.718143] Task dump for CPU 46:
[28965.721456] task:IPDL Background state:R  running task     stack:0     pid:1586  ppid:966    flags:0x00000008
[28965.731366] Call Trace:
[28965.733811] [<ffffffff80c642b2>] __schedule+0x312/0x8e8
[28965.739036] Task dump for CPU 58:
[28965.742346] task:Renderer        state:R  running task     stack:0     pid:1625  ppid:966    flags:0x00000008
[28965.752257] Call Trace:
[28965.754702] [<ffffffff80c642b2>] __schedule+0x312/0x8e8
[28965.759925] Task dump for CPU 62:
[28965.763237] task:firefox:gdrv0   state:R  running task     stack:0     pid:1642  ppid:966    flags:0x00000008
[28965.773147] Call Trace:
[28965.775591] [<ffffffff80c642b2>] __schedule+0x312/0x8e8
[28965.780814] [<ffffffff80c648d6>] schedule+0x4e/0xd0
[28965.785690] [<ffffffff800c5a0e>] futex_wait_queue+0x9a/0xc0
[28965.791261] [<ffffffff800c5fbc>] futex_wait+0xec/0x170
[28965.796396] [<ffffffff800c2d08>] do_futex+0xd6/0x13a
[28965.801363] [<ffffffff800c2e44>] sys_futex+0xd8/0x156
[28965.806414] [<ffffffff80003c8e>] ret_from_syscall+0x0/0x2
[29128.285474] systemd[1]: systemd-logind.service: Watchdog timeout (limit 3min)!
[29128.292868] systemd[1]: systemd-logind.service: Killing process 872 (systemd-logind) with signal SIGABRT.
[29145.860442] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[29145.866376] rcu:     40-...0: (0 ticks this GP) idle=7564/1/0x4000000000000000 softirq=21359/21359 fqs=11811
[29145.875945] rcu:     41-...0: (0 ticks this GP) idle=b4b4/1/0x4000000000000000 softirq=5243/5243 fqs=11811
[29145.885334] rcu:     46-...0: (4 GPs behind) idle=c31c/1/0x4000000000000000 softirq=17661/17662 fqs=11811
[29145.894636] rcu:     58-...0: (1 GPs behind) idle=e7ac/1/0x4000000000000000 softirq=11682/11682 fqs=11811
[29145.903936] rcu:     62-...0: (1 GPs behind) idle=73e4/1/0x4000000000000000 softirq=11308/11310 fqs=11811
[29145.913247]  (detected by 21, t=24031 jiffies, g=426025, q=144 ncpus=64)
[29145.919948] Task dump for CPU 40:
[29145.923261] task:Xorg            state:R  running task     stack:0     pid:899   ppid:892    flags:0x00000008
[29145.933175] Call Trace:
[29145.935621] [<ffffffff80c642b2>] __schedule+0x312/0x8e8
[29145.940857] Task dump for CPU 41:
[29145.944170] task:firefox         state:R  running task     stack:0     pid:1571  ppid:966    flags:0x00000008
[29145.954081] Call Trace:
[29145.956526] [<ffffffff80c642b2>] __schedule+0x312/0x8e8
[29145.961750] Task dump for CPU 46:
[29145.965062] task:IPDL Background state:R  running task     stack:0     pid:1586  ppid:966    flags:0x00000008
[29145.974971] Call Trace:
[29145.977416] [<ffffffff80c642b2>] __schedule+0x312/0x8e8
[29145.982640] Task dump for CPU 58:
[29145.985951] task:Renderer        state:R  running task     stack:0     pid:1625  ppid:966    flags:0x00000008
[29145.995861] Call Trace:
[29145.998305] [<ffffffff80c642b2>] __schedule+0x312/0x8e8
[29146.003529] Task dump for CPU 62:
[29146.006841] task:firefox:gdrv0   state:R  running task     stack:0     pid:1642  ppid:966    flags:0x00000008
[29146.016751] Call Trace:
[29146.019195] [<ffffffff80c642b2>] __schedule+0x312/0x8e8
[29146.024417] [<ffffffff80c648d6>] schedule+0x4e/0xd0
[29146.029293] [<ffffffff800c5a0e>] futex_wait_queue+0x9a/0xc0
[29146.034865] [<ffffffff800c5fbc>] futex_wait+0xec/0x170
[29146.040001] [<ffffffff800c2d08>] do_futex+0xd6/0x13a
[29146.044968] [<ffffffff800c2e44>] sys_futex+0xd8/0x156
[29146.050018] [<ffffffff80003c8e>] ret_from_syscall+0x0/0x2