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Description of problem: -possible spinlock issue on quadro k420 in nouveau Version-Release number of selected component (if applicable): - RHEL 7.1 - xorg-x11-drv-nouveau-1.0.10-5.el7.x86_64 - libdrm-2.4.56-2.el7.x86_64 How reproducible: - intermittent Steps to Reproduce: 1. unsure, happens occasionally 2. 3. Actual results: - softlockup on what appears to be a spinlock issue Expected results: Additional info: 01:00.0 VGA compatible controller: NVIDIA Corporation GK107GL [Quadro K420] (rev a1) 01:00.1 Audio device: NVIDIA Corporation GK107 HDMI Audio Controller (rev a1) Jan 25 11:11:06 dhws122 kernel: [1536034.220466] nouveau E[ PFIFO][0000:01:00.0] write fault at 0x0005924000 [PTE] from CE2/GR_COPY on channel 0x003fa31000 [Xorg[18982]] Jan 25 11:11:06 dhws122 kernel: [1536034.220471] nouveau E[ PFIFO][0000:01:00.0] PCE2 engine fault on channel 2, recovering... Jan 25 11:11:21 dhws122 kernel: [1536049.624322] nouveau E[ DRM] GPU lockup - switching to software fbcon Jan 25 11:11:31 dhws122 kernel: [1536060.033767] BUG: soft lockup - CPU#0 stuck for 22s! [kworker/0:1:15476] Jan 25 11:11:31 dhws122 kernel: [1536060.033800] Modules linked in: binfmt_misc bnep bluetooth fuse mvfs(OF) nfsv3 nfs_acl rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd sunrpc fscache intel_powerclamp coretemp snd_hda_codec_hdmi hp_wmi snd_hda_codec_realtek sparse_keymap snd_hda_codec_generic intel_rapl kvm snd_hda_intel crct10dif_pclmul crc32_pclmul snd_hda_controller crc32c_intel ghash_clmulni_intel snd_hda_codec aesni_intel snd_hwdep lrw gf128mul glue_helper ablk_helper cryptd snd_seq snd_seq_device iTCO_wdt snd_pcm iTCO_vendor_support rfkill ppdev serio_raw pcspkr i2c_i801 lpc_ich mei_me snd_timer mfd_core mei snd soundcore shpchp parport_pc parport tpm_infineon uinput ext4 mbcache jbd2 sd_mod crc_t10dif crct10dif_common nouveau video mxm_wmi i2c_algo_bit drm_kms_helper ttm ahci e1000e libahci drm libata ptp pps_core i2c_core wmi dm_mirror dm_region_hash dm_log dm_mod Jan 25 11:11:31 dhws122 kernel: [1536060.033850] CPU: 0 PID: 15476 Comm: kworker/0:1 Tainted: GF O-------------- 3.10.0-229.7.2.el7.x86_64 #1 Jan 25 11:11:31 dhws122 kernel: [1536060.033851] Hardware name: Hewlett-Packard HP Z230 SFF Workstation/1906, BIOS L51 v01.52 07/20/2015 Jan 25 11:11:31 dhws122 kernel: [1536060.033877] Workqueue: events nve0_fifo_recover_work [nouveau] Jan 25 11:11:31 dhws122 kernel: [1536060.033878] task: ffff8804129896c0 ti: ffff8800bde18000 task.ti: ffff8800bde18000 Jan 25 11:11:31 dhws122 kernel: [1536060.033879] RIP: 0010:[<ffffffffa01ef688>] [<ffffffffa01ef688>] nve0_fifo_recover_work+0x88/0x330 [nouveau] Jan 25 11:11:31 dhws122 kernel: [1536060.033896] RSP: 0018:ffff8800bde1bde0 EFLAGS: 00000202 Jan 25 11:11:31 dhws122 kernel: [1536060.033897] RAX: 0000000100000000 RBX: ffff8800bde1bd70 RCX: 0000000000000020 Jan 25 11:11:31 dhws122 kernel: [1536060.033898] RDX: 00000000fffffffe RSI: 0000000000000282 RDI: 0000000000000282 Jan 25 11:11:31 dhws122 kernel: [1536060.033899] RBP: ffff8800bde1be18 R08: 0000000000000282 R09: dfef3a34a013dcd8 Jan 25 11:11:31 dhws122 kernel: [1536060.033899] R10: dfef3a34a013dcd8 R11: 0000000000000293 R12: ffff8800bde1bd60 Jan 25 11:11:31 dhws122 kernel: [1536060.033900] R13: ffff88041d010100 R14: 0000000000000400 R15: 0000000200000000 Jan 25 11:11:31 dhws122 kernel: [1536060.033901] FS: 0000000000000000(0000) GS:ffff88042dc00000(0000) knlGS:0000000000000000 Jan 25 11:11:31 dhws122 kernel: [1536060.033902] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jan 25 11:11:31 dhws122 kernel: [1536060.033903] CR2: 00007f64da427000 CR3: 00000001970d4000 CR4: 00000000001407f0 Jan 25 11:11:31 dhws122 kernel: [1536060.033904] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Jan 25 11:11:31 dhws122 kernel: [1536060.033905] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Jan 25 11:11:31 dhws122 kernel: [1536060.033905] Stack: Jan 25 11:11:31 dhws122 kernel: [1536060.033906] ffff8802de7a5140 ffff88042df87d00 ffff88041373dcd8 ffff880307610580 Jan 25 11:11:31 dhws122 kernel: [1536060.033908] ffff88042dc12ec0 ffff88042dc17000 0000000000000000 ffff8800bde1be60 Jan 25 11:11:31 dhws122 kernel: [1536060.033910] ffffffff8108f0bb 000000002dc12ed8 0000000000000000 ffff88042dc12ed8 Jan 25 11:11:31 dhws122 kernel: [1536060.033912] Call Trace: Jan 25 11:11:31 dhws122 kernel: [1536060.033915] [<ffffffff8108f0bb>] process_one_work+0x17b/0x470 Jan 25 11:11:31 dhws122 kernel: [1536060.033917] [<ffffffff8108fe8b>] worker_thread+0x11b/0x400 Jan 25 11:11:31 dhws122 kernel: [1536060.033919] [<ffffffff8108fd70>] ? rescuer_thread+0x400/0x400 Jan 25 11:11:31 dhws122 kernel: [1536060.033921] [<ffffffff8109726f>] kthread+0xcf/0xe0 Jan 25 11:11:31 dhws122 kernel: [1536060.033922] [<ffffffff810971a0>] ? kthread_create_on_node+0x140/0x140 Jan 25 11:11:31 dhws122 kernel: [1536060.033925] [<ffffffff81614158>] ret_from_fork+0x58/0x90 Jan 25 11:11:31 dhws122 kernel: [1536060.033927] [<ffffffff810971a0>] ? kthread_create_on_node+0x140/0x140 Jan 25 11:11:31 dhws122 kernel: [1536060.033927] Code: 00 00 00 83 ea 17 83 fa 0b 0f 87 64 02 00 00 ff 24 d5 90 c7 24 a0 0f 1f 44 00 00 ba 01 00 00 00 0f 1f 00 41 09 d6 ba fe ff ff ff <d3> c2 48 63 d2 48 21 d0 f3 48 0f bc c8 48 85 c0 89 ca 75 c4 49 Jan 25 11:11:36 dhws122 kernel: [1536064.638747] nouveau E[Xorg[18982]] failed to idle channel 0xcccc0001 [Xorg[18982]] Jan 25 11:11:51 dhws122 kernel: [1536079.645191] nouveau E[Xorg[18982]] failed to idle channel 0xcccc0001 [Xorg[18982]] Jan 25 11:11:53 dhws122 kernel: [1536081.646068] nouveau E[ PFIFO][0000:01:00.0] runlist 0 update timeout Jan 25 11:11:55 dhws122 kernel: [1536083.941920] nouveau E[ PFIFO][0000:01:00.0] SCHED_ERROR [ CTXSW_TIMEOUT ] Jan 25 11:11:58 dhws122 /etc/gdm/Xsession[19164]: (abrt:19922): libnotify-WARNING **: Failed to connect to proxy Jan 25 11:11:58 dhws122 /etc/gdm/Xsession[19164]: abrt-applet: Failed to receive server caps Jan 25 11:11:59 dhws122 kernel: [1536088.045796] BUG: soft lockup - CPU#0 stuck for 22s! [kworker/0:1:15476] Jan 25 11:11:59 dhws122 kernel: [1536088.045823] Modules linked in: binfmt_misc bnep bluetooth fuse mvfs(OF) nfsv3 nfs_acl rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd sunrpc fscache intel_powerclamp coretemp snd_hda_codec_hdmi hp_wmi snd_hda_codec_realtek sparse_keymap snd_hda_codec_generic intel_rapl kvm snd_hda_intel crct10dif_pclmul crc32_pclmul snd_hda_controller crc32c_intel ghash_clmulni_intel snd_hda_codec aesni_intel snd_hwdep lrw gf128mul glue_helper ablk_helper cryptd snd_seq snd_seq_device iTCO_wdt snd_pcm iTCO_vendor_support rfkill ppdev serio_raw pcspkr i2c_i801 lpc_ich mei_me snd_timer mfd_core mei snd soundcore shpchp parport_pc parport tpm_infineon uinput ext4 mbcache jbd2 sd_mod crc_t10dif crct10dif_common nouveau video mxm_wmi i2c_algo_bit drm_kms_helper ttm ahci e1000e libahci drm libata ptp pps_core i2c_core wmi dm_mirror dm_region_hash dm_log dm_mod Jan 25 11:11:59 dhws122 kernel: [1536088.045868] CPU: 0 PID: 15476 Comm: kworker/0:1 Tainted: GF O-------------- 3.10.0-229.7.2.el7.x86_64 #1 Jan 25 11:11:59 dhws122 kernel: [1536088.045869] Hardware name: Hewlett-Packard HP Z230 SFF Workstation/1906, BIOS L51 v01.52 07/20/2015 Jan 25 11:11:59 dhws122 kernel: [1536088.045889] Workqueue: events nve0_fifo_recover_work [nouveau] Jan 25 11:11:59 dhws122 kernel: [1536088.045890] task: ffff8804129896c0 ti: ffff8800bde18000 task.ti: ffff8800bde18000 Jan 25 11:11:59 dhws122 kernel: [1536088.045891] RIP: 0010:[<ffffffffa01ef678>] [<ffffffffa01ef678>] nve0_fifo_recover_work+0x78/0x330 [nouveau] Jan 25 11:11:59 dhws122 kernel: [1536088.045905] RSP: 0018:ffff8800bde1bde0 EFLAGS: 00000293 Jan 25 11:11:59 dhws122 kernel: [1536088.045906] RAX: 0000000100000000 RBX: ffff8800bde1bd70 RCX: 0000000000000020 Jan 25 11:11:59 dhws122 kernel: [1536088.045907] RDX: 0000000000000009 RSI: 0000000000000282 RDI: 0000000000000282 Jan 25 11:11:59 dhws122 kernel: [1536088.045907] RBP: ffff8800bde1be18 R08: 0000000000000282 R09: dfef3a34a013dcd8 Jan 25 11:11:59 dhws122 kernel: [1536088.045908] R10: dfef3a34a013dcd8 R11: 0000000000000293 R12: ffff8800bde1bd60 Jan 25 11:11:59 dhws122 kernel: [1536088.045909] R13: ffff88041d010100 R14: 0000000000000400 R15: 0000000200000000 Jan 25 11:11:59 dhws122 kernel: [1536088.045910] FS: 0000000000000000(0000) GS:ffff88042dc00000(0000) knlGS:0000000000000000 Jan 25 11:11:59 dhws122 kernel: [1536088.045910] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jan 25 11:11:59 dhws122 kernel: [1536088.045911] CR2: 00007f64da427000 CR3: 00000001970d4000 CR4: 00000000001407f0 Jan 25 11:11:59 dhws122 kernel: [1536088.045912] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Jan 25 11:11:59 dhws122 kernel: [1536088.045913] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Jan 25 11:11:59 dhws122 kernel: [1536088.045914] Stack: Jan 25 11:11:59 dhws122 kernel: [1536088.045914] ffff8802de7a5140 ffff88042df87d00 ffff88041373dcd8 ffff880307610580 Jan 25 11:11:59 dhws122 kernel: [1536088.045916] ffff88042dc12ec0 ffff88042dc17000 0000000000000000 ffff8800bde1be60 Jan 25 11:11:59 dhws122 kernel: [1536088.045917] ffffffff8108f0bb 000000002dc12ed8 0000000000000000 ffff88042dc12ed8 Jan 25 11:11:59 dhws122 kernel: [1536088.045918] Call Trace: Jan 25 11:11:59 dhws122 kernel: [1536088.045922] [<ffffffff8108f0bb>] process_one_work+0x17b/0x470 Jan 25 11:11:59 dhws122 kernel: [1536088.045923] [<ffffffff8108fe8b>] worker_thread+0x11b/0x400 Jan 25 11:11:59 dhws122 kernel: [1536088.045925] [<ffffffff8108fd70>] ? rescuer_thread+0x400/0x400 Jan 25 11:11:59 dhws122 kernel: [1536088.045927] [<ffffffff8109726f>] kthread+0xcf/0xe0 Jan 25 11:11:59 dhws122 kernel: [1536088.045928] [<ffffffff810971a0>] ? kthread_create_on_node+0x140/0x140 Jan 25 11:11:59 dhws122 kernel: [1536088.045931] [<ffffffff81614158>] ret_from_fork+0x58/0x90 Jan 25 11:11:59 dhws122 kernel: [1536088.045932] [<ffffffff810971a0>] ? kthread_create_on_node+0x140/0x140 Jan 25 11:11:59 dhws122 kernel: [1536088.045933] Code: 86 02 00 00 89 ca 48 89 d8 45 31 f6 0f 1f 80 00 00 00 00 83 ea 17 83 fa 0b 0f 87 64 02 00 00 ff 24 d5 90 c7 24 a0 0f 1f 44 00 00 <ba> 01 00 00 00 0f 1f 00 41 09 d6 ba fe ff ff ff d3 c2 48 63 d2 Jan 25 11:12:00 dhws122 kernel: [1536088.238462] nouveau E[ PFIFO][0000:01:00.0] SCHED_ERROR [ CTXSW_TIMEOUT ] Jan 25 11:12:04 dhws122 kernel: [1536092.535003] nouveau E[ PFIFO][0000:01:00.0] SCHED_ERROR [ CTXSW_TIMEOUT ] Jan 25 11:12:06 dhws122 kernel: [1536094.246459] INFO: rcu_sched self-detected stall on CPU { 0} (t=60000 jiffies g=37003578 c=37003577 q=0) Jan 25 11:12:06 dhws122 kernel: [1536094.246495] sending NMI to all CPUs: Jan 25 11:12:06 dhws122 kernel: [1536094.246497] NMI backtrace for cpu 0 Jan 25 11:12:06 dhws122 kernel: [1536094.246499] CPU: 0 PID: 15476 Comm: kworker/0:1 Tainted: GF O-------------- 3.10.0-229.7.2.el7.x86_64 #1 Jan 25 11:12:06 dhws122 kernel: [1536094.246512] Hardware name: Hewlett-Packard HP Z230 SFF Workstation/1906, BIOS L51 v01.52 07/20/2015 Jan 25 11:12:06 dhws122 kernel: [1536094.246546] Workqueue: events nve0_fifo_recover_work [nouveau] Jan 25 11:12:06 dhws122 kernel: [1536094.246547] task: ffff8804129896c0 ti: ffff8800bde18000 task.ti: ffff8800bde18000 Jan 25 11:12:06 dhws122 kernel: [1536094.246549] RIP: 0010:[<ffffffff812e1852>] [<ffffffff812e1852>] __const_udelay+0x12/0x30 Jan 25 11:12:06 dhws122 kernel: [1536094.246553] RSP: 0018:ffff88042dc03de0 EFLAGS: 00000046 Jan 25 11:12:06 dhws122 kernel: [1536094.246554] RAX: 0000000001062560 RBX: 0000000000002710 RCX: 0000000000000008 Jan 25 11:12:06 dhws122 kernel: [1536094.246556] RDX: 000000000033c311 RSI: 0000000000000008 RDI: 0000000000418958 Jan 25 11:12:06 dhws122 kernel: [1536094.246557] RBP: ffff88042dc03df8 R08: 0000000000000092 R09: 00000000000003c4 Jan 25 11:12:06 dhws122 kernel: [1536094.246558] R10: 0000000000000000 R11: ffff88042dc03b06 R12: ffffffff81962680 Jan 25 11:12:06 dhws122 kernel: [1536094.246559] R13: ffffffff81962680 R14: ffff88042dc0de00 R15: 0000000000000000 Jan 25 11:12:06 dhws122 kernel: [1536094.246561] FS: 0000000000000000(0000) GS:ffff88042dc00000(0000) knlGS:0000000000000000 Jan 25 11:12:06 dhws122 kernel: [1536094.246562] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jan 25 11:12:06 dhws122 kernel: [1536094.246563] CR2: 00007f64da427000 CR3: 00000001970d4000 CR4: 00000000001407f0 Jan 25 11:12:06 dhws122 kernel: [1536094.246565] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Jan 25 11:12:06 dhws122 kernel: [1536094.246566] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Jan 25 11:12:06 dhws122 kernel: [1536094.246567] Stack: Jan 25 11:12:06 dhws122 kernel: [1536094.246568] ffff88042dc03df8 ffffffff81045e9a ffffffff81a21a00 ffff88042dc03e58 Jan 25 11:12:06 dhws122 kernel: [1536094.246571] ffffffff81115753 ffff8804129896c0 0000000000000000 00057478247380ab Jan 25 11:12:06 dhws122 kernel: [1536094.246573] ffff8800bde18000 0000000000000000 ffff8804129896c0 0000000000000000 Jan 25 11:12:06 dhws122 kernel: [1536094.246575] Call Trace: Jan 25 11:12:06 dhws122 kernel: [1536094.246576] <IRQ> Jan 25 11:12:06 dhws122 kernel: [1536094.246578] [<ffffffff81045e9a>] ? arch_trigger_all_cpu_backtrace+0x7a/0xa0 Jan 25 11:12:06 dhws122 kernel: [1536094.246584] [<ffffffff81115753>] rcu_check_callbacks+0x313/0x5f0 Jan 25 11:12:06 dhws122 kernel: [1536094.246588] [<ffffffff81080f37>] update_process_times+0x47/0x80 Jan 25 11:12:06 dhws122 kernel: [1536094.246591] [<ffffffff810d0405>] tick_sched_handle.isra.16+0x25/0x60 Jan 25 11:12:06 dhws122 kernel: [1536094.246593] [<ffffffff810d0481>] tick_sched_timer+0x41/0x60 Jan 25 11:12:06 dhws122 kernel: [1536094.246596] [<ffffffff8109b1a7>] __run_hrtimer+0x77/0x1d0 Jan 25 11:12:06 dhws122 kernel: [1536094.246598] [<ffffffff810d0440>] ? tick_sched_handle.isra.16+0x60/0x60 Jan 25 11:12:06 dhws122 kernel: [1536094.246601] [<ffffffff8109b9e7>] hrtimer_interrupt+0xf7/0x240 Jan 25 11:12:06 dhws122 kernel: [1536094.246603] [<ffffffff810441c7>] local_apic_timer_interrupt+0x37/0x60 Jan 25 11:12:06 dhws122 kernel: [1536094.246606] [<ffffffff8161678f>] smp_apic_timer_interrupt+0x3f/0x60 Jan 25 11:12:06 dhws122 kernel: [1536094.246609] [<ffffffff81614e5d>] apic_timer_interrupt+0x6d/0x80 Jan 25 11:12:06 dhws122 kernel: [1536094.246610] <EOI> Jan 25 11:12:06 dhws122 kernel: [1536094.246615] [<ffffffffa01ef678>] ? nve0_fifo_recover_work+0x78/0x330 [nouveau] Jan 25 11:12:06 dhws122 kernel: [1536094.246634] [<ffffffff8108f0bb>] process_one_work+0x17b/0x470 Jan 25 11:12:06 dhws122 kernel: [1536094.246637] [<ffffffff8108fe8b>] worker_thread+0x11b/0x400 Jan 25 11:12:06 dhws122 kernel: [1536094.246639] [<ffffffff8108fd70>] ? rescuer_thread+0x400/0x400 Jan 25 11:12:06 dhws122 kernel: [1536094.246641] [<ffffffff8109726f>] kthread+0xcf/0xe0 Jan 25 11:12:06 dhws122 kernel: [1536094.246643] [<ffffffff810971a0>] ? kthread_create_on_node+0x140/0x140 Jan 25 11:12:06 dhws122 kernel: [1536094.246646] [<ffffffff81614158>] ret_from_fork+0x58/0x90 Jan 25 11:12:06 dhws122 kernel: [1536094.246648] [<ffffffff810971a0>] ? kthread_create_on_node+0x140/0x140 Jan 25 11:12:06 dhws122 kernel: [1536094.246649] Code: 89 e5 ff 15 a9 43 6d 00 5d c3 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 8d 04 bd 00 00 00 00 65 48 8b 14 25 28 2e 01 00 <48> 89 e5 48 69 d2 fa 00 00 00 f7 e2 48 8d 7a 01 ff 15 70 43 6d Suspicion is that this soft lock up is caused by line 436 in 'drivers/gpu/drm/nouveau/core/engine/fifo/nve0.c' which is trying to acquire a spinlock : 427 static void 428 nve0_fifo_recover_work(struct work_struct *work) 429 { 430 struct nve0_fifo_priv *priv = container_of(work, typeof(*priv), fault); 431 struct nouveau_object *engine; 432 unsigned long flags; 433 u32 engn, engm = 0; 434 u64 mask, todo; 435 436 spin_lock_irqsave(&priv->base.lock, flags); 437 mask = priv->mask; 438 priv->mask = 0ULL; 439 spin_unlock_irqrestore(&priv->base.lock, flags); 440 441 for (todo = mask; engn = __ffs64(todo), todo; todo &= ~(1 << engn)) 442 engm |= 1 << nve0_fifo_engidx(priv, engn); 443 nv_mask(priv, 0x002630, engm, engm); 444 445 for (todo = mask; engn = __ffs64(todo), todo; todo &= ~(1 << engn)) { 446 if ((engine = (void *)nouveau_engine(priv, engn))) { 447 nv_ofuncs(engine)->fini(engine, false); 448 WARN_ON(nv_ofuncs(engine)->init(engine)); 449 } 450 nve0_fifo_runlist_update(priv, nve0_fifo_engidx(priv, engn)); 451 } 452 453 nv_wr32(priv, 0x00262c, engm); 454 nv_mask(priv, 0x002630, engm, 0x00000000); 455 } These may be relevant to what the customer is seeing https://bugs.centos.org/view.php?id=8700 https://bugs.freedesktop.org/show_bug.cgi?id=85086 https://bugs.freedesktop.org/show_bug.cgi?id=89985