Return-Path: Received: from mordac.selfhost.de ([82.98.82.6]:43017 "EHLO outgoing.selfhost.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750820AbeC1KfC (ORCPT ); Wed, 28 Mar 2018 06:35:02 -0400 To: linux-nfs@vger.kernel.org From: Harald Dunkel Subject: 4.9.82 (Debian): rcu_sched self-detected stall on CPU Message-ID: <25bef31b-44c2-475e-6536-8a8ff639fe1e@afaics.de> Date: Wed, 28 Mar 2018 12:28:19 +0200 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------20C8290D73BA9097DC0D69B0" Sender: linux-nfs-owner@vger.kernel.org List-ID: This is a multi-part message in MIME format. --------------20C8290D73BA9097DC0D69B0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Hi folks, using Debian's 4.9.82 kernel one of our PCs became unresponsive. The log file shows: Mar 27 18:04:11 dpcl017 kernel: [895316.531487] INFO: rcu_sched self-detected stall on CPU Mar 27 18:04:11 dpcl017 kernel: [895316.531492] 1-...: (5248 ticks this GP) idle=7af/140000000000001/0 softirq=42169443/42169443 fqs=2624 Mar 27 18:04:11 dpcl017 kernel: [895316.531494] (t=5250 jiffies g=27560104 c=27560103 q=82482) Mar 27 18:04:11 dpcl017 kernel: [895316.531496] Task dump for CPU 1: Mar 27 18:04:11 dpcl017 kernel: [895316.531496] TaskSchedulerBa R running task 0 29775 1 0x00000008 Mar 27 18:04:11 dpcl017 kernel: [895316.531499] ffffffffbbb18cc0 ffffffffbaea487b 0000000000000001 ffffffffbbb18cc0 Mar 27 18:04:11 dpcl017 kernel: [895316.531500] ffffffffbaf7d54b ffff8f377f499680 ffffffffbba4fc00 0000000000000000 Mar 27 18:04:11 dpcl017 kernel: [895316.531502] ffffffffbbb18cc0 00000000ffffffff ffffffffbaee00ca 0000000000ca133f Mar 27 18:04:11 dpcl017 kernel: [895316.531504] Call Trace: Mar 27 18:04:11 dpcl017 kernel: [895316.531505] Mar 27 18:04:11 dpcl017 kernel: [895316.531508] [] ? sched_show_task+0xcb/0x130 Mar 27 18:04:11 dpcl017 kernel: [895316.531510] [] ? rcu_dump_cpu_stacks+0x92/0xb2 Mar 27 18:04:11 dpcl017 kernel: [895316.531512] [] ? rcu_check_callbacks+0x75a/0x8b0 Mar 27 18:04:11 dpcl017 kernel: [895316.531514] [] ? update_wall_time+0x498/0x7b0 Mar 27 18:04:11 dpcl017 kernel: [895316.531516] [] ? tick_sched_handle.isra.12+0x50/0x50 Mar 27 18:04:11 dpcl017 kernel: [895316.531517] [] ? update_process_times+0x28/0x50 Mar 27 18:04:11 dpcl017 kernel: [895316.531519] [] ? tick_sched_handle.isra.12+0x20/0x50 Mar 27 18:04:11 dpcl017 kernel: [895316.531520] [] ? tick_sched_timer+0x38/0x70 Mar 27 18:04:11 dpcl017 kernel: [895316.531521] [] ? __hrtimer_run_queues+0xde/0x250 Mar 27 18:04:11 dpcl017 kernel: [895316.531522] [] ? hrtimer_interrupt+0x9c/0x1a0 Mar 27 18:04:11 dpcl017 kernel: [895316.531524] [] ? smp_apic_timer_interrupt+0x3f/0x50 Mar 27 18:04:11 dpcl017 kernel: [895316.531525] [] ? apic_timer_interrupt+0x96/0xa0 Mar 27 18:04:11 dpcl017 kernel: [895316.531525] Mar 27 18:04:11 dpcl017 kernel: [895316.531536] [] ? nfs_commit_end+0x8/0x20 [nfs] Mar 27 18:04:11 dpcl017 kernel: [895316.531541] [] ? nfs_commit_inode+0xac/0x150 [nfs] Mar 27 18:04:11 dpcl017 kernel: [895316.531546] [] ? nfs_wb_single_page+0x98/0x190 [nfs] Mar 27 18:04:11 dpcl017 kernel: [895316.531550] [] ? nfs_updatepage+0x376/0x910 [nfs] Mar 27 18:04:11 dpcl017 kernel: [895316.531555] [] ? nfs_write_end+0x140/0x4f0 [nfs] Mar 27 18:04:11 dpcl017 kernel: [895316.531557] [] ? generic_perform_write+0x122/0x1d0 Mar 27 18:04:11 dpcl017 kernel: [895316.531562] [] ? nfs_file_write+0xd5/0x200 [nfs] Mar 27 18:04:11 dpcl017 kernel: [895316.531564] [] ? new_sync_write+0xe0/0x130 Mar 27 18:04:11 dpcl017 kernel: [895316.531565] [] ? vfs_write+0xb0/0x190 Mar 27 18:04:11 dpcl017 kernel: [895316.531566] [] ? SyS_pwrite64+0x90/0xb0 Mar 27 18:04:11 dpcl017 kernel: [895316.531568] [] ? do_syscall_64+0x8f/0xf0 Mar 27 18:04:11 dpcl017 kernel: [895316.531570] [] ? entry_SYSCALL_64_after_swapgs+0x42/0xb0 Mar 27 18:04:38 dpcl017 kernel: [895342.962258] NMI watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [TaskSchedulerBa:29775] Mar 27 18:04:38 dpcl017 kernel: [895342.962260] Modules linked in: cpuid fuse rfcomm pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) cpufreq_userspace vboxdrv(O) cpufreq_conservative cpufreq_powersave rpcsec_gs Mar 27 18:04:38 dpcl017 kernel: [895342.962289] drm_kms_helper drm nvidia_modeset(PO) nvidia(PO) ip_tables x_tables autofs4 hid_generic usbhid hid ext4 crc16 jbd2 fscrypto ecb mbcache btrfs raid10 raid456 asyn Mar 27 18:04:38 dpcl017 kernel: [895342.962315] CPU: 1 PID: 29775 Comm: TaskSchedulerBa Tainted: P O 4.9.0-6-amd64 #1 Debian 4.9.82-1+deb9u3 Mar 27 18:04:38 dpcl017 kernel: [895342.962315] Hardware name: System manufacturer System Product Name/P8P67, BIOS 1503 03/10/2011 Mar 27 18:04:38 dpcl017 kernel: [895342.962316] task: ffff8f3654f3d000 task.stack: ffffaf6348d10000 Mar 27 18:04:38 dpcl017 kernel: [895342.962317] RIP: 0010:[] [] page_mkclean+0x4b/0xc0 Mar 27 18:04:38 dpcl017 kernel: [895342.962321] RSP: 0000:ffffaf6348d13be8 EFLAGS: 00000246 Mar 27 18:04:38 dpcl017 kernel: [895342.962322] RAX: ffffaf6348d13bec RBX: ffffee2e0bc7d700 RCX: 0000000000000000 Mar 27 18:04:38 dpcl017 kernel: [895342.962322] RDX: ffffee2e1092d420 RSI: 0000000000000000 RDI: ffffee2e0bc7d700 Mar 27 18:04:38 dpcl017 kernel: [895342.962323] RBP: ffff8f354a94ab50 R08: 0000000000000101 R09: 0000000000000000 Mar 27 18:04:38 dpcl017 kernel: [895342.962324] R10: 00000000033ac538 R11: 00000000034cdfd3 R12: ffff8f354a94ab50 Mar 27 18:04:38 dpcl017 kernel: [895342.962324] R13: ffffaf6348d13c60 R14: 0000000000000000 R15: ffff8f354a94ab50 Mar 27 18:04:38 dpcl017 kernel: [895342.962325] FS: 00007fd013827700(0000) GS:ffff8f377f480000(0000) knlGS:0000000000000000 Mar 27 18:04:38 dpcl017 kernel: [895342.962326] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Mar 27 18:04:38 dpcl017 kernel: [895342.962327] CR2: 000015cb433c7208 CR3: 0000000320130000 CR4: 0000000000062670 Mar 27 18:04:38 dpcl017 kernel: [895342.962327] Stack: Mar 27 18:04:38 dpcl017 kernel: [895342.962328] 00000000c19dcf1c ffffaf6348d13bec ffffffffbafc29e0 0000000000000000 Mar 27 18:04:38 dpcl017 kernel: [895342.962330] 0000000000000000 0000000000000000 02a4b91511383e4f ffffee2e0bc7d700 : : Full log is attached. Does this sound familiar? 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