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Message-ID: <193a0440eed447209c48bda042f0e4db102355e7.camel@redhat.com>
Date: Mon, 02 Nov 2020 10:18:51 -0500
From: Qian Cai <cai@...hat.com>
To: John Garry <john.garry@...wei.com>, axboe@...nel.dk,
jejb@...ux.ibm.com, martin.petersen@...cle.com,
don.brace@...rosemi.com, kashyap.desai@...adcom.com,
ming.lei@...hat.com, bvanassche@....org, dgilbert@...erlog.com,
paolo.valente@...aro.org, hare@...e.de, hch@....de
Cc: sumit.saxena@...adcom.com, linux-block@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
esc.storagedev@...rosemi.com, megaraidlinux.pdl@...adcom.com,
chenxiang66@...ilicon.com, luojiaxing@...wei.com,
Hannes Reinecke <hare@...e.com>
Subject: Re: [PATCH v8 17/18] scsi: megaraid_sas: Added support for shared
host tagset for cpuhotplug
On Mon, 2020-11-02 at 14:51 +0000, John Garry wrote:
> On 02/11/2020 14:17, Qian Cai wrote:
> > [ 251.961152][ T330] INFO: task systemd-udevd:567 blocked for more than
> > 122 seconds.
> > [ 251.968876][ T330] Not tainted 5.10.0-rc1-next-20201102 #1
> > [ 251.975003][ T330] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
> > disables this message.
> > [ 251.983546][ T330] task:systemd-udevd state:D stack:27224 pid: 567
> > ppid: 506 flags:0x00004324
> > [ 251.992620][ T330] Call Trace:
> > [ 251.995784][ T330] __schedule+0x71d/0x1b60
> > [ 252.000067][ T330] ? __sched_text_start+0x8/0x8
> > [ 252.004798][ T330] schedule+0xbf/0x270
> > [ 252.008735][ T330] schedule_timeout+0x3fc/0x590
> > [ 252.013464][ T330] ? usleep_range+0x120/0x120
> > [ 252.018008][ T330] ? wait_for_completion+0x156/0x250
> > [ 252.023176][ T330] ? lock_downgrade+0x700/0x700
> > [ 252.027886][ T330] ? rcu_read_unlock+0x40/0x40
> > [ 252.032530][ T330] ? do_raw_spin_lock+0x121/0x290
> > [ 252.037412][ T330] ? lockdep_hardirqs_on_prepare+0x27c/0x3d0
> > [ 252.043268][ T330] ? _raw_spin_unlock_irq+0x1f/0x30
> > [ 252.048331][ T330] wait_for_completion+0x15e/0x250
> > [ 252.053323][ T330] ? wait_for_completion_interruptible+0x320/0x320
> > [ 252.059687][ T330] ? lockdep_hardirqs_on_prepare+0x27c/0x3d0
> > [ 252.065543][ T330] ? _raw_spin_unlock_irq+0x1f/0x30
> > [ 252.070606][ T330] __flush_work+0x42a/0x900
> > [ 252.074989][ T330] ? queue_delayed_work_on+0x90/0x90
> > [ 252.080139][ T330] ? __queue_work+0x463/0xf40
> > [ 252.084700][ T330] ? init_pwq+0x320/0x320
> > [ 252.088891][ T330] ? queue_work_on+0x5e/0x80
> > [ 252.093364][ T330] ? trace_hardirqs_on+0x1c/0x150
> > [ 252.098255][ T330] work_on_cpu+0xe7/0x130
> > [ 252.102461][ T330] ? flush_delayed_work+0xc0/0xc0
> > [ 252.107342][ T330] ? __mutex_unlock_slowpath+0xd4/0x670
> > [ 252.112764][ T330] ? work_debug_hint+0x30/0x30
> > [ 252.117391][ T330] ? pci_device_shutdown+0x80/0x80
> > [ 252.122378][ T330] ? cpumask_next_and+0x57/0x80
> > [ 252.127094][ T330] pci_device_probe+0x500/0x5c0
> > [ 252.131824][ T330] ? pci_device_remove+0x1f0/0x1f0
>
> Is CONFIG_DEBUG_TEST_DRIVER_REMOVE enabled? I figure it is, with this call.
>
> Or please share the .config
No. https://cailca.coding.net/public/linux/mm/git/files/master/x86.config
>
> Cheers,
> John
>
> > [ 252.136805][ T330] really_probe+0x207/0xad0
> > [ 252.141191][ T330] ? device_driver_attach+0x120/0x120
> > [ 252.146428][ T330] driver_probe_device+0x1f1/0x370
> > [ 252.151424][ T330] device_driver_attach+0xe5/0x120
> > [ 252.156399][ T330] __driver_attach+0xf0/0x260
> > [ 252.160953][ T330] bus_for_each_dev+0x117/0x1a0
> > [ 252.165669][ T330] ? subsys_dev_iter_exit+0x10/0x10
> > [ 252.170731][ T330] bus_add_driver+0x399/0x560
> > [ 252.175289][ T330] driver_register+0x189/0x310
> > [ 252.179919][ T330] ? 0xffffffffc05c1000
> > [ 252.183960][ T330] megasas_init+0x117/0x1000 [megaraid_sas]
> > [ 252.189713][ T330] do_one_initcall+0xf6/0x510
> > [ 252.194267][ T330] ? perf_trace_initcall_level+0x490/0x490
> > [ 252.199940][ T330] ? kasan_unpoison_shadow+0x30/0x40
> > [ 252.205104][ T330] ? __kasan_kmalloc.constprop.11+0xc1/0xd0
> > [ 252.210859][ T330] ? do_init_module+0x49/0x6c0
> > [ 252.215500][ T330] ? kmem_cache_alloc_trace+0x11f/0x1e0
> > [ 252.220925][ T330] ? kasan_unpoison_shadow+0x30/0x40
> > [ 252.226068][ T330] do_init_module+0x1ed/0x6c0
> > [ 252.230608][ T330] load_module+0x4a59/0x5d20
> > [ 252.235081][ T330] ? layout_and_allocate+0x2770/0x2770
> > [ 252.240404][ T330] ? __vmalloc_node+0x8d/0x100
> > [ 252.245046][ T330] ? kernel_read_file+0x485/0x5a0
> > [ 252.249934][ T330] ? kernel_read_file+0x305/0x5a0
> > [ 252.254839][ T330] ? __x64_sys_fsconfig+0x970/0x970
> > [ 252.259903][ T330] ? __do_sys_finit_module+0xff/0x180
> > [ 252.265153][ T330] __do_sys_finit_module+0xff/0x180
> > [ 252.270216][ T330] ? __do_sys_init_module+0x1d0/0x1d0
> > [ 252.275465][ T330] ? __fget_files+0x1c3/0x2e0
> > [ 252.280010][ T330] do_syscall_64+0x33/0x40
> > [ 252.284304][ T330] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> > [ 252.290054][ T330] RIP: 0033:0x7fbb3e2fa78d
> > [ 252.294348][ T330] Code: Unable to access opcode bytes at RIP
> > 0x7fbb3e2fa763.
> > [ 252.301584][ T330] RSP: 002b:00007ffe572e8d18 EFLAGS: 00000246 ORIG_RAX:
> > 0000000000000139
> > [ 252.309855][ T330] RAX: ffffffffffffffda RBX: 000055c7795d90f0 RCX:
> > 00007fbb3e2fa78d
> > [ 252.317703][ T330] RDX: 0000000000000000 RSI: 00007fbb3ee6c82d RDI:
> > 0000000000000006
> > [ 252.325553][ T330] RBP: 00007fbb3ee6c82d R08: 0000000000000000 R09:
> > 00007ffe572e8e40
> > [ 252.333402][ T330] R10: 0000000000000006 R11: 0000000000000246 R12:
> > 0000000000000000
> > [ 252.341257][ T330] R13: 000055c7795930e0 R14: 0000000000020000 R15:
> > 0000000000000000
> > [ 252.349117][ T330]
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