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SubjectRe: Filesystem lockup with CONFIG_PREEMPT_RT
On Fri, Jun 27, 2014 at 7:24 AM, Thomas Gleixner <tglx@linutronix.de> wrote:
> Completely untested patch below.

By chance, I found this in my boot logs. I'll do some more startup
testing tomorrow.

Jun 30 19:54:40 vpc5 kernel: [ 0.670955] ------------[ cut here ]------------
Jun 30 19:54:40 vpc5 kernel: [ 0.670962] WARNING: CPU: 0 PID: 4 at
kernel/workqueue.c:1604 worker_enter_idle+0x65/0x16b()
Jun 30 19:54:40 vpc5 kernel: [ 0.670970] Modules linked in:
Jun 30 19:54:40 vpc5 kernel: [ 0.670973] CPU: 0 PID: 4 Comm:
kworker/0:0 Not tainted 3.14.3-rt4abs+ #8
Jun 30 19:54:40 vpc5 kernel: [ 0.670974] Hardware name: CompuLab
Intense-PC/Intense-PC, BIOS CR_2.2.0.377 X64 04/10/2013
Jun 30 19:54:40 vpc5 kernel: [ 0.670983] 0000000000000009
ffff88040ce75de8 ffffffff81510faf 0000000000000002
Jun 30 19:54:40 vpc5 kernel: [ 0.670985] 0000000000000000
ffff88040ce75e28 ffffffff81042085 0000000000000001
Jun 30 19:54:40 vpc5 kernel: [ 0.670987] ffffffff81057a60
ffff88042d406900 ffff88042da63fc0 ffff88042da64030
Jun 30 19:54:40 vpc5 kernel: [ 0.670988] Call Trace:
Jun 30 19:54:40 vpc5 kernel: [ 0.670995] [<ffffffff81510faf>]
dump_stack+0x4f/0x7c
Jun 30 19:54:40 vpc5 kernel: [ 0.670999] [<ffffffff81042085>]
warn_slowpath_common+0x81/0x9c
Jun 30 19:54:40 vpc5 kernel: [ 0.671002] [<ffffffff81057a60>] ?
worker_enter_idle+0x65/0x16b
Jun 30 19:54:40 vpc5 kernel: [ 0.671005] [<ffffffff810420ba>]
warn_slowpath_null+0x1a/0x1c
Jun 30 19:54:40 vpc5 kernel: [ 0.671007] [<ffffffff81057a60>]
worker_enter_idle+0x65/0x16b
Jun 30 19:54:40 vpc5 kernel: [ 0.671010] [<ffffffff8105a0a9>]
worker_thread+0x1b3/0x22b
Jun 30 19:54:40 vpc5 kernel: [ 0.671013] [<ffffffff81059ef6>] ?
rescuer_thread+0x293/0x293
Jun 30 19:54:40 vpc5 kernel: [ 0.671015] [<ffffffff81059ef6>] ?
rescuer_thread+0x293/0x293
Jun 30 19:54:40 vpc5 kernel: [ 0.671018] [<ffffffff8105f7ab>]
kthread+0xdc/0xe4
Jun 30 19:54:40 vpc5 kernel: [ 0.671022] [<ffffffff8105f6cf>] ?
flush_kthread_worker+0xe1/0xe1
Jun 30 19:54:40 vpc5 kernel: [ 0.671025] [<ffffffff8151586c>]
ret_from_fork+0x7c/0xb0
Jun 30 19:54:40 vpc5 kernel: [ 0.671027] [<ffffffff8105f6cf>] ?
flush_kthread_worker+0xe1/0xe1
Jun 30 19:54:40 vpc5 kernel: [ 0.671029] ---[ end trace 0000000000000001 ]---


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