Tejun Heo <t...@kernel.org> writes:
> From d3251859168b0b12841e1b90d6d768ab478dc23d Mon Sep 17 00:00:00 2001
> From: Tejun Heo <t...@kernel.org>
> Date: Fri, 10 May 2013 11:10:17 -0700
>
> df2d5ae499 ("workqueue: map an unbound workqueues to multiple per-node
> pool_workqueues") made unbound workqueues to map to multiple per-node
> pool_workqueues and accordingly updated workqueue_contested() so that,
> for unbound workqueues, it maps the specified @cpu to the NUMA node
> number to obtain the matching pool_workqueue to query the congested
> state.
>
> Before this change, workqueue_congested() ignored @cpu for unbound
> workqueues as there was only one pool_workqueue and some users
> (fscache) called it with WORK_CPU_UNBOUND. After the commit, this
> causes the following oops as WORK_CPU_UNBOUND gets translated to
> garbage by cpu_to_node().
I probably also noticed this problem with 3.10.0-rc1-00087-g674825d when
I invoked init 0 (see attached oops). I applied your patch and after
that the problem has gone.
Dirk
------------------------------------------------------------------------
May 14 11:08:20 karga kernel: BUG: unable to handle kernel paging request at
ffff8803982ea070
May 14 11:08:20 karga kernel: IP: [<ffffffff8106bc62>]
workqueue_congested+0x34/0x44
May 14 11:08:20 karga kernel: PGD 1ae6067 PUD 0
May 14 11:08:20 karga kernel: Oops: 0000 [#1] SMP
May 14 11:08:20 karga kernel: Modules linked in: bridge stp llc
snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_pcm snd_page_alloc
snd_timer snd k8temp i2c_viapro atl1 mii floppy asus_atk0110
May 14 11:08:20 karga kernel: CPU: 1 PID: 2799 Comm: cachefilesd Tainted: G
W 3.10.0-rc1-00087-g674825d #1
May 14 11:08:20 karga kernel: Hardware name: System manufacturer System Product
Name/M2V, BIOS 1803 05/11/2007
May 14 11:08:20 karga kernel: task: ffff88007c794780 ti: ffff88007c2be000
task.ti: ffff88007c2be000
May 14 11:08:20 karga kernel: RIP: 0010:[<ffffffff8106bc62>]
[<ffffffff8106bc62>] workqueue_congested+0x34/0x44
May 14 11:08:20 karga kernel: RSP: 0018:ffff88007c2bfd90 EFLAGS: 00010206
May 14 11:08:20 karga kernel: RAX: 00000000636f6c8e RBX: ffff88007c31c000 RCX:
ffffffff815ab8a0
May 14 11:08:20 karga kernel: RDX: ffffffff8178a61d RSI: ffff88007cb33c00 RDI:
0000000000000020
May 14 11:08:20 karga kernel: RBP: ffff88007fd0f100 R08: ffffffff815ab8a0 R09:
0000000000000400
May 14 11:08:20 karga kernel: R10: ffffffff81a714c0 R11: ffffffff81a714c0 R12:
ffff88007c31c000
May 14 11:08:20 karga kernel: R13: ffff88007c3df298 R14: ffff88007c2bfdc0 R15:
ffff88007c9a02d0
May 14 11:08:20 karga kernel: FS: 00007f5f36536700(0000)
GS:ffff88007fd00000(0000) knlGS:0000000000000000
May 14 11:08:20 karga kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
May 14 11:08:20 karga kernel: CR2: ffff8803982ea070 CR3: 000000007b570000 CR4:
00000000000007e0
May 14 11:08:20 karga kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
May 14 11:08:20 karga kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
May 14 11:08:20 karga kernel: Stack:
May 14 11:08:20 karga kernel: ffffffff81164dd1 ffff88007c3df200
ffff88007c3df200 ffff88007c31c048
May 14 11:08:20 karga kernel: ffffffff81163cb4 ffff88007c9a02d0
ffff88007c31c048 ffff88007c31c048
May 14 11:08:20 karga kernel: ffffffff00000010 ffff88007c2bfe28
ffff88007c2bfde8 0000000000000296
May 14 11:08:20 karga kernel: Call Trace:
May 14 11:08:20 karga kernel: [<ffffffff81164dd1>] ?
fscache_enqueue_object+0x28/0x7f
May 14 11:08:20 karga kernel: [<ffffffff81163cb4>] ?
fscache_withdraw_cache+0x101/0x264
May 14 11:08:20 karga kernel: [<ffffffff8129c86e>] ?
cachefiles_daemon_unbind+0x29/0x67
May 14 11:08:20 karga kernel: [<ffffffff8129d19f>] ?
cachefiles_daemon_release+0x40/0x97
May 14 11:08:20 karga kernel: [<ffffffff811115e8>] ? __fput+0xe5/0x1ce
May 14 11:08:20 karga kernel: [<ffffffff81070b7a>] ? task_work_run+0x73/0x89
May 14 11:08:20 karga kernel: [<ffffffff8105bbbf>] ? do_exit+0x3b1/0x8f9
May 14 11:08:20 karga kernel: [<ffffffff81126783>] ? mntput_no_expire+0x13/0x11f
May 14 11:08:20 karga kernel: [<ffffffff8105c25c>] ? do_group_exit+0x66/0x98
May 14 11:08:20 karga kernel: [<ffffffff8105c29d>] ? SyS_exit_group+0xf/0xf
May 14 11:08:20 karga kernel: [<ffffffff8158fbd2>] ?
system_call_fastpath+0x16/0x1b
May 14 11:08:20 karga kernel: Code: ff 75 11 48 8b 86 08 01 00 00 48 03 04 fd
90 1d 90 81 eb 1b 48 8b 14 fd 90 1d 90 81 48 c7 c0 90 e9 00 00 48 63 04 10 48
83 c0 22 <48> 8b 04 c6 48 8d 50 60 48 39 50 60 0f 95 c0 c3 53 48 89 fb 48
May 14 11:08:20 karga kernel: RIP [<ffffffff8106bc62>]
workqueue_congested+0x34/0x44
May 14 11:08:20 karga kernel: RSP <ffff88007c2bfd90>
May 14 11:08:20 karga kernel: CR2: ffff8803982ea070
May 14 11:08:20 karga kernel: ---[ end trace df995ad9fe99c245 ]---
May 14 11:08:20 karga kernel: Fixing recursive fault but reboot is needed!
May 14 11:08:25 karga /etc/init.d/cachefilesd[3311]: start-stop-daemon: 1
process refused to stop
May 14 11:08:25 karga /etc/init.d/cachefilesd[3303]: ERROR: cachefilesd failed
to stop
May 14 11:08:25 karga bluetoothd[2779]: Terminating
May 14 11:08:25 karga bluetoothd[2779]: Stopping SDP server
May 14 11:08:25 karga bluetoothd[2779]: Exit
May 14 11:08:26 karga sshd[2688]: Received signal 15; terminating.
May 14 11:08:26 karga kernel: device eth0 left promiscuous mode
May 14 11:08:26 karga kernel: br0: port 1(eth0) entered disabled state
May 14 11:09:20 karga kernel: INFO: rcu_sched self-detected stall on CPU { 0}
(t=15000 jiffies g=491 c=490 q=4827)
May 14 11:09:20 karga kernel: CPU: 0 PID: 1291 Comm: kworker/u4:6 Tainted: G
D W 3.10.0-rc1-00087-g674825d #1
May 14 11:09:20 karga kernel: Hardware name: System manufacturer System Product
Name/M2V, BIOS 1803 05/11/2007
May 14 11:09:20 karga kernel: Workqueue: fscache_object fscache_object_work_func
May 14 11:09:20 karga kernel: ffffffff81585e4f 0000000000000025
ffffffff810b68ea 0000000000000001
May 14 11:09:20 karga kernel: 00000000000012db 0000000000000000
0000000000000000 ffff88007c954780
May 14 11:09:20 karga kernel: ffff88007c954780 0000000000000000
0000000000000000 ffff88007fc0d220
May 14 11:09:20 karga kernel: Call Trace:
May 14 11:09:20 karga kernel: <IRQ> [<ffffffff81585e4f>] ? dump_stack+0xd/0x17
May 14 11:09:20 karga kernel: [<ffffffff810b68ea>] ?
rcu_check_callbacks+0x1cb/0x5b2
May 14 11:09:20 karga kernel: [<ffffffff81093c7e>] ?
tick_sched_do_timer+0x25/0x25
May 14 11:09:20 karga kernel: [<ffffffff81063fec>] ?
update_process_times+0x31/0x5c
May 14 11:09:20 karga kernel: [<ffffffff810939e4>] ? tick_sched_handle+0x33/0x3e
May 14 11:09:20 karga kernel: [<ffffffff81093cae>] ? tick_sched_timer+0x30/0x4c
May 14 11:09:20 karga kernel: [<ffffffff810755e3>] ? __run_hrtimer+0xc7/0x18c
May 14 11:09:20 karga kernel: [<ffffffff81075dd6>] ?
hrtimer_interrupt+0xe5/0x1cd
May 14 11:09:20 karga kernel: [<ffffffff81049b34>] ?
smp_apic_timer_interrupt+0x7e/0x91
May 14 11:09:20 karga kernel: [<ffffffff8159078a>] ?
apic_timer_interrupt+0x6a/0x70
May 14 11:09:20 karga kernel: <EOI> [<ffffffff815897fe>] ?
_raw_spin_lock+0x13/0x18
May 14 11:09:20 karga kernel: [<ffffffff81165733>] ?
fscache_object_work_func+0x76c/0x7c5
May 14 11:09:20 karga kernel: [<ffffffff8106e2d4>] ?
process_one_work+0x1eb/0x355
May 14 11:09:20 karga kernel: [<ffffffff8106e87a>] ? worker_thread+0x1c7/0x2bc
May 14 11:09:20 karga kernel: [<ffffffff8106e6b3>] ? rescuer_thread+0x250/0x250
May 14 11:09:20 karga kernel: [<ffffffff81072f42>] ? kthread+0xad/0xb5
May 14 11:09:20 karga kernel: [<ffffffff81072e95>] ?
kthread_freezable_should_stop+0x40/0x40
May 14 11:09:20 karga kernel: [<ffffffff8158fb2c>] ? ret_from_fork+0x7c/0xb0
May 14 11:09:20 karga kernel: [<ffffffff81072e95>] ?
kthread_freezable_should_stop+0x40/0x40
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