linux-kernel - Call Trace dump on cpuidle_play

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Message-ID: <20121228031154.GA18436@localhost>
Date:	Fri, 28 Dec 2012 11:11:54 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	"Paul E. McKenney" <paul.mckenney@...aro.org>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Call Trace dump on cpuidle_play_dead()

Hi Paul,

FYI, I got the below call trace dump when rebooting kernel inside KVM:

 * Asking all remaining processes to terminate...       
[  102.397875] Task dump for CPU 1:
[  102.398126] swapper/1       R running      0     0      1 0x00000000
[  102.398645]  810c9ad7 810ef4bb af31848b 00000598 50ce7b76 ffffffff 8e53b380 00000017
[  102.399320]  8e98cd45 00000000 8e537ec0 81d47ccc 8c45ff4c 81716e65 8e537640 8c45ff70
[  102.400078]  00000000 8ee9e400 0000d248 8c45ff44 810c59db 00000000 81d47ccc 0000d248
[  102.400100] Call Trace:
[  102.400100]  [<810c9ad7>] ? sched_clock_cpu+0x247/0x290
[  102.400100]  [<810ef4bb>] ? ktime_get+0xbb/0x1a0
[  102.400100]  [<81716e65>] ? cpuidle_play_dead+0x25/0x170
[  102.400100]  [<810c59db>] ? idle_task_exit+0x10b/0x220
[  102.400100]  [<81045bb4>] ? native_play_dead+0x2c4/0x340
[  102.400100]  [<81013faf>] ? cpu_idle+0x18f/0x220
[  102.400100]  [<818533f3>] ? start_secondary+0x4ca/0x4de

and it's bisected down to

[b637a328bd4f43a0e146d1eef0142b650ba0d644] rcu: Print remote CPU's stacks in stall warnings

Thanks,
Fengguang

View attachment "dmesg-kvm-fat-8822-2012-12-17-09-56-54-3.7.0-00758-g2a74dbb-4" of type "text/plain" (48864 bytes)

View attachment "2a74dbb-bisect.log" of type "text/plain" (84225 bytes)

View attachment ".config-bisect" of type "text/plain" (68481 bytes)