linux-kernel - sched: WARNING: at include/linux/cpumask.h:108 select_fallback

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 29 Mar 2012 22:32:16 +0200
From:	Sasha Levin <levinsasha928@...il.com>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>
Cc:	"linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
	Dave Jones <davej@...hat.com>
Subject: sched: WARNING: at include/linux/cpumask.h:108 select_fallback_rq+0x241/0x280()

(and now with lkml)

Hi all,

I got the following spew using trinity in a kvm tools guest on the
latest linux-next kernel.

This is the result of trying to offline CPU1. I'm not sure how to
reproduce it easily besides putting some pressure on the system and
shutting down CPUs until it happens.

[  317.238839] Cannot set affinity for irq 0
[  317.238839] ------------[ cut here ]------------
[  317.238839] WARNING: at include/linux/cpumask.h:108
select_fallback_rq+0x241/0x280()
[  317.238839] Pid: 13, comm: migration/1 Not tainted
3.3.0-next-20120329-sasha #4
[  317.238839] Call Trace:
[  317.238839]  [<ffffffff810b26b5>] warn_slowpath_common+0x75/0xb0
[  317.238839]  [<ffffffff810b2705>] warn_slowpath_null+0x15/0x20
[  317.238839]  [<ffffffff810e5991>] select_fallback_rq+0x241/0x280
[  317.238839]  [<ffffffff810f1a40>] ? dequeue_task_fair+0x100/0x100
[  317.238839]  [<ffffffff810f1a40>] ? dequeue_task_fair+0x100/0x100
[  317.238839]  [<ffffffff810ecd20>] migrate_tasks+0x80/0xf0
[  317.238839]  [<ffffffff826fe03a>] ? migration_call+0xae/0x16b
[  317.238839]  [<ffffffff826fe073>] migration_call+0xe7/0x16b
[  317.238839]  [<ffffffff810ddebf>] notifier_call_chain+0x5f/0x150
[  317.238839]  [<ffffffff810ddfb9>] __raw_notifier_call_chain+0x9/0x10
[  317.238839]  [<ffffffff810b489b>] __cpu_notify+0x1b/0x30
[  317.238839]  [<ffffffff826c3fbd>] take_cpu_down+0x2d/0x40
[  317.238839]  [<ffffffff811357fa>] stop_machine_cpu_stop+0xda/0x1a0
[  317.238839]  [<ffffffff81135720>] ? queue_stop_cpus_work+0x190/0x190
[  317.238839]  [<ffffffff811352ae>] cpu_stopper_thread+0xee/0x200
[  317.238839]  [<ffffffff82705c1a>] ? __schedule+0x49a/0x860
[  317.238839]  [<ffffffff811351c0>] ? res_counter_init+0x50/0x50
[  317.238839]  [<ffffffff810d715e>] kthread+0xbe/0xd0
[  317.238839]  [<ffffffff82709e74>] kernel_thread_helper+0x4/0x10
[  317.238839]  [<ffffffff810e3ee0>] ? finish_task_switch+0x80/0x110
[  317.238839]  [<ffffffff82708174>] ? retint_restore_args+0x13/0x13
[  317.238839]  [<ffffffff810d70a0>] ? __init_kthread_worker+0x70/0x70
[  317.238839]  [<ffffffff82709e70>] ? gs_change+0x13/0x13
[  317.238839] ---[ end trace 79079cf527253aab ]---
[  317.250645] [sched_delayed] process 2267 (trinity) no longer affine to cpu1
[  317.323711] CPU 1 is now offline
[  317.591059] [sched_delayed] process 1956 (trinity) no longer affine to cpu1
[  317.812110] [sched_delayed] process 2004 (trinity) no longer affine to cpu1
[  318.401016] [sched_delayed] process 2228 (trinity) no longer affine to cpu1
[  318.581015] [sched_delayed] process 2099 (trinity) no longer affine to cpu1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/