From: Sasha Levin <sasha.levin@oracle.com>
To: Peter Zijlstra <peterz@infradead.org>,
paulus@samba.org, Ingo Molnar <mingo@kernel.org>,
acme@ghostprotocols.net
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: perf: warning in perf_event_delayed_put
Date: Thu, 03 Apr 2014 10:19:18 -0400 [thread overview]
Message-ID: <533D6DE6.5080905@oracle.com> (raw)
Hi all,
While fuzzing with trinity inside a KVM tools guest running the latest
-next kernel I've stumbled on the following warning, which I happen
to hit quite often:
[ 357.437823] WARNING: CPU: 19 PID: 28 at kernel/events/core.c:7554 perf_event_delayed_put+0x64/0x80()
[child196:9542] Chose rand_syscalls.[ 357.441036] Modules linked in:
[ 357.442041] CPU: 19 PID: 28 Comm: rcuop/16 Not tainted 3.14.0-next-20140402-sasha-00013-g0cfaf7e-dirty #367
[ 357.445082] 0000000000000009 ffff88003e37fcd8 ffffffff944beb13 0000000000000003
[ 357.447245] 0000000000000000 ffff88003e37fd18
ffffffff9115a37c 0000000000000000
[ 357.449747] ffff880464e63000 ffff880464e63000 ffff880464e64a80 ffffffff95e8d170
[ 357.453659] Call Trace:
[ 357.454401] dump_stack (lib/dump_stack.c:52)
[ 357.455735] warn_slowpath_common (kernel/panic.c:418)
[ 357.457395] warn_slowpath_null (kernel/panic.c:453)
[ 357.458618] perf_event_delayed_put (kernel/events/core.c:7554 (discriminator 3))
[ 357.461861] delayed_put_task_struct (kernel/exit.c:165 include/linux/jump_label.h:105 include/trace/events/sched.h:207 kernel/exit.c:166)
[ 357.463530] ? kill_orphaned_pgrp (kernel/exit.c:162)
[ 357.465035] ? kill_orphaned_pgrp (kernel/exit.c:162)
[ 357.466981] rcu_nocb_kthread (include/linux/rcupdate.h:324 kernel/rcu/rcu.h:115 kernel/rcu/tree_plugin.h:2338)
[ 357.469129] ? rcu_nocb_kthread (kernel/rcu/rcu.h:84 kernel/rcu/tree_plugin.h:2336)
[ 357.471961] ? preempt_count_sub (kernel/sched/core.c:2527)
[ 357.473873] ? bit_waitqueue (kernel/sched/wait.c:291)
[ 357.475647] ? rcu_cpu_notify (kernel/rcu/tree_plugin.h:2276)
[ 357.477478] kthread (kernel/kthread.c:219)
[ 357.479168] ? kthread_create_on_node (kernel/kthread.c:185)
[ 357.482077] ret_from_fork (arch/x86/kernel/entry_64.S:555)
[ 357.483628] ? kthread_create_on_node (kernel/kthread.c:185)
Thanks,
Sasha
reply other threads:[~2014-04-03 14:19 UTC|newest]
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