From: Dave Jones <davej@redhat.com>
To: Linux Kernel <linux-kernel@vger.kernel.org>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Subject: suspicious RCU usage (perf)
Date: Mon, 26 Aug 2013 10:58:38 -0400 [thread overview]
Message-ID: <20130826145838.GA8377@redhat.com> (raw)
Another day, another rcu backtrace..
This says rc6, but it's pretty darn close to rc7, I think it was running
a build from Friday.
[260431.854524] ===============================
[260431.855485] [ INFO: suspicious RCU usage. ]
[260431.856437] 3.11.0-rc6+ #12 Not tainted
[260431.857377] -------------------------------
[260431.858318] include/linux/rcupdate.h:779 rcu_read_lock() used illegally while idle!
[260431.859278] other info that might help us debug this:
[260431.862144] RCU used illegally from idle CPU!
rcu_scheduler_active = 1, debug_locks = 0
[260431.864990] RCU used illegally from extended quiescent state!
[260431.865949] 1 lock held by trinity-kid3/15917:
[260431.866901] #0: (rcu_read_lock){.+.+..}, at: [<ffffffff81146d50>] __perf_event_overflow+0x100/0x320
[260431.867896] stack backtrace:
[260431.869815] CPU: 0 PID: 15917 Comm: trinity-kid3 Not tainted 3.11.0-rc6+ #12
[260431.871885] 0000000000000000 ffff8801095d3ad0 ffffffff816f9c6f ffff88023ce86950
[260431.872912] ffff8801095d3b00 ffffffff810be6a7 ffff880079695cd0 0000000000000000
[260431.873910] ffff8801095d3c00 0000000000000000 ffff8801095d3b80 ffffffff81146ef4
[260431.874909] Call Trace:
[260431.875883] [<ffffffff816f9c6f>] dump_stack+0x54/0x74
[260431.876869] [<ffffffff810be6a7>] lockdep_rcu_suspicious+0xe7/0x120
[260431.877852] [<ffffffff81146ef4>] __perf_event_overflow+0x2a4/0x320
[260431.878834] [<ffffffff81146d50>] ? __perf_event_overflow+0x100/0x320
[260431.879811] [<ffffffff81146e0c>] ? __perf_event_overflow+0x1bc/0x320
[260431.880784] [<ffffffff8170ce00>] ? ftrace_call+0x5/0x2f
[260431.881758] [<ffffffff81147101>] perf_swevent_overflow+0x51/0xe0
[260431.882728] [<ffffffff811471ef>] perf_swevent_event+0x5f/0x90
[260431.883685] [<ffffffff81147329>] perf_tp_event+0x109/0x4f0
[260431.884637] [<ffffffff81147542>] ? perf_tp_event+0x322/0x4f0
[260431.885586] [<ffffffff811079fb>] ? rcu_eqs_enter_common+0x5b/0x420
[260431.886539] [<ffffffff8107a320>] ? task_work_run+0xe0/0xe0
[260431.887486] [<ffffffff81135910>] perf_ftrace_function_call+0xc0/0xd0
[260431.888417] [<ffffffff81114d37>] ? ftrace_ops_control_func+0xe7/0x110
[260431.889353] [<ffffffff8107a320>] ? task_work_run+0xe0/0xe0
[260431.890281] [<ffffffff811079fb>] ? rcu_eqs_enter_common+0x5b/0x420
[260431.891191] [<ffffffff81114d37>] ftrace_ops_control_func+0xe7/0x110
[260431.892088] [<ffffffff8170ce00>] ftrace_call+0x5/0x2f
[260431.892975] [<ffffffff81114cbb>] ? ftrace_ops_control_func+0x6b/0x110
[260431.893862] [<ffffffff8170ce00>] ? ftrace_call+0x5/0x2f
[260431.894745] [<ffffffff81097def>] ? local_clock+0x3f/0x50
[260431.895631] [<ffffffff8107a325>] ? debug_lockdep_rcu_enabled+0x5/0x40
[260431.896516] [<ffffffff8107a325>] ? debug_lockdep_rcu_enabled+0x5/0x40
[260431.897387] [<ffffffff811079fb>] ? rcu_eqs_enter_common+0x5b/0x420
[260431.898264] [<ffffffff81107e24>] rcu_eqs_enter+0x64/0xa0
[260431.899133] [<ffffffff8110c673>] rcu_user_enter+0x13/0x20
[260431.899999] [<ffffffff8114e67a>] user_enter+0x6a/0xd0
[260431.900859] [<ffffffff81010208>] syscall_trace_leave+0x78/0x150
[260431.901712] [<ffffffff8170d4af>] int_check_syscall_exit_work+0x34/0x3d
next reply other threads:[~2013-08-26 14:58 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-26 14:58 Dave Jones [this message]
2013-08-26 16:29 ` suspicious RCU usage (perf) Paul E. McKenney
2013-08-26 17:30 ` Steven Rostedt
2013-08-26 17:50 ` Dave Jones
2013-08-26 18:18 ` Steven Rostedt
2013-08-26 18:29 ` Dave Jones
2013-08-26 19:03 ` Steven Rostedt
2013-08-27 12:16 ` Peter Zijlstra
2013-08-30 15:49 ` Frederic Weisbecker
2013-08-30 15:52 ` Frederic Weisbecker
2013-08-30 15:59 ` Peter Zijlstra
2013-08-30 16:06 ` Frederic Weisbecker
2013-08-26 19:43 ` David Ahern
2013-08-26 19:49 ` Dave Jones
2013-08-27 13:10 ` Steven Rostedt
2013-08-27 13:58 ` David Ahern
2013-08-27 14:13 ` Dave Jones
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130826145838.GA8377@redhat.com \
--to=davej@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=paulmck@linux.vnet.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.