linux-kernel - Re: [PATCH tip/core/rcu 0/21] v6 add lockdep-based diagnostics to rcu

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Date:	Thu, 25 Feb 2010 13:04:44 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	linux-kernel@...r.kernel.org, laijs@...fujitsu.com,
	dipankar@...ibm.com, akpm@...ux-foundation.org,
	mathieu.desnoyers@...ymtl.ca, josh@...htriplett.org,
	dvhltc@...ibm.com, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, Valdis.Kletnieks@...edu,
	dhowells@...hat.com
Subject: Re: [PATCH tip/core/rcu 0/21] v6 add lockdep-based diagnostics to
 rcu_dereference()


another, different warning is:

PM: Adding info for No Bus:vcsa6
------------[ cut here ]------------
WARNING: at kernel/softirq.c:143 local_bh_enable_ip+0xba/0xf0()
Hardware name: System Product Name
Modules linked in:
Pid: 0, comm: swapper Not tainted 2.6.33-tip-00730-gacec70d-dirty #18737
Call Trace:
 [<ffffffff8104e0eb>] warn_slowpath_common+0x7b/0xc0
 [<ffffffff8166cd60>] ? __dst_free+0x60/0xd0
 [<ffffffff8104e144>] warn_slowpath_null+0x14/0x20
 [<ffffffff81055c7a>] local_bh_enable_ip+0xba/0xf0
 [<ffffffff817c16d9>] _raw_spin_unlock_bh+0x19/0x20
 [<ffffffff8166cd60>] __dst_free+0x60/0xd0
 [<ffffffff8169de14>] dst_rcu_free+0x34/0x40
 [<ffffffff8109c80d>] rcu_do_batch+0xcd/0x290
 [<ffffffff8109ca3e>] __rcu_process_callbacks+0x6e/0xe0
 [<ffffffff8109cbca>] rcu_needs_cpu+0x11a/0x170
 [<ffffffff8107c14e>] tick_nohz_stop_sched_tick+0x15e/0x440
 [<ffffffff81001dc9>] cpu_idle+0x79/0x120
 [<ffffffff817bb627>] start_secondary+0xa0/0xa2
---[ end trace 155c62ea9b561096 ]---

Config attached.

	Ingo

View attachment "config" of type "text/plain" (67184 bytes)