Messages in this thread | | | Date | Sun, 18 Mar 2012 08:54:01 -0700 | From | Tejun Heo <> | Subject | Re: INFO: suspicious RCU usage. on 3.3.0-rc7-next-20120316 |
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On Sun, Mar 18, 2012 at 08:36:26AM -0700, Justin P. Mattock wrote: > with the current linux-next I am seeing this in dmesg..: > > [ 3.643089] isapnp: No Plug & Play device found > [ 3.643690] Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled > [ 3.673061] > [ 3.699307] =============================== > [ 3.725757] [ INFO: suspicious RCU usage. ] > [ 3.752134] 3.3.0-rc7-next-20120316 #1 Not tainted > [ 3.778508] ------------------------------- > [ 3.778510] kernel/cgroup.c:1719 suspicious > rcu_dereference_check() usage! > [ 3.778512] > [ 3.778512] other info that might help us debug this: > [ 3.778513] > [ 3.778515] > [ 3.778515] rcu_scheduler_active = 1, debug_locks = 1 > [ 3.778517] no locks held by swapper/0/1. > [ 3.778517] > [ 3.778518] stack backtrace: > [ 3.778519] Pid: 1, comm: swapper/0 Not tainted > 3.3.0-rc7-next-20120316 #1 > [ 3.778521] Call Trace: > [ 3.778528] [<c158cc21>] ? printk+0x1d/0x1f > [ 3.778534] [<c10a822a>] lockdep_rcu_suspicious+0xca/0x100 > [ 3.778536] [<c10bedea>] cgroup_path+0x17a/0x1c0
Known problem. The following pending patchset should fix the problem.
http://thread.gmane.org/gmane.linux.kernel/1263989
Jens?
Thakns.
-- tejun
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