Messages in this thread |  | | | Subject | mmotm 2010-08-11 - RCU whinge during very early boot | | From | Valdis.Kletnieks@vt ... | | Date | Thu, 12 Aug 2010 12:18:07 -0400 |
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On Wed, 11 Aug 2010 16:10:49 PDT, akpm@linux-foundation.org said: > The mm-of-the-moment snapshot 2010-08-11-16-10 has been uploaded to > > http://userweb.kernel.org/~akpm/mmotm/
Throws a RCU complaint. Hopefully somebody on the cc: list knows what it is about...
[ 0.026136] CPU0: Intel(R) Core(TM)2 Duo CPU P8700 @ 2.53GHz stepping 0a [ 0.028399] NMI watchdog enabled, takes one hw-pmu counter. [ 0.030019] lockdep: fixing up alternatives. [ 0.031178] [ 0.031179] =================================================== [ 0.031182] [ INFO: suspicious rcu_dereference_check() usage. ] [ 0.031184] --------------------------------------------------- [ 0.031187] kernel/sched.c:618 invoked rcu_dereference_check() without protection! [ 0.031189] [ 0.031189] other info that might help us debug this: [ 0.031190] [ 0.031192] [ 0.031193] rcu_scheduler_active = 1, debug_locks = 1 [ 0.031195] 3 locks held by kworker/0:0/4: [ 0.031197] #0: (events){+.+.+.}, at: [<ffffffff810504ca>] process_one_work+0x1b6/0x37d [ 0.031210] #1: ((&c_idle.work)){+.+.+.}, at: [<ffffffff810504ca>] process_one_work+0x1b6/0x37d [ 0.031217] #2: (&rq->lock){-.-...}, at: [<ffffffff81b5f9b8>] init_idle+0x2b/0x114 [ 0.031225] [ 0.031226] stack backtrace: [ 0.031229] Pid: 4, comm: kworker/0:0 Not tainted 2.6.35-mmotm0811 #1 [ 0.031232] Call Trace: [ 0.031237] [<ffffffff810661eb>] lockdep_rcu_dereference+0x9d/0xa5 [ 0.031242] [<ffffffff8102b751>] task_group+0x7b/0x8a [ 0.031246] [<ffffffff81b5f9b8>] ? init_idle+0x2b/0x114 [ 0.031250] [<ffffffff8102b775>] set_task_rq+0x15/0x6e [ 0.031253] [<ffffffff81b5fa5e>] init_idle+0xd1/0x114 [ 0.031257] [<ffffffff81b5fb44>] fork_idle+0x8e/0x9d [ 0.031261] [<ffffffff81b5de6f>] do_fork_idle+0x17/0x28 [ 0.031265] [<ffffffff8105052b>] process_one_work+0x217/0x37d [ 0.031269] [<ffffffff810504ca>] ? process_one_work+0x1b6/0x37d [ 0.031273] [<ffffffff81b5de58>] ? do_fork_idle+0x0/0x28 [ 0.031277] [<ffffffff81051775>] worker_thread+0x17e/0x251 [ 0.031281] [<ffffffff810515f7>] ? worker_thread+0x0/0x251 [ 0.031285] [<ffffffff8105544a>] kthread+0x7d/0x85 [ 0.031290] [<ffffffff81003554>] kernel_thread_helper+0x4/0x10 [ 0.031295] [<ffffffff81558d80>] ? restore_args+0x0/0x30 [ 0.031299] [<ffffffff810553cd>] ? kthread+0x0/0x85 [ 0.031303] [<ffffffff81003550>] ? kernel_thread_helper+0x0/0x10 [ 0.031333] Booting Node 0, Processors #1 Ok. [ 0.103111] NMI watchdog enabled, takes one hw-pmu counter. [ 0.104013] Brought up 2 CPUs [unhandled content-type:application/pgp-signature] |  |