Messages in this thread | | | Date | Thu, 18 Oct 2012 07:53:08 +0200 | From | Jens Axboe <> | Subject | Re: MAX_LOCKDEP_ENTRIES too low (called from ioc_release_fn) |
| |
On 2012-10-18 03:53, Dave Jones wrote: > Triggered while fuzz testing.. > > > BUG: MAX_LOCKDEP_ENTRIES too low! > turning off the locking correctness validator. > Pid: 22788, comm: kworker/2:1 Not tainted 3.7.0-rc1+ #34 > Call Trace: > [<ffffffff810decdd>] add_lock_to_list.isra.29.constprop.45+0xdd/0xf0 > [<ffffffff810e2871>] __lock_acquire+0x1121/0x1ba0 > [<ffffffff810e3a12>] lock_acquire+0xa2/0x220 > [<ffffffff8117bad2>] ? free_one_page+0x32/0x450 > [<ffffffff816c5a59>] ? sub_preempt_count+0x79/0xd0 > [<ffffffff816c0800>] _raw_spin_lock+0x40/0x80 > [<ffffffff8117bad2>] ? free_one_page+0x32/0x450 > [<ffffffff8117bad2>] free_one_page+0x32/0x450 > [<ffffffff8117bf41>] ? __free_pages_ok.part.58+0x51/0x110 > [<ffffffff8117bf9c>] __free_pages_ok.part.58+0xac/0x110 > [<ffffffff8117cd73>] __free_pages+0x73/0x90 > [<ffffffff811cb4f3>] __free_slab+0xd3/0x1b0 > [<ffffffff811cb609>] discard_slab+0x39/0x50 > [<ffffffff816b77db>] __slab_free+0x378/0x3a3 > [<ffffffff81341289>] ? ioc_release_fn+0x99/0xe0 > [<ffffffff81341289>] ? ioc_release_fn+0x99/0xe0 > [<ffffffff811cd4e2>] kmem_cache_free+0x2f2/0x320 > [<ffffffff816c5a59>] ? sub_preempt_count+0x79/0xd0 > [<ffffffff81341289>] ioc_release_fn+0x99/0xe0 > [<ffffffff81095a37>] process_one_work+0x207/0x780 > [<ffffffff810959c7>] ? process_one_work+0x197/0x780 > [<ffffffff813411f0>] ? get_io_context+0x20/0x20 > [<ffffffff8109638e>] worker_thread+0x15e/0x440 > [<ffffffff81096230>] ? rescuer_thread+0x240/0x240 > [<ffffffff8109d0cd>] kthread+0xed/0x100 > [<ffffffff810de02e>] ? put_lock_stats.isra.25+0xe/0x40 > [<ffffffff8109cfe0>] ? kthread_create_on_node+0x160/0x160 > [<ffffffff816c9dac>] ret_from_fork+0x7c/0xb0 > [<ffffffff8109cfe0>] ? kthread_create_on_node+0x160/0x160
Not sure why you are CC'ing a call site, rather than the maintainers of the code. Just looks like lockdep is using too small a static value. Though it is pretty darn large...
-- Jens Axboe
| |