From: Dave Jones <davej@redhat.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: MAX_LOCKDEP_ENTRIES too low (called from ioc_release_fn)
Date: Fri, 19 Oct 2012 01:21:36 -0400 [thread overview]
Message-ID: <20121019052136.GA30852@redhat.com> (raw)
In-Reply-To: <507F9944.50505@kernel.dk>
On Thu, Oct 18, 2012 at 07:53:08AM +0200, Jens Axboe wrote:
> 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...
You're right, it's a huge chunk of memory.
It looks like I can trigger this from multiple callsites..
Another different trace below.
Not sure why this suddenly got a lot worse in 3.7
Peter, Ingo ?
Dave
BUG: MAX_LOCKDEP_ENTRIES too low!
turning off the locking correctness validator.
Pid: 22350, comm: trinity-child0 Not tainted 3.7.0-rc1+ #36
Call Trace:
[<ffffffff810decdd>] add_lock_to_list.isra.29.constprop.45+0xdd/0xf0
[<ffffffff810e2871>] __lock_acquire+0x1121/0x1ba0
[<ffffffff810b6f89>] ? local_clock+0x89/0xa0
[<ffffffff811b84a5>] ? __swap_duplicate+0xb5/0x190
[<ffffffff810dea58>] ? trace_hardirqs_off_caller+0x28/0xd0
[<ffffffff810e3a12>] lock_acquire+0xa2/0x220
[<ffffffff811b663d>] ? __add_to_swap_cache+0x6d/0x180
[<ffffffff816c0f79>] ? _raw_spin_lock_irq+0x29/0x90
[<ffffffff816c0fa6>] _raw_spin_lock_irq+0x56/0x90
[<ffffffff811b663d>] ? __add_to_swap_cache+0x6d/0x180
[<ffffffff811b663d>] __add_to_swap_cache+0x6d/0x180
[<ffffffff811b6c45>] read_swap_cache_async+0xb5/0x220
[<ffffffff811b6e4e>] swapin_readahead+0x9e/0xf0
[<ffffffff811a2c86>] handle_pte_fault+0x6d6/0xae0
[<ffffffff816c5ad9>] ? sub_preempt_count+0x79/0xd0
[<ffffffff8136d37e>] ? delay_tsc+0xae/0x120
[<ffffffff8136d268>] ? __const_udelay+0x28/0x30
[<ffffffff811a4919>] handle_mm_fault+0x289/0x350
[<ffffffff816c538e>] __do_page_fault+0x18e/0x530
[<ffffffff810b6f89>] ? local_clock+0x89/0xa0
[<ffffffff816b77e1>] ? __slab_free+0x32e/0x3a3
[<ffffffff8112d2e9>] ? rcu_user_exit+0xc9/0xf0
[<ffffffffa0000020>] ? 0xffffffffa000001f
[<ffffffffa0000020>] ? 0xffffffffa000001f
[<ffffffff816c575b>] do_page_fault+0x2b/0x50
[<ffffffff816c1e38>] page_fault+0x28/0x30
[<ffffffffa0000020>] ? 0xffffffffa000001f
[<ffffffff813885ac>] ? strncpy_from_user+0x6c/0x120
[<ffffffffa0000020>] ? 0xffffffffa000001f
[<ffffffff8120e94f>] setxattr+0x6f/0x1d0
[<ffffffff816c5ad9>] ? sub_preempt_count+0x79/0xd0
[<ffffffff8137e8b5>] ? __percpu_counter_add+0x75/0xc0
[<ffffffff811e92d1>] ? __sb_start_write+0x101/0x1d0
[<ffffffff81209d94>] ? mnt_want_write+0x24/0x50
[<ffffffff81209d94>] ? mnt_want_write+0x24/0x50
[<ffffffff810b0de1>] ? get_parent_ip+0x11/0x50
[<ffffffff816c5ad9>] ? sub_preempt_count+0x79/0xd0
[<ffffffff81209d30>] ? __mnt_want_write+0x60/0xa0
[<ffffffffa0000020>] ? 0xffffffffa000001f
[<ffffffff8120ecd5>] sys_setxattr+0x95/0xb0
[<ffffffff816ca108>] tracesys+0xe1/0xe6
[<ffffffffa0000020>] ? 0xffffffffa000001f
next prev parent reply other threads:[~2012-10-19 5:22 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-18 1:53 MAX_LOCKDEP_ENTRIES too low (called from ioc_release_fn) Dave Jones
2012-10-18 5:53 ` Jens Axboe
2012-10-19 5:21 ` Dave Jones [this message]
2012-10-19 12:49 ` Peter Zijlstra
2012-10-19 19:29 ` Dave Jones
2012-10-23 19:50 ` MAX_LOCKDEP_ENTRIES too low Dave Jones
2012-10-24 20:24 ` pi futex oops in __lock_acquire Dave Jones
2012-10-25 4:44 ` Darren Hart
2012-10-25 11:09 ` Dave Jones
2012-11-20 16:46 ` Dave Jones
2012-11-20 17:27 ` Darren Hart
2012-11-20 23:10 ` Darren Hart
2012-11-21 0:30 ` Darren Hart
2012-11-21 17:37 ` Darren Hart
2012-11-21 17:46 ` Dave Jones
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