From: Dave Jones <davej@redhat.com>
To: Darren Hart <dvhart@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Andrea Arcangeli <aarcange@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: process 'stuck' at exit.
Date: Tue, 10 Dec 2013 16:09:56 -0500 [thread overview]
Message-ID: <20131210210956.GD27373@redhat.com> (raw)
In-Reply-To: <1386709077.3685.73.camel@dvhart-mobl4.amr.corp.intel.com>
On Tue, Dec 10, 2013 at 12:57:57PM -0800, Darren Hart wrote:
> > > Call Trace:
> > > [<ffffffff817587a0>] ? retint_restore_args+0xe/0xe
> > > [<ffffffff8132af0e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
> > > [<ffffffff8100b184>] ? native_sched_clock+0x24/0x80
> > > [<ffffffff8109624f>] ? local_clock+0xf/0x50
> > > [<ffffffff810aa27e>] ? put_lock_stats.isra.28+0xe/0x30
> > > [<ffffffff8103edd0>] ? gup_pud_range+0x170/0x190
> > > [<ffffffff8103f0d5>] ? get_user_pages_fast+0x1a5/0x1c0
> > > [<ffffffff810ad1f5>] ? trace_hardirqs_on_caller+0x115/0x1e0
> > > [<ffffffff810a8a2f>] ? up_read+0x1f/0x40
> > > [<ffffffff8103f0d5>] ? get_user_pages_fast+0x1a5/0x1c0
> > > [<ffffffff8115f76c>] ? put_page+0x3c/0x50
> > > [<ffffffff810dd525>] ? get_futex_key+0xd5/0x2c0
> > > [<ffffffff810df18a>] ? futex_requeue+0xfa/0x9c0
> > > [<ffffffff810e019e>] ? do_futex+0xae/0xc80
> > > [<ffffffff810aa27e>] ? put_lock_stats.isra.28+0xe/0x30
> > > [<ffffffff810aa7de>] ? lock_release_holdtime.part.29+0xee/0x170
> > > [<ffffffff8114f16e>] ? context_tracking_user_exit+0x4e/0x190
> > > [<ffffffff810ad1f5>] ? trace_hardirqs_on_caller+0x115/0x1e0
> > > [<ffffffff810e0de1>] ? SyS_futex+0x71/0x150
> > > [<ffffffff81010a45>] ? syscall_trace_enter+0x145/0x2a0
> > > [<ffffffff81760be4>] ? tracesys+0xdd/0xe2
> > >
>
> Can you get us an idea of the arguments trinity is tossing into
> SYS_futex?
>
> Op code? Would help to know if this was requeue_pi for example.
> Type of memory being used for the uaddr?
As is always the case, the interesting bugs only seem to happen
when I have logging disabled. So other than what I can glean from what's
left in the shm, no idea.
One of the other child processes (which exited already) did do a sys_futex.
the params it passed were..
1cb5000, -1, c57, 1cb5004, ffffffffffd8f420, 90000000091a6311
The result of this syscall was -1
> I see futex_requeue in the stack, which means the opcode is one of:
>
> FUTEX_REQUEUE
> FUTEX_CMP_REQUEUE
> FUTEX_CMP_REQUEUE_PI
>
> FUTEX_REQUEUE has a known issue and was replaced with FUTEX_CMP_REQUEUE,
> for details, test cases, and an analysis see the historic tree:
>
> commit 9b91d73bde9d68800f9e5c338c0cf9d0fe3bc862
> Author: Andrew Morton <akpm@osdl.org>
> Date: 2004-05-31
>
> [PATCH] Add FUTEX_CMP_REQUEUE futex op
>
> Specifically:
> http://listman.redhat.com/archives/phil-list/2004-May/msg00023.html
>
>
> Trinity is going to trigger hangs in futexes just by it's very nature,
> but I believe you have watchdogs in place to kill such malformed tests
> after a timeout?
It should. Though that pid is happily ignoring the SIGKILL's the watchdog
is continuing to send, because it's never getting around to processing the
signals apparently.
Dave
prev parent reply other threads:[~2013-12-10 21:10 UTC|newest]
Thread overview: 114+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-10 15:47 process 'stuck' at exit Dave Jones
2013-12-10 18:40 ` Linus Torvalds
2013-12-10 19:18 ` Thomas Gleixner
2013-12-10 19:55 ` Linus Torvalds
2013-12-10 20:27 ` Dave Jones
2013-12-10 20:34 ` Thomas Gleixner
2013-12-10 20:55 ` Dave Jones
2013-12-10 21:25 ` Darren Hart
2013-12-10 21:28 ` Thomas Gleixner
2013-12-10 21:39 ` Steven Rostedt
2013-12-10 20:33 ` Thomas Gleixner
2013-12-10 20:43 ` Linus Torvalds
2013-12-10 21:17 ` Thomas Gleixner
2013-12-10 20:35 ` Oleg Nesterov
2013-12-10 20:49 ` Dave Jones
2013-12-10 21:06 ` Darren Hart
2013-12-10 21:12 ` Dave Jones
2013-12-10 21:18 ` Linus Torvalds
2013-12-10 21:24 ` Linus Torvalds
2013-12-10 21:32 ` Dave Jones
2013-12-10 21:49 ` Linus Torvalds
2013-12-10 21:56 ` Dave Jones
2013-12-10 21:59 ` Linus Torvalds
2013-12-10 22:07 ` Dave Jones
2013-12-11 12:45 ` Ingo Molnar
2013-12-10 21:34 ` Oleg Nesterov
2013-12-10 21:41 ` Dave Jones
2013-12-10 21:57 ` Linus Torvalds
2013-12-10 22:02 ` Dave Jones
2013-12-10 22:09 ` Oleg Nesterov
2013-12-10 22:19 ` Linus Torvalds
2013-12-10 22:33 ` Linus Torvalds
2013-12-10 22:38 ` Darren Hart
2013-12-10 22:57 ` Thomas Gleixner
2013-12-10 23:05 ` Linus Torvalds
2013-12-10 23:28 ` Thomas Gleixner
2013-12-10 23:31 ` Al Viro
2013-12-11 17:08 ` Oleg Nesterov
2013-12-11 17:18 ` Thomas Gleixner
2013-12-11 17:56 ` Oleg Nesterov
2013-12-11 19:18 ` PATCH? introduce get_compound_page (Was: process 'stuck' at exit) Oleg Nesterov
2013-12-13 15:10 ` Andrea Arcangeli
2013-12-13 16:22 ` Oleg Nesterov
2013-12-13 17:34 ` Andrea Arcangeli
2013-12-16 18:36 ` Oleg Nesterov
2013-12-16 20:19 ` Andrea Arcangeli
2013-12-16 20:46 ` Oleg Nesterov
2013-12-17 16:53 ` Oleg Nesterov
2013-12-17 18:06 ` Andrea Arcangeli
2013-12-18 19:19 ` [PATCH -mm 0/7] (Was: introduce get_compound_page) Oleg Nesterov
2013-12-18 19:19 ` [PATCH -mm 1/7] mm: thp: introduce __put_nontail_page() Oleg Nesterov
2013-12-18 19:19 ` [PATCH -mm 2/7] mm: thp: change __get_page_tail() to use __put_nontail_page() Oleg Nesterov
2013-12-18 19:19 ` [PATCH -mm 3/7] mm: change release_pages() to use put_page() rather than put_compound_page() Oleg Nesterov
2013-12-18 19:19 ` [PATCH -mm 4/7] mm: thp: turn put_compound_page() into __put_page_tail() Oleg Nesterov
2013-12-18 19:36 ` Peter Zijlstra
2013-12-18 19:50 ` Oleg Nesterov
2013-12-18 19:20 ` [PATCH -mm 5/7] mm: thp: reorganize out_put_single code in __put_page_tail() Oleg Nesterov
2013-12-18 19:20 ` [PATCH -mm 6/7] mm: thp: introduce get_lock_thp_head() Oleg Nesterov
2013-12-18 21:37 ` Linus Torvalds
2013-12-19 16:29 ` Oleg Nesterov
2013-12-18 19:20 ` [PATCH -mm 7/7] mm: thp: introduce compound_head_put_tail(), change get_futex_key() to use it Oleg Nesterov
2013-12-18 19:28 ` Peter Zijlstra
2013-12-18 19:40 ` Oleg Nesterov
2013-12-19 19:08 ` [PATCH 0/1] mm: fix the theoretical compound_lock() vs prep_new_page() race Oleg Nesterov
2013-12-19 19:09 ` [PATCH 1/1] " Oleg Nesterov
2013-12-23 11:43 ` Andrea Arcangeli
2014-01-03 19:55 ` [PATCH v2 0/1] " Oleg Nesterov
2014-01-03 19:55 ` [PATCH v2 1/1] " Oleg Nesterov
2014-01-03 21:00 ` Andrew Morton
2014-01-04 16:43 ` Oleg Nesterov
2014-01-08 11:54 ` Mel Gorman
2014-01-08 13:14 ` Mel Gorman
2014-01-08 16:13 ` Oleg Nesterov
2014-01-08 18:02 ` Mel Gorman
2014-01-08 19:04 ` Oleg Nesterov
2014-01-09 11:27 ` Mel Gorman
2014-01-09 14:04 ` Oleg Nesterov
2014-01-09 18:52 ` Andrea Arcangeli
2014-01-09 19:43 ` Oleg Nesterov
2014-01-09 21:36 ` Andrea Arcangeli
2014-01-10 16:12 ` Oleg Nesterov
2014-01-10 16:50 ` Peter Zijlstra
2014-01-10 16:12 ` Mel Gorman
2013-12-20 14:19 ` [PATCH 0/1] " Martin Schwidefsky
2013-12-16 20:19 ` [PATCH 0/2] mm: thp: get_huge_page_tail() cleanups Oleg Nesterov
2013-12-16 20:19 ` [PATCH -mm 1/2] mm: thp: __get_page_tail_foll() can use get_huge_page_tail() Oleg Nesterov
2013-12-16 20:19 ` [PATCH -mm 2/2] mm: thp: turn compound_head() into BUG_ON(!PageTail) in get_huge_page_tail() Oleg Nesterov
2013-12-16 20:27 ` [PATCH 0/2] mm: thp: get_huge_page_tail() cleanups Andrea Arcangeli
2013-12-10 22:42 ` process 'stuck' at exit Thomas Gleixner
2013-12-10 22:48 ` Linus Torvalds
2013-12-10 22:58 ` Darren Hart
2013-12-10 23:01 ` Dave Jones
2013-12-10 23:00 ` Dave Jones
2013-12-11 0:05 ` Steven Rostedt
2013-12-11 0:23 ` Dave Jones
2013-12-11 0:55 ` Dave Jones
2013-12-14 20:17 ` Oleg Nesterov
2013-12-11 4:09 ` Dave Jones
2013-12-12 4:26 ` Dave Jones
2013-12-12 5:29 ` Darren Hart
2013-12-10 22:51 ` Darren Hart
2013-12-10 23:24 ` Al Viro
2013-12-11 16:31 ` Mel Gorman
2013-12-11 16:38 ` Thomas Gleixner
2013-12-11 17:57 ` Mel Gorman
2013-12-12 19:00 ` Andrea Arcangeli
2013-12-12 19:03 ` Linus Torvalds
2013-12-10 22:09 ` Steven Rostedt
2013-12-10 22:16 ` Dave Jones
2013-12-10 22:21 ` Steven Rostedt
2013-12-10 22:27 ` Dave Jones
2013-12-11 1:02 ` Mel Gorman
2013-12-10 20:57 ` Darren Hart
2013-12-10 21:09 ` Dave Jones [this message]
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