From: Dave Jones <davej@redhat.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: process 'stuck' at exit.
Date: Tue, 10 Dec 2013 10:47:24 -0500 [thread overview]
Message-ID: <20131210154724.GA30020@redhat.com> (raw)
I woke up to find my fuzzer in a curious state.
1121 pts/5 SN+ 0:00 | \_ ../trinity -q -l off -N 999999 -C 42
1130 pts/5 SN+ 0:01 | \_ ../trinity -q -l off -N 999999 -C 42
1131 pts/5 SN+ 0:17 | \_ ../trinity -q -l off -N 999999 -C 42
10818 ? RNs 21115152:53 | \_ ../trinity -q -l off -N 999999 -C 42
(ignore the first 3 pids, they're waiting on 10818, which is the interesting one)
It's completed its run of 999999 syscalls, and looking at tmux, it tried to exit.
/proc/10818/stack just shows
[<ffffffffffffffff>] 0xffffffffffffffff
Top reports a core is spinning in the kernel 100%, so I ran perf top -a
and saw..
8.63% [kernel] [k] trace_hardirqs_off_caller
7.68% [kernel] [k] __lock_acquire
5.35% [kernel] [k] gup_huge_pmd
5.31% [kernel] [k] put_compound_page
4.93% [kernel] [k] gup_pud_range
4.76% [kernel] [k] trace_hardirqs_on_caller
4.58% [kernel] [k] get_user_pages_fast
4.00% [kernel] [k] debug_smp_processor_id
4.00% [kernel] [k] lock_is_held
3.73% [kernel] [k] lock_acquired
3.67% [kernel] [k] lock_release
sysrq-t shows..
trinity-child27 R running task 5520 10818 1131 0x00080004
0000000000000000 ffff8801b0ef4170 000000000000032c ffff8801b609e108
0000000000000000 ffff880160d21c30 ffffffff810ad895 ffffffff817587a0
ffff8801b0ef4170 ffff8801b609e0a8 ffff8801b609e000 ffff880160d21d50
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
any ideas ?
Dave
next reply other threads:[~2013-12-10 15:47 UTC|newest]
Thread overview: 114+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-10 15:47 Dave Jones [this message]
2013-12-10 18:40 ` process 'stuck' at exit 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
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