From: Dave Jones <davej@redhat.com>
To: Linux Kernel <linux-kernel@vger.kernel.org>
Cc: paulmck@linux.vnet.ibm.com, htejun@gmail.com
Subject: rcu_preempt detected stalls.
Date: Mon, 13 Oct 2014 13:35:04 -0400 [thread overview]
Message-ID: <20141013173504.GA27955@redhat.com> (raw)
Today in "rcu stall while fuzzing" news:
INFO: rcu_preempt detected stalls on CPUs/tasks:
Tasks blocked on level-0 rcu_node (CPUs 0-3): P766 P646
Tasks blocked on level-0 rcu_node (CPUs 0-3): P766 P646
(detected by 0, t=6502 jiffies, g=75434, c=75433, q=0)
trinity-c342 R running task 13384 766 32295 0x00000000
ffff880068943d58 0000000000000002 0000000000000002 ffff880193c8c680
00000000001d4100 0000000000000000 ffff880068943fd8 00000000001d4100
ffff88024302c680 ffff880193c8c680 ffff880068943fd8 0000000000000000
Call Trace:
[<ffffffff888368e2>] preempt_schedule_irq+0x52/0xb0
[<ffffffff8883df10>] retint_kernel+0x20/0x30
[<ffffffff880d9424>] ? lock_acquire+0xd4/0x2b0
[<ffffffff8808d495>] ? kill_pid_info+0x5/0x130
[<ffffffff8808d4d5>] kill_pid_info+0x45/0x130
[<ffffffff8808d495>] ? kill_pid_info+0x5/0x130
[<ffffffff8808d6d2>] SYSC_kill+0xf2/0x2f0
[<ffffffff8808d67b>] ? SYSC_kill+0x9b/0x2f0
[<ffffffff8819c2b7>] ? context_tracking_user_exit+0x57/0x280
[<ffffffff880136bd>] ? syscall_trace_enter+0x13d/0x310
[<ffffffff8808fd9e>] SyS_kill+0xe/0x10
[<ffffffff8883d3a4>] tracesys+0xdd/0xe2
trinity-c225 R running task 13448 646 32295 0x00000000
ffff880161ccfb28 0000000000000002 ffff880161ccfe10 ffff88000bf85e00
00000000001d4100 0000000000000003 ffff880161ccffd8 00000000001d4100
ffff880030124680 ffff88000bf85e00 ffff880161ccffd8 0000000000000000
Call Trace:
[<ffffffff888368e2>] preempt_schedule_irq+0x52/0xb0
[<ffffffff8883df10>] retint_kernel+0x20/0x30
[<ffffffff88233d41>] ? __d_lookup_rcu+0xd1/0x1e0
[<ffffffff88233dd6>] ? __d_lookup_rcu+0x166/0x1e0
[<ffffffff88222f9f>] lookup_fast+0x4f/0x3d0
[<ffffffff88224857>] link_path_walk+0x1a7/0x8a0
[<ffffffff88224f95>] ? path_lookupat+0x45/0x7b0
[<ffffffff88224fb7>] path_lookupat+0x67/0x7b0
[<ffffffff880d385d>] ? trace_hardirqs_off+0xd/0x10
[<ffffffff8883dda4>] ? retint_restore_args+0xe/0xe
[<ffffffff8822572b>] filename_lookup+0x2b/0xc0
[<ffffffff88229c77>] user_path_at_empty+0x67/0xc0
[<ffffffff880d3dbe>] ? put_lock_stats.isra.27+0xe/0x30
[<ffffffff880d42a6>] ? lock_release_holdtime.part.28+0xe6/0x160
[<ffffffff880b15ad>] ? get_parent_ip+0xd/0x50
[<ffffffff88229ce1>] user_path_at+0x11/0x20
[<ffffffff8824fac1>] do_utimes+0xd1/0x180
[<ffffffff8824fbef>] SyS_utime+0x7f/0xc0
[<ffffffff8883d345>] ? tracesys+0x7e/0xe2
[<ffffffff8883d3a4>] tracesys+0xdd/0xe2
trinity-c342 R running task 13384 766 32295 0x00000000
ffff880068943d58 0000000000000002 0000000000000002 ffff880193c8c680
00000000001d4100 0000000000000000 ffff880068943fd8 00000000001d4100
ffff88024302c680 ffff880193c8c680 ffff880068943fd8 0000000000000000
Call Trace:
[<ffffffff888368e2>] preempt_schedule_irq+0x52/0xb0
[<ffffffff8883df10>] retint_kernel+0x20/0x30
[<ffffffff880d9424>] ? lock_acquire+0xd4/0x2b0
[<ffffffff8808d495>] ? kill_pid_info+0x5/0x130
[<ffffffff8808d4d5>] kill_pid_info+0x45/0x130
[<ffffffff8808d495>] ? kill_pid_info+0x5/0x130
[<ffffffff8808d6d2>] SYSC_kill+0xf2/0x2f0
[<ffffffff8808d67b>] ? SYSC_kill+0x9b/0x2f0
[<ffffffff8819c2b7>] ? context_tracking_user_exit+0x57/0x280
[<ffffffff880136bd>] ? syscall_trace_enter+0x13d/0x310
[<ffffffff8808fd9e>] SyS_kill+0xe/0x10
[<ffffffff8883d3a4>] tracesys+0xdd/0xe2
trinity-c225 R running task 13448 646 32295 0x00000000
ffff880161ccfb28 0000000000000002 ffff880161ccfe10 ffff88000bf85e00
00000000001d4100 0000000000000003 ffff880161ccffd8 00000000001d4100
ffff880030124680 ffff88000bf85e00 ffff880161ccffd8 0000000000000000
Call Trace:
[<ffffffff888368e2>] preempt_schedule_irq+0x52/0xb0
[<ffffffff8883df10>] retint_kernel+0x20/0x30
[<ffffffff88233d41>] ? __d_lookup_rcu+0xd1/0x1e0
[<ffffffff88233dd6>] ? __d_lookup_rcu+0x166/0x1e0
[<ffffffff88222f9f>] lookup_fast+0x4f/0x3d0
[<ffffffff88224857>] link_path_walk+0x1a7/0x8a0
[<ffffffff88224f95>] ? path_lookupat+0x45/0x7b0
[<ffffffff88224fb7>] path_lookupat+0x67/0x7b0
[<ffffffff880d385d>] ? trace_hardirqs_off+0xd/0x10
[<ffffffff8883dda4>] ? retint_restore_args+0xe/0xe
[<ffffffff8822572b>] filename_lookup+0x2b/0xc0
[<ffffffff88229c77>] user_path_at_empty+0x67/0xc0
[<ffffffff880d3dbe>] ? put_lock_stats.isra.27+0xe/0x30
[<ffffffff880d42a6>] ? lock_release_holdtime.part.28+0xe6/0x160
[<ffffffff880b15ad>] ? get_parent_ip+0xd/0x50
[<ffffffff88229ce1>] user_path_at+0x11/0x20
[<ffffffff8824fac1>] do_utimes+0xd1/0x180
[<ffffffff8824fbef>] SyS_utime+0x7f/0xc0
[<ffffffff8883d345>] ? tracesys+0x7e/0xe2
[<ffffffff8883d3a4>] tracesys+0xdd/0xe2
INFO: rcu_preempt detected stalls on CPUs/tasks:
Tasks blocked on level-0 rcu_node (CPUs 0-3): P766 P646
Tasks blocked on level-0 rcu_node (CPUs 0-3): P766 P646
(detected by 3, t=26007 jiffies, g=75434, c=75433, q=0)
trinity-c342 R running task 13384 766 32295 0x00000000
ffff880068943d98 0000000000000002 0000000000000000 ffff880193c8c680
00000000001d4100 0000000000000000 ffff880068943fd8 00000000001d4100
ffff88000188af00 ffff880193c8c680 ffff880068943fd8 0000000000000000
Call Trace:
[<ffffffff888368e2>] preempt_schedule_irq+0x52/0xb0
[<ffffffff8883df10>] retint_kernel+0x20/0x30
[<ffffffff8809f767>] ? pid_task+0x47/0xa0
[<ffffffff8809f73d>] ? pid_task+0x1d/0xa0
[<ffffffff8808d4f1>] kill_pid_info+0x61/0x130
[<ffffffff8808d495>] ? kill_pid_info+0x5/0x130
[<ffffffff8808d6d2>] SYSC_kill+0xf2/0x2f0
[<ffffffff8808d67b>] ? SYSC_kill+0x9b/0x2f0
[<ffffffff8819c2b7>] ? context_tracking_user_exit+0x57/0x280
[<ffffffff880136bd>] ? syscall_trace_enter+0x13d/0x310
[<ffffffff8808fd9e>] SyS_kill+0xe/0x10
[<ffffffff8883d3a4>] tracesys+0xdd/0xe2
trinity-c225 R running task 13448 646 32295 0x00000000
ffff880161ccfb78 0000000000000002 ffffffff88c993ed ffff88000bf85e00
00000000001d4100 0000000000000003 ffff880161ccffd8 00000000001d4100
ffff88005ea89780 ffff88000bf85e00 ffff880161ccffd8 0000000000000000
Call Trace:
[<ffffffff888368e2>] preempt_schedule_irq+0x52/0xb0
[<ffffffff8883df10>] retint_kernel+0x20/0x30
[<ffffffff8822303a>] ? lookup_fast+0xea/0x3d0
[<ffffffff88223025>] ? lookup_fast+0xd5/0x3d0
[<ffffffff88224857>] link_path_walk+0x1a7/0x8a0
[<ffffffff88224f95>] ? path_lookupat+0x45/0x7b0
[<ffffffff88224fb7>] path_lookupat+0x67/0x7b0
[<ffffffff880d385d>] ? trace_hardirqs_off+0xd/0x10
[<ffffffff8883dda4>] ? retint_restore_args+0xe/0xe
[<ffffffff8822572b>] filename_lookup+0x2b/0xc0
[<ffffffff88229c77>] user_path_at_empty+0x67/0xc0
[<ffffffff880d3dbe>] ? put_lock_stats.isra.27+0xe/0x30
[<ffffffff880d42a6>] ? lock_release_holdtime.part.28+0xe6/0x160
[<ffffffff880b15ad>] ? get_parent_ip+0xd/0x50
[<ffffffff88229ce1>] user_path_at+0x11/0x20
[<ffffffff8824fac1>] do_utimes+0xd1/0x180
[<ffffffff8824fbef>] SyS_utime+0x7f/0xc0
[<ffffffff8883d345>] ? tracesys+0x7e/0xe2
[<ffffffff8883d3a4>] tracesys+0xdd/0xe2
trinity-c342 R running task 13384 766 32295 0x00000000
ffff880068943d98 0000000000000002 0000000000000000 ffff880193c8c680
00000000001d4100 0000000000000000 ffff880068943fd8 00000000001d4100
ffff88000188af00 ffff880193c8c680 ffff880068943fd8 0000000000000000
Call Trace:
[<ffffffff888368e2>] preempt_schedule_irq+0x52/0xb0
[<ffffffff8883df10>] retint_kernel+0x20/0x30
[<ffffffff8809f767>] ? pid_task+0x47/0xa0
[<ffffffff8809f73d>] ? pid_task+0x1d/0xa0
[<ffffffff8808d4f1>] kill_pid_info+0x61/0x130
[<ffffffff8808d495>] ? kill_pid_info+0x5/0x130
[<ffffffff8808d6d2>] SYSC_kill+0xf2/0x2f0
[<ffffffff8808d67b>] ? SYSC_kill+0x9b/0x2f0
[<ffffffff8819c2b7>] ? context_tracking_user_exit+0x57/0x280
[<ffffffff880136bd>] ? syscall_trace_enter+0x13d/0x310
[<ffffffff8808fd9e>] SyS_kill+0xe/0x10
[<ffffffff8883d3a4>] tracesys+0xdd/0xe2
trinity-c225 R running task 13448 646 32295 0x00000000
ffff880161ccfb78 0000000000000002 ffffffff88c993ed ffff88000bf85e00
00000000001d4100 0000000000000003 ffff880161ccffd8 00000000001d4100
ffff88005ea89780 ffff88000bf85e00 ffff880161ccffd8 0000000000000000
Call Trace:
[<ffffffff888368e2>] preempt_schedule_irq+0x52/0xb0
[<ffffffff8883df10>] retint_kernel+0x20/0x30
[<ffffffff8822303a>] ? lookup_fast+0xea/0x3d0
[<ffffffff88223025>] ? lookup_fast+0xd5/0x3d0
[<ffffffff88224857>] link_path_walk+0x1a7/0x8a0
[<ffffffff88224f95>] ? path_lookupat+0x45/0x7b0
[<ffffffff88224fb7>] path_lookupat+0x67/0x7b0
[<ffffffff880d385d>] ? trace_hardirqs_off+0xd/0x10
[<ffffffff8883dda4>] ? retint_restore_args+0xe/0xe
[<ffffffff8822572b>] filename_lookup+0x2b/0xc0
[<ffffffff88229c77>] user_path_at_empty+0x67/0xc0
[<ffffffff880d3dbe>] ? put_lock_stats.isra.27+0xe/0x30
[<ffffffff880d42a6>] ? lock_release_holdtime.part.28+0xe6/0x160
[<ffffffff880b15ad>] ? get_parent_ip+0xd/0x50
[<ffffffff88229ce1>] user_path_at+0x11/0x20
[<ffffffff8824fac1>] do_utimes+0xd1/0x180
[<ffffffff8824fbef>] SyS_utime+0x7f/0xc0
[<ffffffff8883d345>] ? tracesys+0x7e/0xe2
[<ffffffff8883d3a4>] tracesys+0xdd/0xe2
This is on Linus' current tree, with the new CONFIG_TASKS_RCU unset.
Dave
next reply other threads:[~2014-10-13 17:35 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-13 17:35 Dave Jones [this message]
2014-10-15 2:35 ` Sasha Levin
2014-10-23 18:39 ` Paul E. McKenney
2014-10-23 18:55 ` Sasha Levin
2014-10-23 19:58 ` Paul E. McKenney
2014-10-24 12:28 ` Sasha Levin
2014-10-24 16:13 ` Paul E. McKenney
2014-10-24 16:39 ` Sasha Levin
2014-10-27 21:13 ` Paul E. McKenney
2014-10-27 23:44 ` Paul E. McKenney
2014-11-13 23:07 ` Paul E. McKenney
2014-11-13 23:10 ` Sasha Levin
2014-10-30 23:41 ` Sasha Levin
2014-10-23 18:32 ` Paul E. McKenney
2014-10-23 18:40 ` Dave Jones
2014-10-23 19:28 ` Paul E. McKenney
2014-10-23 19:37 ` Dave Jones
2014-10-23 19:52 ` Paul E. McKenney
2014-10-23 20:28 ` Dave Jones
2014-10-23 20:44 ` Paul E. McKenney
2014-10-23 19:13 ` Oleg Nesterov
2014-10-23 19:38 ` Paul E. McKenney
2014-10-23 19:53 ` Oleg Nesterov
2014-10-23 20:24 ` Paul E. McKenney
2014-10-23 21:13 ` Oleg Nesterov
2014-10-23 21:38 ` Paul E. McKenney
2014-10-25 3:16 ` Dâniel Fraga
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20141013173504.GA27955@redhat.com \
--to=davej@redhat.com \
--cc=htejun@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=paulmck@linux.vnet.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
Powered by JetHome