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Message-ID: <20171130053205.wzm5pga72dafqmy3@wfg-t540p.sh.intel.com>
Date:   Thu, 30 Nov 2017 13:32:05 +0800
From:   Fengguang Wu <fengguang.wu@...el.com>
To:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:     Josh Triplett <josh@...htriplett.org>,
        linux-kernel@...r.kernel.org, LKP <lkp@...org>
Subject: 02a5c550b2 ("rcu: Abstract extended quiescent state determination"):
 BUG: kernel reboot-without-warning in test stage

Greetings,

0day kernel testing robot got the below dmesg and the first bad commit is

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

commit 02a5c550b2738f2bfea8e1e00aa75944d71c9e18
Author:     Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
AuthorDate: Wed Nov 2 17:25:06 2016 -0700
Commit:     Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
CommitDate: Mon Jan 23 11:44:18 2017 -0800

     rcu: Abstract extended quiescent state determination
     
     This commit is the fourth step towards full abstraction of all accesses
     to the ->dynticks counter, implementing previously open-coded checks and
     comparisons in new rcu_dynticks_in_eqs() and rcu_dynticks_in_eqs_since()
     functions.  This abstraction will ease changes to the ->dynticks counter
     operation.
     
     Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
     Reviewed-by: Josh Triplett <josh@...htriplett.org>

2625d469ba  rcu: Abstract dynticks extended quiescent state enter/exit operations
02a5c550b2  rcu: Abstract extended quiescent state determination
b915176102  Merge tag 'nfsd-4.15-1' of git://linux-nfs.org/~bfields/linux
d127129e85  Add linux-next specific files for 20171129
+-------------------------------------------------+------------+------------+------------+---------------+
|                                                 | 2625d469ba | 02a5c550b2 | b915176102 | next-20171129 |
+-------------------------------------------------+------------+------------+------------+---------------+
| boot_successes                                  | 910        | 575        | 171        | 73            |
| boot_failures                                   | 0          | 28         | 2          | 2             |
| BUG:kernel_reboot-without-warning_in_test_stage | 0          | 8          | 2          | 2             |
| BUG:kernel_hang_in_test_stage                   | 0          | 20         |            |               |
+-------------------------------------------------+------------+------------+------------+---------------+

[main] Setsockopt(1 5 12db000 70) on fd 376 [2:1:6]
[main] Setsockopt(29 3 12db000 4) on fd 377 [10:1:0]
[main] Setsockopt(1 2b 12db000 4) on fd 378 [17:2:2048]
[main] Setsockopt(1 29 12db000 4f) on fd 379 [30:5:0]
[main] 375 sockets created based on info from socket cachefile.
BUG: kernel reboot-without-warning in test stage


                                                           # HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start v4.11 v4.10 --
git bisect  bad ce70df089143c49385b4f32f39d41fb50fbf6a7c  # 16:38  B     12     2    0   6  mm, gup: fix typo in gup_p4d_range()
git bisect  bad 94eae8034002401d71ae950106659e16add36e77  # 16:58  B      1     1    0   0  Merge tag 'platform-drivers-x86-v4.11-1' of git://git.infradead.org/linux-platform-drivers-x86
git bisect  bad 7bb033829ef3ecfc491c0ed0197966e8f197fbdc  # 18:29  B     36     1    0   0  Merge tag 'rodata-v4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
git bisect  bad f790bd9c8e826434ab6c326b225276ed0f73affe  # 19:14  B     23     2    0   0  Merge tag 'regulator-v4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
git bisect  bad 4cee9fe53e4d181b608c7758090ed492b45d6801  # 19:44  B     19     1    0   0  Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 575260e3f8f8ac72dc0c41a4a20190d1a5f2b887  # 21:45  G    302     0    0   0  Merge branch 'core-debugobjects-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect  bad 7f4eb0a6d5a76ee054acd7255c05b8d5ca31c5d9  # 21:54  B     11     2    0   0  Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect  bad f7458a5d631df2ecdbfe4a606053aba19913cc41  # 22:03  B     33     1    0   0  Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 8dc79888a792f6c365c2a26903e49ff919e72488  # 11:37  G    300     0    2  15  rcu: Add lockdep checks to synchronous expedited primitives
git bisect good 7d025948e4982ee3fa741c0fa56385c8b4a7072d  # 02:40  G    300     0  233 235  torture: Enable DEBUG_OBJECTS_RCU_HEAD for Tiny RCU
git bisect  bad 38d30b336ccf8ee98e0e494a13738a0fade5a5e6  # 02:52  B      7     1    0   0  rcu: Adjust FQS offline checks for exact online-CPU detection
git bisect good 2625d469baeef3aabdfe122572e00c517e2d9451  # 05:39  G    310     0    0   0  rcu: Abstract dynticks extended quiescent state enter/exit operations
git bisect  bad 3a19b46a5c17b12ef0691df19c676ba3da330a57  # 06:27  B     49     1    0   1  rcu: Check cond_resched_rcu_qs() state less often to reduce GP overhead
git bisect  bad 02a5c550b2738f2bfea8e1e00aa75944d71c9e18  # 06:41  B     12     1    0   0  rcu: Abstract extended quiescent state determination
# first bad commit: [02a5c550b2738f2bfea8e1e00aa75944d71c9e18] rcu: Abstract extended quiescent state determination
git bisect good 2625d469baeef3aabdfe122572e00c517e2d9451  # 10:49  G    910     0    0   0  rcu: Abstract dynticks extended quiescent state enter/exit operations
# extra tests on HEAD of percpu/for-4.15-fixes
git bisect  bad abee210500ed15a22787009d9210b9a34911afcc  # 10:49  B     32     2    0   0  percpu: hack to let the CRIS architecture to boot until they clean up
# extra tests on tree/branch linus/master
git bisect  bad b9151761021e25c024a6670df4e7c43ffbab0e1d  # 11:14  B     29     1    0   0  Merge tag 'nfsd-4.15-1' of git://linux-nfs.org/~bfields/linux
# extra tests on tree/branch linux-next/master
git bisect  bad d127129e85a020879f334154300ddd3f7ec21c1e  # 11:37  B      5     2    0   0  Add linux-next specific files for 20171129

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/lkp                          Intel Corporation

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