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Date: Tue, 24 Oct 2017 04:49:52 +0200
From: Fengguang Wu <fengguang.wu@...el.com>
To: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc: wfg@...ux.intel.com, linux-kernel@...r.kernel.org, LKP <lkp@...org>
Subject: 492b95e597 ("rcuperf: Set more user-friendly defaults"): WARNING:
CPU: 0 PID: 1 at arch/x86/kernel/smp.c:128 native_smp_send_reschedule
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 492b95e59735998312f678d77a2d5fe20af6b0b9
Author: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
AuthorDate: Fri Apr 21 16:09:15 2017 -0700
Commit: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
CommitDate: Thu Jun 8 08:25:31 2017 -0700
rcuperf: Set more user-friendly defaults
Common-case use of rcuperf must set rcuperf.nreaders=0 and if not built
as a module, rcuperf.shutdown. This commit therefore sets the default
for rcuperf.nreaders to zero and sets the default for rcuperf.shutdown
to zero if rcuperf is built as a module and to one otherwise.
Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
3ddf20c953 srcu: Shrink Tiny SRCU a bit more
492b95e597 rcuperf: Set more user-friendly defaults
bb176f6709 Linux 4.14-rc6
36ef71cae3 Add linux-next specific files for 20171018
+--------------------------------------------------------------+------------+------------+-----------+---------------+
| | 3ddf20c953 | 492b95e597 | v4.14-rc6 | next-20171018 |
+--------------------------------------------------------------+------------+------------+-----------+---------------+
| boot_successes | 910 | 21 | 199 | 60 |
| boot_failures | 0 | 9 | 111 | 21 |
| WARNING:at_arch/x86/kernel/smp.c:#native_smp_send_reschedule | 0 | 9 | 111 | 21 |
+--------------------------------------------------------------+------------+------------+-----------+---------------+
[ 29.173654] augmented rbtree testing
[ 32.263469] -> 83223 cycles
[ 32.540332] gpio_it87: no device
[ 32.541422] sched: Unexpected reschedule of offline CPU#1!
[ 32.542355] ------------[ cut here ]------------
[ 32.543057] WARNING: CPU: 0 PID: 1 at arch/x86/kernel/smp.c:128 native_smp_send_reschedule+0x83/0xbb
[ 32.544646] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.12.0-rc4-00028-g492b95e #1
[ 32.545397] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 32.546381] task: ffff88001e2e0000 task.stack: ffff88001e2e8000
[ 32.547031] RIP: 0010:native_smp_send_reschedule+0x83/0xbb
[ 32.547642] RSP: 0000:ffff88001e2ebca0 EFLAGS: 00010086
[ 32.548225] RAX: 000000000000002e RBX: 0000000000000003 RCX: 0000000000000000
[ 32.548989] RDX: 0000002e00000001 RSI: 0000000000000000 RDI: 0000000000000096
[ 32.550034] RBP: ffff88001e2ebcb8 R08: 0000000000000003 R09: 0000000000000000
[ 32.551039] R10: ffff88001e2e0758 R11: 0000000000021001 R12: 0000000000000001
[ 32.551996] R13: 0000000000000000 R14: ffff88001e380000 R15: ffff88001e500000
[ 32.552727] FS: 0000000000000000(0000) GS:ffff88001e400000(0000) knlGS:0000000000000000
[ 32.553585] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 32.554227] CR2: 0000000000000000 CR3: 000000000260f000 CR4: 00000000000006b0
[ 32.555288] Call Trace:
[ 32.555687] smp_send_reschedule+0xa/0xc
[ 32.556313] try_to_wake_up+0x27e/0x2e4
[ 32.556870] wake_up_process+0x15/0x17
[ 32.557374] wake_up_worker+0x5f/0x6a
[ 32.557982] pwq_adjust_max_active+0x154/0x191
[ 32.558444] link_pwq+0xc3/0x10a
[ 32.558828] __alloc_workqueue_key+0x325/0x695
[ 32.559288] ? ftrace_likely_update+0x78/0x81
[ 32.559810] ? pci_epf_init+0x52/0x52
[ 32.560222] ? do_early_param+0xfd/0xfd
[ 32.560643] pci_epf_test_init+0x30/0x7c
[ 32.561063] ? pci_epf_init+0x52/0x52
[ 32.561431] do_one_initcall+0xbc/0x1f7
[ 32.562099] ? do_early_param+0xfd/0xfd
[ 32.562760] kernel_init_freeable+0x13f/0x233
[ 32.563497] ? rest_init+0xd6/0xd6
[ 32.564046] kernel_init+0x14/0x1c5
[ 32.564565] ? rest_init+0xd6/0xd6
[ 32.564987] ret_from_fork+0x2a/0x40
[ 32.565345] Code: 00 00 31 d2 be 01 00 00 00 48 c7 c7 88 40 7d 82 e8 8c 48 18 00 44 89 e6 48 c7 c7 5a 68 3d 82 48 ff 05 70 78 87 01 e8 45 a5 1b 00 <0f> ff b9 01 00 00 00 31 d2 be 01 00 00 00 48 c7 c7 58 40 7d 82
[ 32.568020] ---[ end trace 6590e27884081b3a ]---
[ 32.570056] VIA Graphics Integration Chipset framebuffer 2.4 initializing
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start v4.13 v4.12 --
git bisect bad 63a86362130f4c17eaa57f3ef5171ec43111a54e # 14:39 B 16 1 0 6 Merge tag 'pm-4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
git bisect bad 090a81d8766e21d33ab3e4d24e6c8e5eedf086dd # 14:44 B 11 5 0 7 Merge branch 'for-spi' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
git bisect bad 3bad2f1c676581d01e7645eb03e9b27e28b0a92e # 16:22 B 45 2 7 13 Merge branch 'work.misc-set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
git bisect bad 362f6729cbb1d6bbab59e069f19441b0622ff7ec # 16:27 B 20 1 0 5 Merge tag 'usb-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
git bisect bad 6553698be05983056f5561cef6aaee0cc6afe7a0 # 16:28 B 17 1 0 10 Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad 892ad5acca0b2ddb514fae63fa4686bf726d2471 # 16:33 B 21 2 0 5 Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 26d3a77d2cb3cb31bbaa2de37b7a4e6375f204ee # 19:02 G 155 0 0 0 Merge tag 'edac_for_4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp
git bisect bad 330e9e46253cbfab178450c976aa90ef0f3ae940 # 19:02 B 21 3 0 4 Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good e94693f797400b9f424c69e1da9381e4846762fe # 19:46 G 155 0 0 0 Merge branch 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad 511324e462a12ea8be1a7e5fc63a992134db80d7 # 19:48 B 18 1 0 9 rcu: Use RCU_NOCB_WAKE rather than RCU_NOGP_WAKE
git bisect good 59ca3f9fef599cc6da7975d2261ab3bb86a6ac6b # 20:21 G 155 0 0 0 rcuperf: Add the ability to test tiny RCU flavors
git bisect bad 59d80fd8351b7b9a5dc7bbfa8bc4ca19f6ff3dad # 21:22 B 61 1 5 11 rcu: Print out rcupdate.c non-default boot-time settings
git bisect bad b562b85c3a8c395d49aca6a46b321299d6e49ff1 # 21:27 B 15 5 0 10 srcu-cbmc: Use /usr/bin/awk instead of /bin/awk
git bisect good 41f364819fbfc092462e3c85283fa887c8159387 # 22:22 G 310 0 0 0 rcutorture: Reduce CPUs dedicated to testing Classic SRCU
git bisect bad 492b95e59735998312f678d77a2d5fe20af6b0b9 # 22:22 B 21 1 0 9 rcuperf: Set more user-friendly defaults
git bisect good 3ddf20c953520203c42dbed1f091ed52080e1cd2 # 22:56 G 305 0 0 0 srcu: Shrink Tiny SRCU a bit more
# first bad commit: [492b95e59735998312f678d77a2d5fe20af6b0b9] rcuperf: Set more user-friendly defaults
git bisect good 3ddf20c953520203c42dbed1f091ed52080e1cd2 # 01:01 G 910 0 0 0 srcu: Shrink Tiny SRCU a bit more
# extra tests on HEAD of linux-next/master
git bisect bad 36ef71cae353f88fd6e095e2aaa3e5953af1685d # 01:02 B 29 15 0 6 Add linux-next specific files for 20171018
# extra tests on tree/branch linus/master
git bisect bad bb176f67090ca54869fc1262c913aa69d2ede070 # 01:56 B 19 2 5 5 Linux 4.14-rc6
# extra tests with first bad commit reverted
git bisect good 00425bff9132ab95f35cc901571adfd591d29df6 # 06:20 G 303 0 0 0 Revert "rcuperf: Set more user-friendly defaults"
# extra tests on tree/branch linux-next/master
git bisect bad 36ef71cae353f88fd6e095e2aaa3e5953af1685d # 06:22 B 29 15 0 6 Add linux-next specific files for 20171018
---
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