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Message-ID: <20170209021248.GA10568@yexl-desktop>
Date: Thu, 9 Feb 2017 10:12:48 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Herbert Xu <herbert@...dor.apana.org.au>
Cc: "David S. Miller" <davem@...emloft.net>,
Thomas Graf <tgraf@...g.ch>, netdev@...r.kernel.org, lkp@...org
Subject: [lkp-robot] [rhashtable] 60be2ebf32: INFO:suspicious_RCU_usage
FYI, we noticed the following commit:
commit: 60be2ebf326aa90c88e9a967412557d832a1612e ("rhashtable: Add nested tables")
url: https://github.com/0day-ci/linux/commits/Herbert-Xu/rhashtable-Handle-table-allocation-failure-during-insertion/20170207-204835
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu host -smp 2 -m 2G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-------------------------------------------------+------------+------------+
| | 12f609851b | 60be2ebf32 |
+-------------------------------------------------+------------+------------+
| boot_successes | 123 | 5 |
| boot_failures | 9 | 8 |
| BUG:kernel_reboot-without-warning_in_test_stage | 9 | |
| INFO:suspicious_RCU_usage | 0 | 8 |
+-------------------------------------------------+------------+------------+
[ 222.678280] [ INFO: suspicious RCU usage. ]
[ 222.678280] [ INFO: suspicious RCU usage. ]
[ 222.699410] 4.10.0-rc6-00112-g60be2eb #534 Not tainted
[ 222.699410] 4.10.0-rc6-00112-g60be2eb #534 Not tainted
[ 222.725264] -------------------------------
[ 222.725264] -------------------------------
[ 222.741887] lib/rhashtable.c:1125 suspicious rcu_dereference_check() usage!
[ 222.741887] lib/rhashtable.c:1125 suspicious rcu_dereference_check() usage!
[ 222.783537]
[ 222.783537] other info that might help us debug this:
[ 222.783537]
[ 222.783537]
[ 222.783537] other info that might help us debug this:
[ 222.783537]
[ 222.823615]
[ 222.823615] rcu_scheduler_active = 2, debug_locks = 1
[ 222.823615]
[ 222.823615] rcu_scheduler_active = 2, debug_locks = 1
[ 222.856672] 4 locks held by kworker/0:1/19:
[ 222.856672] 4 locks held by kworker/0:1/19:
[ 222.877765] #0: ("events"){.+.+.+}, at: [<ffffffff810e6bf5>] process_one_work+0x2ac/0x761
[ 222.877765] #0: ("events"){.+.+.+}, at: [<ffffffff810e6bf5>] process_one_work+0x2ac/0x761
[ 222.917921] #1: ((&ht->run_work)){+.+.+.}, at: [<ffffffff810e6c1f>] process_one_work+0x2d6/0x761
[ 222.917921] #1: ((&ht->run_work)){+.+.+.}, at: [<ffffffff810e6c1f>] process_one_work+0x2d6/0x761
[ 222.960763] #2: (&ht->mutex){+.+.+.}, at: [<ffffffff8145b13a>] rht_deferred_worker+0x22/0x26a
[ 222.960763] #2: (&ht->mutex){+.+.+.}, at: [<ffffffff8145b13a>] rht_deferred_worker+0x22/0x26a
[ 223.004378] #3: (&(&tbl->locks[i])->rlock){+.....}, at: [<ffffffff8145abce>] rhashtable_rehash_table+0xf6/0x640
[ 223.004378] #3: (&(&tbl->locks[i])->rlock){+.....}, at: [<ffffffff8145abce>] rhashtable_rehash_table+0xf6/0x640
[ 223.055769]
[ 223.055769] stack backtrace:
[ 223.055769]
[ 223.055769] stack backtrace:
[ 223.078034] CPU: 0 PID: 19 Comm: kworker/0:1 Not tainted 4.10.0-rc6-00112-g60be2eb #534
[ 223.078034] CPU: 0 PID: 19 Comm: kworker/0:1 Not tainted 4.10.0-rc6-00112-g60be2eb #534
[ 223.118613] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 223.118613] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 223.169614] Workqueue: events rht_deferred_worker
[ 223.169614] Workqueue: events rht_deferred_worker
[ 223.193302] Call Trace:
[ 223.193302] Call Trace:
[ 223.205882] dump_stack+0x19/0x1b
[ 223.205882] dump_stack+0x19/0x1b
[ 223.222639] lockdep_rcu_suspicious+0xdd/0xf4
[ 223.222639] lockdep_rcu_suspicious+0xdd/0xf4
[ 223.244610] rht_bucket_nested+0x107/0x10c
[ 223.244610] rht_bucket_nested+0x107/0x10c
[ 223.265382] rhashtable_rehash_table+0x373/0x640
[ 223.265382] rhashtable_rehash_table+0x373/0x640
[ 223.289295] rht_deferred_worker+0x112/0x26a
[ 223.289295] rht_deferred_worker+0x112/0x26a
[ 223.308573] process_one_work+0x3b7/0x761
[ 223.308573] process_one_work+0x3b7/0x761
[ 223.328696] ? process_one_work+0x2d6/0x761
[ 223.328696] ? process_one_work+0x2d6/0x761
[ 223.349210] worker_thread+0x2aa/0x6a5
[ 223.349210] worker_thread+0x2aa/0x6a5
[ 223.368199] kthread+0x107/0x13a
[ 223.368199] kthread+0x107/0x13a
[ 223.384633] ? process_one_work+0x761/0x761
[ 223.384633] ? process_one_work+0x761/0x761
[ 223.405721] ? __kthread_create_on_node+0x232/0x232
[ 223.405721] ? __kthread_create_on_node+0x232/0x232
[ 223.430350] ret_from_fork+0x31/0x40
[ 223.430350] ret_from_fork+0x31/0x40
[ 223.448309]
[ 223.448309]
[ 223.456052] ===============================
[ 223.456052] ===============================
[ 223.477118] [ INFO: suspicious RCU usage. ]
[ 223.477118] [ INFO: suspicious RCU usage. ]
[ 223.498249] 4.10.0-rc6-00112-g60be2eb #534 Not tainted
[ 223.498249] 4.10.0-rc6-00112-g60be2eb #534 Not tainted
[ 223.524590] -------------------------------
[ 223.524590] -------------------------------
[ 223.545889] lib/rhashtable.c:1130 suspicious rcu_dereference_check() usage!
[ 223.545889] lib/rhashtable.c:1130 suspicious rcu_dereference_check() usage!
[ 223.588207]
[ 223.588207] other info that might help us debug this:
[ 223.588207]
[ 223.588207]
[ 223.588207] other info that might help us debug this:
[ 223.588207]
[ 223.630761]
[ 223.630761] rcu_scheduler_active = 2, debug_locks = 1
[ 223.630761]
[ 223.630761] rcu_scheduler_active = 2, debug_locks = 1
[ 223.663675] 4 locks held by kworker/0:1/19:
[ 223.663675] 4 locks held by kworker/0:1/19:
[ 223.684903] #0: ("events"){.+.+.+}, at: [<ffffffff810e6bf5>] process_one_work+0x2ac/0x761
[ 223.684903] #0: ("events"){.+.+.+}, at: [<ffffffff810e6bf5>] process_one_work+0x2ac/0x761
[ 223.727266] #1: ((&ht->run_work)){+.+.+.}, at: [<ffffffff810e6c1f>] process_one_work+0x2d6/0x761
[ 223.727266] #1: ((&ht->run_work)){+.+.+.}, at: [<ffffffff810e6c1f>] process_one_work+0x2d6/0x761
[ 223.772273] #2: (&ht->mutex){+.+.+.}, at: [<ffffffff8145b13a>] rht_deferred_worker+0x22/0x26a
[ 223.772273] #2: (&ht->mutex){+.+.+.}, at: [<ffffffff8145b13a>] rht_deferred_worker+0x22/0x26a
[ 223.815952] #3: (&(&tbl->locks[i])->rlock){+.....}, at: [<ffffffff8145abce>] rhashtable_rehash_table+0xf6/0x640
[ 223.815952] #3: (&(&tbl->locks[i])->rlock){+.....}, at: [<ffffffff8145abce>] rhashtable_rehash_table+0xf6/0x640
[ 223.867261]
[ 223.867261] stack backtrace:
[ 223.867261]
[ 223.867261] stack backtrace:
[ 223.889319] CPU: 0 PID: 19 Comm: kworker/0:1 Not tainted 4.10.0-rc6-00112-g60be2eb #534
[ 223.889319] CPU: 0 PID: 19 Comm: kworker/0:1 Not tainted 4.10.0-rc6-00112-g60be2eb #534
[ 223.929997] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 223.929997] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 223.981005] Workqueue: events rht_deferred_worker
[ 223.981005] Workqueue: events rht_deferred_worker
[ 224.004663] Call Trace:
[ 224.004663] Call Trace:
[ 224.017225] dump_stack+0x19/0x1b
[ 224.017225] dump_stack+0x19/0x1b
[ 224.034147] lockdep_rcu_suspicious+0xdd/0xf4
[ 224.034147] lockdep_rcu_suspicious+0xdd/0xf4
[ 224.056211] rht_bucket_nested+0xb1/0x10c
[ 224.056211] rht_bucket_nested+0xb1/0x10c
[ 224.076497] rhashtable_rehash_table+0x373/0x640
[ 224.076497] rhashtable_rehash_table+0x373/0x640
[ 224.099931] rht_deferred_worker+0x112/0x26a
[ 224.099931] rht_deferred_worker+0x112/0x26a
[ 224.122059] process_one_work+0x3b7/0x761
[ 224.122059] process_one_work+0x3b7/0x761
[ 224.142702] ? process_one_work+0x2d6/0x761
[ 224.142702] ? process_one_work+0x2d6/0x761
[ 224.163871] worker_thread+0x2aa/0x6a5
[ 224.163871] worker_thread+0x2aa/0x6a5
[ 224.182764] kthread+0x107/0x13a
[ 224.182764] kthread+0x107/0x13a
[ 224.199164] ? process_one_work+0x761/0x761
[ 224.199164] ? process_one_work+0x761/0x761
[ 224.220351] ? __kthread_create_on_node+0x232/0x232
[ 224.220351] ? __kthread_create_on_node+0x232/0x232
[ 224.244855] ret_from_fork+0x31/0x40
[ 224.244855] ret_from_fork+0x31/0x40
[ 234.724349] Started 10 threads, 0 failed
[ 234.724349] Started 10 threads, 0 failed
[ 234.962237] test_printf: all 260 tests passed
[ 234.962237] test_printf: all 260 tests passed
[ 235.933585] test_bitmap: all 460506 tests passed
[ 235.933585] test_bitmap: all 460506 tests passed
[ 235.974966] test_uuid: all 18 tests passed
[ 235.974966] test_uuid: all 18 tests passed
[ 236.023025] glob: 64 self-tests passed, 0 failed
[ 236.023025] glob: 64 self-tests passed, 0 failed
[ 236.048527] rbtree testing
[ 236.048527] rbtree testing
[ 243.915063] -> 177860 cycles
[ 243.915063] -> 177860 cycles
[ 245.007005] augmented rbtree testing
[ 245.007005] augmented rbtree testing
[ 254.991361] -> 225745 cycles
[ 254.991361] -> 225745 cycles
[ 256.827942] gpio_it87: no device
[ 256.827942] gpio_it87: no device
[ 256.853015] gpio-mockup: probe of gpio-mockup failed with error -22
[ 256.853015] gpio-mockup: probe of gpio-mockup failed with error -22
[ 256.918377] cr_bllcd: INTEL CARILLO RANCH LPC not found.
[ 256.918377] cr_bllcd: INTEL CARILLO RANCH LPC not found.
[ 256.946920] cr_bllcd: Carillo Ranch Backlight Driver Initialized.
[ 256.946920] cr_bllcd: Carillo Ranch Backlight Driver Initialized.
[ 256.997383] vmlfb: initializing
[ 256.997383] vmlfb: initializing
[ 257.017758] no IO addresses supplied
[ 257.017758] no IO addresses supplied
[ 257.040767] hgafb: HGA card not detected.
[ 257.040767] hgafb: HGA card not detected.
[ 257.062684] hgafb: probe of hgafb.0 failed with error -22
[ 257.062684] hgafb: probe of hgafb.0 failed with error -22
[ 257.102876] uvesafb: failed to execute /sbin/v86d
[ 257.102876] uvesafb: failed to execute /sbin/v86d
[ 257.126137] uvesafb: make sure that the v86d helper is installed and executable
[ 257.126137] uvesafb: make sure that the v86d helper is installed and executable
To reproduce:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Xiaolong
View attachment "config-4.10.0-rc6-00112-g60be2eb" of type "text/plain" (104882 bytes)
View attachment "job-script" of type "text/plain" (4211 bytes)
Download attachment "dmesg.xz" of type "application/octet-stream" (16528 bytes)
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