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Date: Tue, 8 May 2018 13:29:47 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc: LKML <linux-kernel@...r.kernel.org>,
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, lkp@...org
Subject: [lkp-robot] [EXP rcu] 21560e1007:
WARNING:possible_recursive_locking_detected
FYI, we noticed the following commit (built with gcc-7):
commit: 21560e10077bf9f7baf69aa82527850271173862 ("EXP rcu: Diagnostics for grace-period hangs")
https://git.kernel.org/cgit/linux/kernel/git/paulmck/linux-rcu.git dev.2018.05.01a
in testcase: ebizzy
with following parameters:
nr_threads: 200%
iterations: 100x
duration: 10s
test-description: ebizzy is designed to generate a workload resembling common web application server workloads.
test-url: http://ebizzy.sourceforge.net/
on test machine: qemu-system-x86_64 -enable-kvm -cpu kvm64,+ssse3 -m 1G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+---------------------------------------------+------------+------------+
| | ed569311d8 | 21560e1007 |
+---------------------------------------------+------------+------------+
| boot_successes | 4 | 4 |
| boot_failures | 8 | 8 |
| invoked_oom-killer:gfp_mask=0x | 8 | |
| Mem-Info | 8 | |
| Out_of_memory:Kill_process | 8 | |
| WARNING:possible_recursive_locking_detected | 0 | 8 |
| RIP:arch_local_irq_restore | 0 | 5 |
| BUG:kernel_hang_in_boot_stage | 0 | 8 |
| RIP:__mutex_unlock_slowpath | 0 | 1 |
| RIP:kernfs_activate | 0 | 1 |
| RIP:debug_lockdep_rcu_enabled | 0 | 1 |
+---------------------------------------------+------------+------------+
[ 2.079791] WARNING: possible recursive locking detected
[ 2.080000] 4.17.0-rc1-00048-g21560e1 #1 Not tainted
[ 2.080000] --------------------------------------------
[ 2.080000] swapper/0/1 is trying to acquire lock:
[ 2.080000] 000000007895dd2f (rcu_node_0){..-.}, at: rcu_process_callbacks+0x4b3/0xa28
[ 2.080000]
[ 2.080000] but task is already holding lock:
[ 2.080000] 000000007895dd2f (rcu_node_0){..-.}, at: rcu_process_callbacks+0x3cf/0xa28
[ 2.080000]
[ 2.080000] other info that might help us debug this:
[ 2.080000] Possible unsafe locking scenario:
[ 2.080000]
[ 2.080000] CPU0
[ 2.080000] ----
[ 2.080000] lock(rcu_node_0);
[ 2.080000] lock(rcu_node_0);
[ 2.080000]
[ 2.080000] *** DEADLOCK ***
[ 2.080000]
[ 2.080000] May be due to missing lock nesting notation
[ 2.080000]
[ 2.080000] 1 lock held by swapper/0/1:
[ 2.080000] #0: 000000007895dd2f (rcu_node_0){..-.}, at: rcu_process_callbacks+0x3cf/0xa28
[ 2.080000]
[ 2.080000] stack backtrace:
[ 2.080000] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.17.0-rc1-00048-g21560e1 #1
[ 2.080000] Call Trace:
[ 2.080000] <IRQ>
[ 2.080000] dump_stack+0x117/0x182
[ 2.080000] validate_chain+0x8d4/0xec0
[ 2.080000] ? lookup_chain_cache+0x4a/0x9c
[ 2.080000] ? validate_chain+0x9e/0xec0
[ 2.080000] ? lookup_chain_cache+0x4a/0x9c
[ 2.080000] ? lookup_chain_cache+0x4a/0x9c
[ 2.080000] ? lookup_chain_cache+0x4a/0x9c
[ 2.080000] ? __lock_acquire+0x8ed/0x9da
[ 2.080000] __lock_acquire+0x8ed/0x9da
[ 2.080000] lock_acquire+0x9e/0xcd
[ 2.080000] ? rcu_process_callbacks+0x4b3/0xa28
[ 2.080000] _raw_spin_lock_irqsave+0x60/0x88
[ 2.080000] ? rcu_process_callbacks+0x4b3/0xa28
[ 2.080000] rcu_process_callbacks+0x4b3/0xa28
[ 2.080000] ? kvm_clock_read+0x2f/0x45
[ 2.080000] ? kvm_sched_clock_read+0xc/0x1b
[ 2.080000] ? paravirt_sched_clock+0xc/0x16
[ 2.080000] ? sched_clock+0xc/0x14
[ 2.080000] ? sched_clock_local+0x10/0xb8
[ 2.080000] __do_softirq+0x134/0x303
[ 2.080000] irq_exit+0x92/0x143
[ 2.080000] smp_apic_timer_interrupt+0xb9/0xcb
[ 2.080000] apic_timer_interrupt+0xf/0x20
[ 2.080000] </IRQ>
[ 2.080000] RIP: 0010:arch_local_irq_restore+0x9/0x16
[ 2.080000] RSP: 0000:ffff88000fe63ce0 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
[ 2.080000] RAX: ffff88000fe58040 RBX: 0000000000000206 RCX: ffff88000fe63b1c
[ 2.080000] RDX: 0000000000000001 RSI: 0000000000000001 RDI: 0000000000000206
[ 2.080000] RBP: ffff8800346be9b8 R08: ffff8800346beba8 R09: 0000000100080005
[ 2.080000] R10: ffff88000fe63ce8 R11: 0000000000000000 R12: 00000000014080c0
[ 2.080000] R13: ffffffff812c4f20 R14: ffff88000fcac5c0 R15: 0000000000000000
[ 2.080000] ? __kernfs_new_node+0x56/0x177
[ 2.080000] __slab_alloc+0xa1/0xb2
[ 2.080000] ? __kernfs_new_node+0x56/0x177
[ 2.080000] kmem_cache_alloc+0xe6/0x12c
[ 2.080000] __kernfs_new_node+0x56/0x177
[ 2.080000] kernfs_new_node+0x1d/0x4e
[ 2.080000] __kernfs_create_file+0x38/0x11c
[ 2.080000] sysfs_add_file_mode_ns+0x10a/0x238
[ 2.080000] internal_create_group+0x245/0x404
[ 2.080000] sysfs_create_group+0x11/0x19
[ 2.080000] param_sysfs_init+0x479/0x520
[ 2.080000] ? trace_hardirqs_on_caller+0x219/0x2bc
[ 2.080000] ? trace_hardirqs_on+0x17/0x1f
[ 2.080000] ? locate_module_kobject+0x125/0x125
[ 2.080000] do_one_initcall+0xb4/0x214
[ 2.080000] kernel_init_freeable+0x36a/0x480
[ 2.080000] ? rest_init+0x130/0x130
[ 2.080000] kernel_init+0xc/0x1a0
[ 2.080000] ret_from_fork+0x3a/0x50
BUG: kernel hang in boot stage
Elapsed time: 830
#!/bin/bash
# To reproduce,
# 1) save job-script and this script (both are attached in 0day report email)
# 2) run this script with your compiled kernel and optional env $INSTALL_MOD_PATH
kernel=$1
initrds=(
/osimage/debian/debian-x86_64-2016-08-31.cgz
/lkp/lkp/lkp-x86_64.cgz
/osimage/deps/debian-x86_64-2016-08-31.cgz/run-ipconfig_2016-11-15.cgz
/osimage/deps/debian-x86_64-2016-08-31.cgz/lkp_2018-04-19.cgz
/osimage/deps/debian-x86_64-2016-08-31.cgz/rsync-rootfs_2016-11-15.cgz
/osimage/pkg/debian-x86_64-2016-08-31.cgz/ebizzy-x86_64_2016-11-16.cgz
/osimage/deps/debian-x86_64-2016-08-31.cgz/mpstat_2017-12-25.cgz
/osimage/deps/debian-x86_64-2016-08-31.cgz/turbostat_2016-11-15.cgz
/osimage/pkg/debian-x86_64-2016-08-31.cgz/turbostat-x86_64-d5256b2_2017-06-20.cgz
/osimage/deps/debian-x86_64-2016-08-31.cgz/perf_2018-04-04.cgz
To reproduce:
git clone https://github.com/intel/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-4.17.0-rc1-00048-g21560e1" of type "text/plain" (123713 bytes)
View attachment "job-script" of type "text/plain" (6439 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (7072 bytes)
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