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Date: Wed, 18 Mar 2015 16:15:07 +0800
From: Huang Ying <ying.huang@...el.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>
Subject: [LKP] [lockdep] ef9db2383c7: WARNING: CPU: 0 PID: 1 at
kernel/locking/lockdep.c:3538 check_flags+0x22d/0x240()
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git locking/urgent
commit ef9db2383c74a9cc0f7f4e0ec2740c865f6532d9 ("lockdep: Fix module unload")
+----------------------------------------------------+----------+------------+
| | v4.0-rc4 | ef9db2383c |
+----------------------------------------------------+----------+------------+
| boot_successes | 104 | 0 |
| boot_failures | 4 | 10 |
| BUG:kernel_boot_hang | 4 | |
| WARNING:at_kernel/locking/lockdep.c:#check_flags() | 0 | 10 |
| backtrace:rcu_read_lock_held | 0 | 10 |
| backtrace:lockdep_init_map | 0 | 10 |
| backtrace:__alloc_workqueue_key | 0 | 10 |
| backtrace:init_workqueues | 0 | 10 |
| backtrace:kernel_init_freeable | 0 | 10 |
+----------------------------------------------------+----------+------------+
[ 0.039021] Performance Events: Broken PMU hardware detected, using software events only.
[ 0.041003] Failed to access perfctr msr (MSR c1 is 0)
[ 0.043211] ------------[ cut here ]------------
[ 0.043778] WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:3538 check_flags+0x22d/0x240()
[ 0.044000] DEBUG_LOCKS_WARN_ON(current->hardirqs_enabled)
[ 0.044000] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.0.0-rc4-01920-g5d82bf5 #278
[ 0.044000] ffffffff82136e10 ffff88001495bb88 ffffffff81da3073 000000000000002e
[ 0.044000] ffff88001495bbd8 ffff88001495bbc8 ffffffff810d1e0b 0000000000000286
[ 0.044000] ffffffff82441420 0000000000000046 ffffffff827c53f1 ffff88001496e850
[ 0.044000] Call Trace:
[ 0.044000] [<ffffffff81da3073>] dump_stack+0x4f/0x7b
[ 0.044000] [<ffffffff810d1e0b>] warn_slowpath_common+0x7b/0xc0
[ 0.044000] [<ffffffff810d1eb1>] warn_slowpath_fmt+0x41/0x50
[ 0.044000] [<ffffffff810f7941>] ? get_parent_ip+0x11/0x50
[ 0.044000] [<ffffffff8111659d>] check_flags+0x22d/0x240
[ 0.044000] [<ffffffff81117636>] lock_is_held+0x36/0x90
[ 0.044000] [<ffffffff81129ce5>] rcu_read_lock_held+0x65/0x70
[ 0.044000] [<ffffffff81117d16>] lockdep_init_map+0x336/0x6f0
[ 0.044000] [<ffffffff810ea82f>] alloc_unbound_pwq+0x26f/0x4d0
[ 0.044000] [<ffffffff810eb484>] apply_workqueue_attrs+0x154/0x490
[ 0.044000] [<ffffffff810ebf44>] __alloc_workqueue_key+0x1c4/0x610
[ 0.044000] [<ffffffff81661368>] ? alloc_cpumask_var_node+0x48/0x80
[ 0.044000] [<ffffffff826554d8>] init_workqueues+0x414/0x528
[ 0.044000] [<ffffffff826550c4>] ? wq_sysfs_init+0x14/0x14
[ 0.044000] [<ffffffff826550c4>] ? wq_sysfs_init+0x14/0x14
[ 0.044000] [<ffffffff82640071>] do_one_initcall+0xe8/0x17f
[ 0.044000] [<ffffffff8264c55a>] ? native_smp_prepare_cpus+0x2c0/0x2cf
[ 0.044000] [<ffffffff8264017c>] kernel_init_freeable+0x74/0x1b0
[ 0.044000] [<ffffffff81d973e0>] ? rest_init+0x140/0x140
[ 0.044000] [<ffffffff81d973e9>] kernel_init+0x9/0xf0
[ 0.044000] [<ffffffff81db4943>] ret_from_fork+0x53/0x90
[ 0.044000] [<ffffffff81d973e0>] ? rest_init+0x140/0x140
[ 0.044000] ---[ end trace c79ceaf7cc379335 ]---
[ 0.044000] possible reason: unannotated irqs-off.
Thanks,
Ying Huang
View attachment "config-4.0.0-rc4-00001-gef9db23" of type "text/plain" (91118 bytes)
View attachment ".dmesg" of type "text/plain" (34486 bytes)
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