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Date: Tue, 21 Apr 2015 16:07:50 +0800
From: Huang Ying <ying.huang@...el.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>
Subject: [LKP] [kernel/printk/printk.c] d18bbc215f8: Out of memory: Kill
process 457 (rc) score 7 or sacrifice child
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit d18bbc215f81710e1eab7120becafa910554d68d ("kernel/printk/printk.c: revert "printk: enable interrupts before calling console_trylock_for_printk()"")
+----------------------------------------------------+------------+------------+
| | e84f1ab33c | d18bbc215f |
+----------------------------------------------------+------------+------------+
| boot_successes | 0 | 6 |
| boot_failures | 32 | 24 |
| BUG:spinlock_lockup_suspected_on_CPU | 32 | |
| INFO:possible_circular_locking_dependency_detected | 32 | |
| INFO:rcu_preempt_self-detected_stall_on_CPU | 31 | |
| RIP:flat_send_IPI_mask | 31 | |
| backtrace:do_sys_open | 32 | 7 |
| backtrace:SyS_open | 32 | |
| backtrace:kernel_init_freeable | 32 | |
| backtrace:print_ICs | 32 | |
| backtrace:setup_default_timer_irq | 32 | |
| backtrace:hpet_time_init | 32 | |
| backtrace:x86_late_time_init | 32 | |
| Out_of_memory:Kill_process | 0 | 24 |
| backtrace:compat_SyS_open | 0 | 7 |
| backtrace:sock_create | 0 | 4 |
| backtrace:SyS_socket | 0 | 5 |
| backtrace:compat_SyS_socketcall | 0 | 5 |
| page_allocation_failure:order:#,mode | 0 | 2 |
| backtrace:vmalloc | 0 | 2 |
| backtrace:SyS_init_module | 0 | 2 |
| WDT_device_closed_unexpectedly.WDT_will_not_stop | 0 | 3 |
| backtrace:do_fork | 0 | 4 |
| backtrace:SyS_clone | 0 | 3 |
| backtrace:__mm_populate | 0 | 4 |
| backtrace:SyS_mlockall | 0 | 4 |
| backtrace:compat_SyS_openat | 0 | 1 |
| backtrace:sock_alloc_file | 0 | 1 |
+----------------------------------------------------+------------+------------+
We found the commit fixed the problem in the parent commit as below (attached as
dmesg_of_the_parent_commit).
[ 2.530427] BUG: spinlock lockup suspected on CPU#0, swapper/1
[ 2.530427] lock: serial8250_ports+0x0/0x700, .magic: dead4ead, .owner: swapper/1, .owner_cpu: 0
[ 2.530427] CPU: 0 PID: 1 Comm: swapper Not tainted 3.16.0-rc3-00074-ge84f1ab #16
[ 2.530427] 0000000000000000 ffff8800003b7650 ffffffff816d97b8 ffff8800003b7670
[ 2.530427] ffffffff810989a0 ffffffff82dc7d80 00000000a08baba0 ffff8800003b7698
[ 2.530427] ffffffff81098b35 ffffffff82dc7d80 0000000000000046 0000000000000000
[ 2.530427] Call Trace:
[ 2.530427] [<ffffffff816d97b8>] dump_stack+0x19/0x1b
[ 2.530427] [<ffffffff810989a0>] spin_dump+0x90/0x95
[ 2.530427] [<ffffffff81098b35>] do_raw_spin_lock+0x108/0x128
[ 2.530427] [<ffffffff816e16ac>] _raw_spin_lock_irqsave+0x4f/0x5b
[ 2.530427] [<ffffffff813ca0ac>] ? serial8250_console_write+0xaf/0x15b
[ 2.530427] [<ffffffff813ca0ac>] serial8250_console_write+0xaf/0x15b
[ 2.530427] [<ffffffff8109d72d>] call_console_drivers+0xc6/0x175
[ 2.530427] [<ffffffff8109e7e8>] console_unlock+0x2e2/0x3ca
[ 2.530427] [<ffffffff8109ed5b>] vprintk_emit+0x48b/0x49f
[ 2.530427] [<ffffffff816d78eb>] printk+0x4f/0x57
[ 2.530427] [<ffffffff816d6f65>] print_circular_bug_header+0x3c/0xd8
[ 2.530427] [<ffffffff816d707f>] print_circular_bug+0x7e/0x2bf
[ 2.530427] [<ffffffff810951fc>] __lock_acquire+0x13dd/0x1a6d
[ 2.530427] [<ffffffff810a0200>] ? irq_alloc_hwirqs+0x95/0x95
[ 2.530427] [<ffffffff81095252>] ? __lock_acquire+0x1433/0x1a6d
[ 2.530427] [<ffffffff81095f8d>] lock_acquire+0xc6/0x1a9
[ 2.530427] [<ffffffff81095f8d>] ? lock_acquire+0xc6/0x1a9
[ 2.530427] [<ffffffff810a02aa>] ? __irq_get_desc_lock+0x8a/0x9a
[ 2.530427] [<ffffffff816e16a4>] _raw_spin_lock_irqsave+0x47/0x5b
[ 2.530427] [<ffffffff810a02aa>] ? __irq_get_desc_lock+0x8a/0x9a
[ 2.530427] [<ffffffff810a02aa>] __irq_get_desc_lock+0x8a/0x9a
[ 2.530427] [<ffffffff810a15c3>] __disable_irq_nosync+0x23/0x56
[ 2.530427] [<ffffffff810a1604>] disable_irq_nosync+0xe/0x10
[ 2.530427] [<ffffffff813cc1c1>] serial8250_startup+0x287/0x771
[ 2.530427] [<ffffffff813c8496>] uart_startup+0x9a/0x1b8
[ 2.530427] [<ffffffff813c8e7e>] uart_open+0x11f/0x164
[ 2.530427] [<ffffffff813b83dd>] tty_open+0x3f9/0x633
[ 2.530427] [<ffffffff81157d10>] chrdev_open+0x135/0x149
[ 2.530427] [<ffffffff81157bdb>] ? cdev_put+0x15/0x15
[ 2.530427] [<ffffffff81151d9a>] do_dentry_open+0x2d7/0x386
[ 2.530427] [<ffffffff81151e99>] finish_open+0x50/0x64
[ 2.530427] [<ffffffff81161d17>] do_last+0x974/0xc2a
[ 2.530427] [<ffffffff8116229c>] path_openat+0x2cf/0x782
[ 2.530427] [<ffffffff8116372e>] do_filp_open+0x4b/0xf1
[ 2.530427] [<ffffffff816e17a9>] ? _raw_spin_unlock+0x47/0x53
[ 2.530427] [<ffffffff81171c00>] ? __alloc_fd+0x155/0x167
[ 2.530427] [<ffffffff81152e15>] do_sys_open+0x166/0x20e
[ 2.530427] [<ffffffff81152e15>] ? do_sys_open+0x166/0x20e
[ 2.530427] [<ffffffff813db22b>] ? random_int_secret_init+0x1a/0x1e
[ 2.530427] [<ffffffff81152edb>] SyS_open+0x1e/0x20
[ 2.530427] [<ffffffff81fed20c>] kernel_init_freeable+0x1ec/0x255
[ 2.530427] [<ffffffff816d48ed>] ? rest_init+0x131/0x131
[ 2.530427] [<ffffffff816d48fb>] kernel_init+0xe/0xda
[ 2.530427] [<ffffffff816e243a>] ret_from_fork+0x7a/0xb0
[ 2.530427] [<ffffffff816d48ed>] ? rest_init+0x131/0x131
Thanks,
Ying Huang
View attachment "config-3.16.0-rc3-00075-gd18bbc2" of type "text/plain" (96073 bytes)
View attachment "dmesg_of_the_commit" of type "text/plain" (163505 bytes)
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View attachment "dmesg_of_the_parent_commit" of type "text/plain" (88766 bytes)
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