Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit 68c90b2c635f18ad51ae7440162f6c082ea1288d
Merge: f08af6f ec11f8c
Author: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
AuthorDate: Mon Jun 23 14:12:48 2014 +1000
Merge branch 'akpm-current/current'
+---------------------------------+------------+------------+------------+---------------+
| | f08af6fa87 | ec11f8c81f | 68c90b2c63 | next-20140623 |
+---------------------------------+------------+------------+------------+---------------+
| boot_successes | 60 | 60 | 0 | 0 |
| boot_failures | 0 | 0 | 20 | 13 |
| kernel_BUG_at_kernel/irq_work.c | 0 | 0 | 20 | 13 |
| invalid_opcode | 0 | 0 | 20 | 13 |
| RIP:irq_work_run | 0 | 0 | 20 | 13 |
| backtrace:smpboot_thread_fn | 0 | 0 | 20 | 13 |
+---------------------------------+------------+------------+------------+---------------+
[ 2.194744] EDD information not available.
[ 2.195290] Unregister pv shared memory for cpu 0
[ 2.206025] ------------[ cut here ]------------
[ 2.206025] kernel BUG at kernel/irq_work.c:175!
[ 2.206025] invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC
[ 2.206025] CPU: 0 PID: 9 Comm: migration/0 Not tainted 3.16.0-rc2-02039-g68c90b2 #1
[ 2.206025] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 2.206025] task: ffff88001219a7e0 ti: ffff8800121a4000 task.ti: ffff8800121a4000
[ 2.206025] RIP: 0010:[<ffffffff810f9318>] [<ffffffff810f9318>] irq_work_run+0xf/0x1c
[ 2.206025] RSP: 0000:ffff8800121a7c48 EFLAGS: 00010046
[ 2.206025] RAX: 0000000080000001 RBX: 0000000000000000 RCX: 0000000000000005
[ 2.206025] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000
[ 2.206025] RBP: ffff8800121a7c68 R08: 0000000000000002 R09: 0000000000000001
[ 2.206025] R10: ffffffff810e2a10 R11: ffffffff810b9de3 R12: ffff880012412340
[ 2.206025] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff81c83e50
[ 2.206025] FS: 0000000000000000(0000) GS:ffff880012400000(0000) knlGS:0000000000000000
[ 2.206025] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 2.206025] CR2: 0000000000000000 CR3: 0000000001c0c000 CR4: 00000000000006b0
[ 2.206025] Stack:
[ 2.206025] ffffffff810e87e0 ffff880012412380 00000000fffffff0 ffffffff81c81ba0
[ 2.206025] ffff8800121a7c88 ffffffff810e88f0 0000000000000001 00000000fffffff0
[ 2.206025] ffff8800121a7cd0 ffffffff810b6e23 0000000000000000 0000000000000008
[ 2.206025] Call Trace:
[ 2.206025] [<ffffffff810e87e0>] ? flush_smp_call_function_queue+0xa4/0x107
[ 2.206025] [<ffffffff810e88f0>] hotplug_cfd+0xad/0xbb
[ 2.206025] [<ffffffff810b6e23>] notifier_call_chain+0x68/0x8e
[ 2.206025] [<ffffffff810b70c0>] __raw_notifier_call_chain+0x9/0xb
[ 2.206025] [<ffffffff8109b39e>] __cpu_notify+0x1b/0x32
[ 2.206025] [<ffffffff8109b3c3>] cpu_notify+0xe/0x10
[ 2.206025] [<ffffffff817e2817>] take_cpu_down+0x22/0x35
[ 2.206025] [<ffffffff810f4153>] multi_cpu_stop+0x8c/0xe2
[ 2.206025] [<ffffffff810f40c7>] ? cpu_stopper_thread+0x126/0x126
[ 2.206025] [<ffffffff810f402e>] cpu_stopper_thread+0x8d/0x126
[ 2.206025] [<ffffffff810cdab4>] ? lock_acquire+0x94/0x9d
[ 2.206025] [<ffffffff817f25af>] ? _raw_spin_unlock_irqrestore+0x40/0x55
[ 2.206025] [<ffffffff810cbdcd>] ? trace_hardirqs_on_caller+0x171/0x18d
[ 2.206025] [<ffffffff817f25b7>] ? _raw_spin_unlock_irqrestore+0x48/0x55
[ 2.206025] [<ffffffff810b8e39>] smpboot_thread_fn+0x182/0x1a0
[ 2.206025] [<ffffffff810b8cb7>] ? in_egroup_p+0x2e/0x2e
[ 2.206025] [<ffffffff810b372c>] kthread+0xcd/0xd5
[ 2.206025] [<ffffffff810b365f>] ? __kthread_parkme+0x5c/0x5c
[ 2.206025] [<ffffffff817f2f3c>] ret_from_fork+0x7c/0xb0
[ 2.206025] [<ffffffff810b365f>] ? __kthread_parkme+0x5c/0x5c
[ 2.206025] Code: 48 c7 c7 65 cd b0 81 e8 43 20 fa ff c6 05 50 e1 c9 00 01 eb 02 31 db 88 d8 5b 5d c3 65 8b 04 25 10 b8 00 00 a9 00 00 0f 00 75 02 <0f> 0b 55 48 89 e5 e8 b5 fd ff ff 5d c3 55 48 89 e5 53 48 89 fb
[ 2.206025] RIP [<ffffffff810f9318>] irq_work_run+0xf/0x1c
[ 2.206025] RSP <ffff8800121a7c48>
[ 2.206025] ---[ end trace f7f1564c3a1f35d0 ]---
[ 2.206025] note: migration/0[9] exited with preempt_count 1
git bisect start 58ae500a03a6bf68eee323c342431bfdd3f460b6 f08af6fa87ea33262fe2fe5167119fb55ad9dd2c --
git bisect bad 68c90b2c635f18ad51ae7440162f6c082ea1288d # 14:19 0- 20 Merge branch 'akpm-current/current'
git bisect good 6b11d02e25c79a8961983a966b7fafcdc36c7a91 # 14:23 20+ 0 slab: do not keep free objects/slabs on dead memcg caches
git bisect good 11709212b3a5479fcc63dda3160f4f4b0251f914 # 14:27 20+ 0 mm/util.c: add kstrimdup()
git bisect good 6af20930dcfcd13270de4f29f3830312f3c36a17 # 14:33 20+ 0 fork: reset mm->pinned_vm
git bisect good 8e7c32fb574ec1b49fd0e451cb25febf51430dd9 # 14:38 20+ 0 fs/qnx6: use pr_fmt and __func__ in logging
git bisect good 6873969c750b85734bc7d06be3c51ad381b3c85a # 14:41 20+ 0 shm: remove unneeded extern for function
git bisect good 2b9ed79abc340e15bc9652048d2e8d8a283bd8a1 # 14:48 20+ 0 um: use asm-generic/scatterlist.h
git bisect good ec11f8c81fbc76534c1374e29bdf36f085ed859a # 15:12 20+ 0 lib/scatterlist: clean up useless architecture versions of scatterlist.h
# first bad commit: [68c90b2c635f18ad51ae7440162f6c082ea1288d] Merge branch 'akpm-current/current'
git bisect good f08af6fa87ea33262fe2fe5167119fb55ad9dd2c # 15:14 60+ 0 Merge branch 'rd-docs/master'
git bisect good ec11f8c81fbc76534c1374e29bdf36f085ed859a # 15:19 60+ 0 lib/scatterlist: clean up useless architecture versions of scatterlist.h
git bisect bad 58ae500a03a6bf68eee323c342431bfdd3f460b6 # 15:19 0- 13 Add linux-next specific files for 20140623
git bisect good a497c3ba1d97fc69c1e78e7b96435ba8c2cb42ee # 15:25 60+ 0 Linux 3.16-rc2
git bisect bad 58ae500a03a6bf68eee323c342431bfdd3f460b6 # 15:25 0- 13 Add linux-next specific files for 20140623
This script may reproduce the error.
-----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
initrd=quantal-core-x86_64.cgz
wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/blob/master/initrd/$initrd
kvm=(
qemu-system-x86_64 -cpu kvm64 -enable-kvm
-kernel $kernel
-initrd $initrd
-smp 2
-m 256M
-net nic,vlan=0,macaddr=00:00:00:00:00:00,model=virtio
-net user,vlan=0
-net nic,vlan=1,model=e1000
-net user,vlan=1
-boot order=nc
-no-reboot
-watchdog i6300esb
-serial stdio
-display none
-monitor null
)
append=(
debug
sched_debug
apic=debug
ignore_loglevel
sysrq_always_enabled
panic=10
prompt_ramdisk=0
earlyprintk=ttyS0,115200
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
)
"${kvm[@]}" --append "${append[*]}"
-----------------------------------------------------------------------------
Thanks,
Fengguang
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