On 06/25/2014 03:01 PM, Fengguang Wu wrote: > Greetings, > > 0day kernel testing robot got the below dmesg and the first bad commit is > I think this is the same issue as the one reported by Stephen Warren here: https://lkml.org/lkml/2014/6/24/765 Peter Zijlstra is working on a fix for that. Regards, Srivatsa S. Bhat > 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 > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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