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 64acc0549fea1b404b88c1354813886364902488 Merge: 0856ad1 6456b00 Author: Stephen Rothwell AuthorDate: Fri May 16 16:27:24 2014 +1000 Merge branch 'akpm-current/current' Conflicts: arch/x86/kernel/apic/hw_nmi.c mm/memblock.c mm/memcontrol.c +-----------------------------------------------------+------------+------------+------------+---------------+ | | 0856ad1ef1 | 6456b00c4f | 64acc0549f | next-20140516 | +-----------------------------------------------------+------------+------------+------------+---------------+ | boot_successes | 60 | 60 | 0 | 0 | | boot_failures | 0 | 0 | 20 | 13 | | WARNING:CPU:PID:at_kernel/irq/manage.c:__free_irq() | 0 | 0 | 20 | 13 | | backtrace:acpi_terminate | 0 | 0 | 20 | 13 | | backtrace:acpi_init | 0 | 0 | 20 | 13 | | backtrace:kernel_init_freeable | 0 | 0 | 20 | 13 | +-----------------------------------------------------+------------+------------+------------+---------------+ [ 0.947668] ACPI: Added _OSI(Processor Aggregator Device) [ 0.951373] ACPI: Unable to start the ACPI Interpreter [ 0.954908] ------------[ cut here ]------------ [ 0.958496] WARNING: CPU: 0 PID: 1 at kernel/irq/manage.c:1325 __free_irq+0x10b/0x3c3() [ 0.960000] Trying to free already-free IRQ 9 [ 0.960000] Modules linked in: [ 0.960000] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.15.0-rc5-06386-g64acc05 #1 [ 0.960000] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 0.960000] 0000000000000000 ffff88001150bc90 ffffffff8160618b ffff88001150bcd8 [ 0.960000] ffff88001150bcc8 ffffffff8105c54f ffffffff810ca9d7 0000000000000000 [ 0.960000] ffff8800000914a0 0000000000000009 ffffffff81315f00 ffff88001150bd28 [ 0.960000] Call Trace: [ 0.960000] [] dump_stack+0xa1/0x124 [ 0.960000] [] warn_slowpath_common+0xb0/0xde [ 0.960000] [] ? __free_irq+0x10b/0x3c3 [ 0.960000] [] ? acpi_map_lookup+0x3/0x63 [ 0.960000] [] warn_slowpath_fmt+0x5a/0x63 [ 0.960000] [] ? _raw_spin_lock_irqsave+0xd2/0xeb [ 0.960000] [] ? __free_irq+0xd6/0x3c3 [ 0.960000] [] __free_irq+0x10b/0x3c3 [ 0.960000] [] ? acpi_os_drop_map_ref+0x57/0x57 [ 0.960000] [] ? acpi_os_drop_map_ref+0x57/0x57 [ 0.960000] [] free_irq+0x167/0x197 [ 0.960000] [] ? acpi_sleep_init+0x154/0x154 [ 0.960000] [] acpi_os_remove_interrupt_handler+0x33/0x49 [ 0.960000] [] acpi_ev_remove_all_sci_handlers+0x26/0x9e [ 0.960000] [] ? acpi_sleep_init+0x154/0x154 [ 0.960000] [] acpi_ev_terminate+0xcc/0x15f [ 0.960000] [] ? acpi_sleep_init+0x154/0x154 [ 0.960000] [] acpi_ut_subsystem_shutdown+0x1a/0xf5 [ 0.960000] [] ? acpi_sleep_init+0x154/0x154 [ 0.960000] [] acpi_terminate+0x56/0x77 [ 0.960000] [] acpi_init+0x39b/0x3c3 [ 0.960000] [] ? do_one_initcall+0xd2/0x2c1 [ 0.960000] [] ? kfree+0xe8/0x17b [ 0.960000] [] ? acpi_sleep_init+0x154/0x154 [ 0.960000] [] ? acpi_sleep_init+0x154/0x154 [ 0.960000] [] do_one_initcall+0x183/0x2c1 [ 0.960000] [] ? parameq+0x29/0x32 [ 0.960000] [] ? parse_args+0x29a/0x3e8 [ 0.960000] [] kernel_init_freeable+0x1e9/0x2dc [ 0.960000] [] ? do_early_param+0xd7/0xd7 [ 0.960000] [] ? rest_init+0x15e/0x15e [ 0.960000] [] kernel_init+0x15/0x17a [ 0.960000] [] ret_from_fork+0x7c/0xb0 [ 0.960000] [] ? rest_init+0x15e/0x15e [ 0.960000] ---[ end trace adcd8b06ce955289 ]--- [ 0.980636] vgaarb: loaded git bisect start 4151fa6adc65da14673ece623bbb2acc6936f8be 0856ad1ef175c45dc6a0bc629ca355fdfbb1001e -- git bisect bad 64acc0549fea1b404b88c1354813886364902488 # 20:10 0- 1 Merge branch 'akpm-current/current' git bisect good 894878f70476deaca209750445d5c6d370180a43 # 20:14 20+ 0 mm-use-the-light-version-__mod_zone_page_state-in-mlocked_vma_newpage-checkpatch-fixes git bisect good 1578d82c1dfd0faa67229a41aad15db5783db440 # 20:20 20+ 0 rtc: rtc-ds1742: make of_device_id array const git bisect good 9588c229c1e48d024a7ef34af489f576a395adf6 # 20:24 20+ 0 smp-print-more-useful-debug-info-upon-receiving-ipi-on-an-offline-cpu-fix git bisect good 146494976f9be2f0e38a291abe41f33f368a530e # 20:29 20+ 0 kernel/profile.c: use static const char instead of static char git bisect good e217856eed37885172ae6762a78a6fad8a02b960 # 20:34 20+ 0 ipc,shm: document new limits in the uapi header git bisect good 98495af6a9ea22abc87ef5f800267f1536a3426f # 20:40 20+ 0 lib/scatterlist: make ARCH_HAS_SG_CHAIN an actual Kconfig git bisect good 29bfc4afc4fe1f9337dc60e19015af02867c1844 # 20:45 20+ 0 lib/scatterlist: clean up useless architecture versions of scatterlist.h git bisect good d66cd3b40705c5873f81621a530d05b60544aee8 # 20:50 20+ 0 sysrq: rcu-ify __handle_sysrq git bisect good 6456b00c4f4ac3774506ff54242a8849172cb650 # 20:55 20+ 0 sysrq,rcu: suppress RCU stall warnings while sysrq runs # first bad commit: [64acc0549fea1b404b88c1354813886364902488] Merge branch 'akpm-current/current' git bisect good 0856ad1ef175c45dc6a0bc629ca355fdfbb1001e # 20:58 60+ 0 Merge branch 'rd-docs/master' git bisect good 6456b00c4f4ac3774506ff54242a8849172cb650 # 21:00 60+ 0 sysrq,rcu: suppress RCU stall warnings while sysrq runs git bisect bad 4151fa6adc65da14673ece623bbb2acc6936f8be # 21:00 0- 13 Add linux-next specific files for 20140516 git bisect good 14186fea0cb06bc43181ce239efe0df6f1af260a # 21:05 60+ 0 Merge tag 'locks-v3.15-4' of git://git.samba.org/jlayton/linux git bisect bad 4151fa6adc65da14673ece623bbb2acc6936f8be # 21:05 0- 13 Add linux-next specific files for 20140516 This script may reproduce the error. ----------------------------------------------------------------------------- #!/bin/bash kernel=$1 kvm=( qemu-system-x86_64 -cpu kvm64 -enable-kvm -kernel $kernel -smp 2 -m 256M -net nic,vlan=0,macaddr=00:00:00:00:00:00,model=virtio -net user,vlan=0 -net nic,vlan=1,model=e1000 -net user,vlan=1 -boot order=nc -no-reboot -watchdog i6300esb -serial stdio -display none -monitor null ) append=( debug sched_debug apic=debug ignore_loglevel sysrq_always_enabled panic=10 prompt_ramdisk=0 earlyprintk=ttyS0,115200 console=ttyS0,115200 console=tty0 vga=normal root=/dev/ram0 rw ) "${kvm[@]}" --append "${append[*]}" ----------------------------------------------------------------------------- Thanks, Fengguang