Hi Xiaolong, I can't find : commit 86d68266c6210a86a0e69f6cf242803609aba19b ("sched: fix first task of a task group is attached twice") on my git tree but only: commit a812206263c4c4c84bf9b6f038a732b4d09dd9f0 ("sched: fix first task of a task group is attached twice") It seems that you have tested an old version of the commit and the new one should fix the problem

Thanks, Vincent On 2 June 2016 at 08:23, kernel test robot <xiaolong.ye(a)intel.com&gt; wrote: > > > FYI, we noticed the following commit: > > https://git.linaro.org/people/vincent.guittot/kernel.git sched/pelt > commit 86d68266c6210a86a0e69f6cf242803609aba19b ("sched: fix first task of a task group is attached twice") > > > on test machine: vm-kbuild-yocto-i386: 2 threads qemu-system-i386 -enable-kvm with 320M memory > > caused below changes: > > > +----------------------------------------------------------------+------------+------------+ > | | ef0491ea17 | 86d68266c6 | > +----------------------------------------------------------------+------------+------------+ > | boot_successes | 12 | 0 | > | boot_failures | 7 | 21 | > | BUG:workqueue_lockup-pool_cpus=#node=#flags=#nice=#stuck_for#s | 3 | | > | IP-Config:Auto-configuration_of_network_failed | 4 | | > | BUG:kernel_test_hang | 0 | 10 | > | BUG:spinlock_lockup_suspected_on_CPU | 0 | 11 | > | EIP_is_at_set_task_rq_fair | 0 | 11 | > | EIP_is_at__default_send_IPI_dest_field | 0 | 11 | > | backtrace:schedule_timeout | 0 | 1 | > | backtrace:torture_shuffle | 0 | 3 | > | backtrace:cpu_startup_entry | 0 | 2 | > | backtrace:smpboot_thread_fn | 0 | 1 | > +----------------------------------------------------------------+------------+------------+ > > > > [ 69.565670] Freeing unused kernel memory: 2248K (cabf9000 - cae2b000) > [ 69.570234] Write protecting the kernel text: 18844k > [ 69.615691] Write protecting the kernel read-only data: 6820k > [ 69.633606] BUG: spinlock lockup suspected on CPU#1, rcu_sched/7 > [ 69.633606] lock: 0xd36ba980, .magic: dead4ead, .owner: init/1, .owner_cpu: 0 > [ 69.633606] CPU: 1 PID: 7 Comm: rcu_sched Not tainted 4.6.0-rc7-00127-g86d6826 #1 > [ 69.633606] 00000000 c0059cd4 c9433829 c00303a4 d36ba980 c0059d00 c90fffd7 ca79453c > [ 69.633606] d36ba980 dead4ead c00303a4 00000001 00000000 d36ba980 a08bb370 00000000 > [ 69.633606] c0059d1c c910036a a08bb370 00000000 d36ba990 d36ba980 00000046 c0059d40 > [ 69.633606] Call Trace: > [ 69.633606] [<c9433829>] dump_stack+0x162/0x1f9 > [ 69.633606] [<c90fffd7>] spin_dump+0xe7/0x160 > [ 69.633606] [<c910036a>] do_raw_spin_lock+0x21a/0x330 > [ 69.633606] [<ca263581>] _raw_spin_lock_irqsave+0x131/0x180 > [ 69.633606] [<c90cebd3>] ? load_balance+0x3e3/0x10d0 > [ 69.633606] [<c90cebd3>] load_balance+0x3e3/0x10d0 > [ 69.633606] [<c904baea>] ? kvm_sched_clock_read+0x3a/0x70 > [ 69.633606] [<c9019766>] ? sched_clock+0x16/0x30 > [ 69.633606] [<c90c1bfd>] ? sched_clock_local+0x2d/0x1e0 > [ 69.633606] [<c90d08a7>] pick_next_task_fair+0x947/0xd50 > [ 69.633606] [<ca259808>] __schedule+0x778/0xd90 > [ 69.633606] [<c948adbc>] ? debug_object_activate+0x23c/0x370 > [ 69.633606] [<ca26250c>] ? schedule_timeout+0x21c/0x290 > [ 69.633606] [<ca259edd>] schedule+0x3d/0x80 > [ 69.633606] [<ca26252d>] schedule_timeout+0x23d/0x290 > [ 69.633606] [<c9130270>] ? detach_if_pending+0x120/0x120 > [ 69.633606] [<c9129aaf>] rcu_gp_kthread+0x85f/0x10f0 > [ 69.633606] [<c9129250>] ? force_qs_rnp+0x250/0x250 > [ 69.633606] [<c90a603c>] kthread+0x13c/0x150 > [ 69.633606] [<ca264e51>] ret_from_kernel_thread+0x21/0x40 > [ 69.633606] [<c90a5f00>] ? __kthread_unpark+0xf0/0xf0 > [ 69.633606] Sending NMI to all CPUs: > [ 69.633606] NMI backtrace for cpu 0 > [ 69.633606] CPU: 0 PID: 1 Comm: init Not tainted 4.6.0-rc7-00127-g86d6826 #1 > [ 69.633606] task: c0030000 ti: c0032000 task.ti: c0032000 > [ 69.633606] EIP: 0060:[<c90cc942>] EFLAGS: 00000046 CPU: 0 > [ 69.633606] EIP is at set_task_rq_fair+0xd2/0x420 > [ 69.633606] EAX: 00000000 EBX: 00000000 ECX: cf990d18 EDX: d36ba9d4 > [ 69.633606] ESI: 3664896f EDI: 00000010 EBP: c0033eec ESP: c0033eb8 > [ 69.633606] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 > [ 69.633606] CR0: 80050033 CR2: 47ef2e50 CR3: 1092dae0 CR4: 000006b0 > [ 69.633606] Stack: > [ 69.633606] c0030080 3664896f 00000010 00000000 00000000 00000000 00000000 00000001 > [ 69.633606] 00000010 00000010 c0030000 00000000 d0353e40 c0033f00 c90ccfcd c0030000 > [ 69.633606] d0353e40 d36ba980 c0033f28 c90c0c6a 00000002 00000001 c0030000 00000046 > [ 69.633606] Call Trace: > [ 69.633606] [<c90ccfcd>] task_move_group_fair+0x5d/0xe0 > [ 69.633606] [<c90c0c6a>] sched_move_task+0x1ca/0x370 > [ 69.633606] [<c90e0cbd>] autogroup_move_group+0x1bd/0x2b0 > [ 69.633606] [<c90e1062>] sched_autogroup_create_attach+0x232/0x380 > [ 69.633606] [<c90f41f7>] ? trace_hardirqs_on+0x27/0x40 > [ 69.633606] [<c908f521>] sys_setsid+0x1a1/0x1f0 > [ 69.633606] [<c9001e6f>] do_int80_syscall_32+0xbf/0x2d0 > [ 69.633606] [<ca264f6c>] entry_INT80_32+0x2c/0x2c > [ 69.633606] Code: 72 44 8b 7a 48 83 05 d8 67 e8 ca 01 83 15 dc 67 e8 ca 00 89 45 e8 8b 41 48 31 f3 89 75 d0 89 45 e4 8b 45 ec 89 7d d4 31 f8 09 c3 <75> b4 8b 75 dc 8b 7d d8 33 75 e8 33 7d e4 09 fe 75 a4 8b 5d cc > [ 69.633606] NMI backtrace for cpu 1 > [ 69.633606] CPU: 1 PID: 7 Comm: rcu_sched Not tainted 4.6.0-rc7-00127-g86d6826 #1 > [ 69.633606] task: c0056000 ti: c0058000 task.ti: c0058000 > [ 69.633606] EIP: 0060:[<c903bfe2>] EFLAGS: 00000046 CPU: 1 > [ 69.633606] EIP is at __default_send_IPI_dest_field+0x132/0x160 > [ 69.633606] EAX: 00001f81 EBX: 00000000 ECX: fffff000 EDX: 00000000 > [ 69.633606] ESI: 00000002 EDI: 00000c00 EBP: c0059cb4 ESP: c0059ca8 > [ 69.633606] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 > [ 69.633606] CR0: 80050033 CR2: 00000000 CR3: 0ae34000 CR4: 000006b0 > [ 69.633606] Stack: > [ 69.633606] 00000003 00000046 00000002 c0059cc8 c903c861 00002710 00000001 c903e570 > [ 69.633606] c0059cd0 c903e58f c0059cf8 c943b7f0 ca7c08de ca873dc7 d36ba980 dead4ead > [ 69.633606] c00303a4 d36ba980 a08bb370 00000000 c0059d00 c903e64e c0059d1c c9100382 > [ 69.633606] Call Trace: > [ 69.633606] [<c903c861>] default_send_IPI_mask_logical+0xd1/0x160 > [ 69.633606] [<c903e570>] ? irq_force_complete_move+0x1e0/0x1e0 > [ 69.633606] [<c903e58f>] nmi_raise_cpu_backtrace+0x1f/0x30 > [ 69.633606] [<c943b7f0>] nmi_trigger_all_cpu_backtrace+0x1b0/0x410 > [ 69.633606] [<c903e64e>] arch_trigger_all_cpu_backtrace+0x1e/0x30 > [ 69.633606] [<c9100382>] do_raw_spin_lock+0x232/0x330 > [ 69.633606] [<ca263581>] _raw_spin_lock_irqsave+0x131/0x180 > [ 69.633606] [<c90cebd3>] ? load_balance+0x3e3/0x10d0 > [ 69.633606] [<c90cebd3>] load_balance+0x3e3/0x10d0 > [ 69.633606] [<c904baea>] ? kvm_sched_clock_read+0x3a/0x70 > [ 69.633606] [<c9019766>] ? sched_clock+0x16/0x30 > [ 69.633606] [<c90c1bfd>] ? sched_clock_local+0x2d/0x1e0 > [ 69.633606] [<c90d08a7>] pick_next_task_fair+0x947/0xd50 > [ 69.633606] [<ca259808>] __schedule+0x778/0xd90 > [ 69.633606] [<c948adbc>] ? debug_object_activate+0x23c/0x370 > [ 69.633606] [<ca26250c>] ? schedule_timeout+0x21c/0x290 > [ 69.633606] [<ca259edd>] schedule+0x3d/0x80 > [ 69.633606] [<ca26252d>] schedule_timeout+0x23d/0x290 > [ 69.633606] [<c9130270>] ? detach_if_pending+0x120/0x120 > [ 69.633606] [<c9129aaf>] rcu_gp_kthread+0x85f/0x10f0 > [ 69.633606] [<c9129250>] ? force_qs_rnp+0x250/0x250 > [ 69.633606] [<c90a603c>] kthread+0x13c/0x150 > [ 69.633606] [<ca264e51>] ret_from_kernel_thread+0x21/0x40 > [ 69.633606] [<c90a5f00>] ? __kthread_unpark+0xf0/0xf0 > [ 69.633606] Code: 05 70 60 e5 ca 01 83 15 74 60 e5 ca 00 83 c1 01 83 d3 00 89 0d 68 5f e5 ca 89 1d 6c 5f e5 ca 8b 0d 18 a1 92 ca 89 b9 00 c3 ff ff <83> c0 01 83 d2 00 83 05 78 60 e5 ca 01 a3 70 5f e5 ca 5b 89 15 > > Elapsed time: 390 > qemu-system-i386 -enable-kvm -kernel /pkg/linux/i386-randconfig-b0-05262019/gcc-6/86d68266c6210a86a0e69f6cf242803609aba19b/vmlinuz-4.6.0-rc7-00127-g86d6826 -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-kbuild-yocto-i386-26/rand_boot-1-yocto-minimal-i386.cgz-i386-randconfig-b0-05262019-86d68266c6210a86a0e69f6cf242803609aba19b-20160527-100557-1afgxdi-0.yaml ARCH=i386 kconfig=i386-randconfig-b0-05262019 branch=linux-devel/devel-spot-201605261922 commit=86d68266c6210a86a0e69f6cf242803609aba19b BOOT_IMAGE=/pkg/linux/i386-randconfig-b0-05262019/gcc-6/86d68266c6210a86a0e69f6cf242803609aba19b/vmlinuz-4.6.0-rc7-00127-g86d6826 max_uptime=600 RESULT_ROOT=/result/boot/1/vm-kbuild-yocto-i386/yocto-minimal-i386.cgz/i386-randconfig-b0-05262019/gcc-6/86d68266c6210a86a0e69f6cf242803609aba19b/0 LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw ip=::::vm-kbuild-yocto-i386-26::dhcp drbd.minor_count=8' -initrd /fs/sdd1/initrd-vm-kbuild-yocto-i386-26 -m 320 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -drive file=/fs/sdd1/disk0-vm-kbuild-yocto-i386-26,media=disk,if=virtio -pidfile /dev/shm/kboot/pid-vm-kbuild-yocto-i386-26 -serial file:/dev/shm/kboot/serial-vm-kbuild-yocto-i386-26 -daemonize -display none -monitor null > > > FYI, raw QEMU command line is: > > qemu-system-i386 -enable-kvm -kernel /pkg/linux/i386-randconfig-b0-05262019/gcc-6/86d68266c6210a86a0e69f6cf242803609aba19b/vmlinuz-4.6.0-rc7-00127-g86d6826 -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-kbuild-yocto-i386-26/rand_boot-1-yocto-minimal-i386.cgz-i386-randconfig-b0-05262019-86d68266c6210a86a0e69f6cf242803609aba19b-20160527-100557-1afgxdi-0.yaml ARCH=i386 kconfig=i386-randconfig-b0-05262019 branch=linux-devel/devel-spot-201605261922 commit=86d68266c6210a86a0e69f6cf242803609aba19b BOOT_IMAGE=/pkg/linux/i386-randconfig-b0-05262019/gcc-6/86d68266c6210a86a0e69f6cf242803609aba19b/vmlinuz-4.6.0-rc7-00127-g86d6826 max_uptime=600 RESULT_ROOT=/result/boot/1/vm-kbuild-yocto-i386/yocto-minimal-i386.cgz/i386-randconfig-b0-05262019/gcc-6/86d68266c6210a86a0e69f6cf242803609aba19b/0 LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw ip=::::vm-kbuild-yocto-i386-26::dhcp drbd.minor_count=8' -initrd /fs/sdd1/initrd-vm-kbuild-yocto-i386-26 -m 320 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -drive file=/fs/sdd1/disk0-vm-kbuild-yocto-i386-26,media=disk,if=virtio -pidfile /dev/shm/kboot/pid-vm-kbuild-yocto-i386-26 -serial file:/dev/shm/kboot/serial-vm-kbuild-yocto-i386-26 -daemonize -display none -monitor null > > > > > > Thanks, > Xiaolong

On Thu, Jun 02, 2016 at 04:02:44PM +0800, Ye Xiaolong wrote: >On Thu, Jun 02, 2016 at 09:54:47AM +0200, Vincent Guittot wrote: >>Hi Xiaolong, >> >>I can't find : >>commit 86d68266c6210a86a0e69f6cf242803609aba19b ("sched: fix first >>task of a task group is attached twice") >>on my git tree but only: >>commit a812206263c4c4c84bf9b6f038a732b4d09dd9f0 ("sched: fix first >>task of a task group is attached twice") >> >>It seems that you have tested an old version of the commit and the new >>one should fix the problem > >Thanks for the feedback, I will queue a new test with the new version of >the commit. Hi, Vincent Just ran 2 times boot test with your new version commit, and no kernel panic found. Tested-by: Xiaolong Ye <xiaolong.ye(a)intel.com&gt;

Thanks, Xiaolong > >Thanks, >Xiaolong > >> >>Thanks, >>Vincent >> >>On 2 June 2016 at 08:23, kernel test robot <xiaolong.ye(a)intel.com&gt; wrote: >>> >>> >>> FYI, we noticed the following commit: >>> >>> https://git.linaro.org/people/vincent.guittot/kernel.git sched/pelt >>> commit 86d68266c6210a86a0e69f6cf242803609aba19b ("sched: fix first task of a task group is attached twice") >>> >>> >>> on test machine: vm-kbuild-yocto-i386: 2 threads qemu-system-i386 -enable-kvm with 320M memory >>> >>> caused below changes: >>> >>> >>> +----------------------------------------------------------------+------------+------------+ >>> | | ef0491ea17 | 86d68266c6 | >>> +----------------------------------------------------------------+------------+------------+ >>> | boot_successes | 12 | 0 | >>> | boot_failures | 7 | 21 | >>> | BUG:workqueue_lockup-pool_cpus=#node=#flags=#nice=#stuck_for#s | 3 | | >>> | IP-Config:Auto-configuration_of_network_failed | 4 | | >>> | BUG:kernel_test_hang | 0 | 10 | >>> | BUG:spinlock_lockup_suspected_on_CPU | 0 | 11 | >>> | EIP_is_at_set_task_rq_fair | 0 | 11 | >>> | EIP_is_at__default_send_IPI_dest_field | 0 | 11 | >>> | backtrace:schedule_timeout | 0 | 1 | >>> | backtrace:torture_shuffle | 0 | 3 | >>> | backtrace:cpu_startup_entry | 0 | 2 | >>> | backtrace:smpboot_thread_fn | 0 | 1 | >>> +----------------------------------------------------------------+------------+------------+ >>> >>> >>> >>> [ 69.565670] Freeing unused kernel memory: 2248K (cabf9000 - cae2b000) >>> [ 69.570234] Write protecting the kernel text: 18844k >>> [ 69.615691] Write protecting the kernel read-only data: 6820k >>> [ 69.633606] BUG: spinlock lockup suspected on CPU#1, rcu_sched/7 >>> [ 69.633606] lock: 0xd36ba980, .magic: dead4ead, .owner: init/1, .owner_cpu: 0 >>> [ 69.633606] CPU: 1 PID: 7 Comm: rcu_sched Not tainted 4.6.0-rc7-00127-g86d6826 #1 >>> [ 69.633606] 00000000 c0059cd4 c9433829 c00303a4 d36ba980 c0059d00 c90fffd7 ca79453c >>> [ 69.633606] d36ba980 dead4ead c00303a4 00000001 00000000 d36ba980 a08bb370 00000000 >>> [ 69.633606] c0059d1c c910036a a08bb370 00000000 d36ba990 d36ba980 00000046 c0059d40 >>> [ 69.633606] Call Trace: >>> [ 69.633606] [<c9433829>] dump_stack+0x162/0x1f9 >>> [ 69.633606] [<c90fffd7>] spin_dump+0xe7/0x160 >>> [ 69.633606] [<c910036a>] do_raw_spin_lock+0x21a/0x330 >>> [ 69.633606] [<ca263581>] _raw_spin_lock_irqsave+0x131/0x180 >>> [ 69.633606] [<c90cebd3>] ? load_balance+0x3e3/0x10d0 >>> [ 69.633606] [<c90cebd3>] load_balance+0x3e3/0x10d0 >>> [ 69.633606] [<c904baea>] ? kvm_sched_clock_read+0x3a/0x70 >>> [ 69.633606] [<c9019766>] ? sched_clock+0x16/0x30 >>> [ 69.633606] [<c90c1bfd>] ? sched_clock_local+0x2d/0x1e0 >>> [ 69.633606] [<c90d08a7>] pick_next_task_fair+0x947/0xd50 >>> [ 69.633606] [<ca259808>] __schedule+0x778/0xd90 >>> [ 69.633606] [<c948adbc>] ? debug_object_activate+0x23c/0x370 >>> [ 69.633606] [<ca26250c>] ? schedule_timeout+0x21c/0x290 >>> [ 69.633606] [<ca259edd>] schedule+0x3d/0x80 >>> [ 69.633606] [<ca26252d>] schedule_timeout+0x23d/0x290 >>> [ 69.633606] [<c9130270>] ? detach_if_pending+0x120/0x120 >>> [ 69.633606] [<c9129aaf>] rcu_gp_kthread+0x85f/0x10f0 >>> [ 69.633606] [<c9129250>] ? force_qs_rnp+0x250/0x250 >>> [ 69.633606] [<c90a603c>] kthread+0x13c/0x150 >>> [ 69.633606] [<ca264e51>] ret_from_kernel_thread+0x21/0x40 >>> [ 69.633606] [<c90a5f00>] ? __kthread_unpark+0xf0/0xf0 >>> [ 69.633606] Sending NMI to all CPUs: >>> [ 69.633606] NMI backtrace for cpu 0 >>> [ 69.633606] CPU: 0 PID: 1 Comm: init Not tainted 4.6.0-rc7-00127-g86d6826 #1 >>> [ 69.633606] task: c0030000 ti: c0032000 task.ti: c0032000 >>> [ 69.633606] EIP: 0060:[<c90cc942>] EFLAGS: 00000046 CPU: 0 >>> [ 69.633606] EIP is at set_task_rq_fair+0xd2/0x420 >>> [ 69.633606] EAX: 00000000 EBX: 00000000 ECX: cf990d18 EDX: d36ba9d4 >>> [ 69.633606] ESI: 3664896f EDI: 00000010 EBP: c0033eec ESP: c0033eb8 >>> [ 69.633606] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 >>> [ 69.633606] CR0: 80050033 CR2: 47ef2e50 CR3: 1092dae0 CR4: 000006b0 >>> [ 69.633606] Stack: >>> [ 69.633606] c0030080 3664896f 00000010 00000000 00000000 00000000 00000000 00000001 >>> [ 69.633606] 00000010 00000010 c0030000 00000000 d0353e40 c0033f00 c90ccfcd c0030000 >>> [ 69.633606] d0353e40 d36ba980 c0033f28 c90c0c6a 00000002 00000001 c0030000 00000046 >>> [ 69.633606] Call Trace: >>> [ 69.633606] [<c90ccfcd>] task_move_group_fair+0x5d/0xe0 >>> [ 69.633606] [<c90c0c6a>] sched_move_task+0x1ca/0x370 >>> [ 69.633606] [<c90e0cbd>] autogroup_move_group+0x1bd/0x2b0 >>> [ 69.633606] [<c90e1062>] sched_autogroup_create_attach+0x232/0x380 >>> [ 69.633606] [<c90f41f7>] ? trace_hardirqs_on+0x27/0x40 >>> [ 69.633606] [<c908f521>] sys_setsid+0x1a1/0x1f0 >>> [ 69.633606] [<c9001e6f>] do_int80_syscall_32+0xbf/0x2d0 >>> [ 69.633606] [<ca264f6c>] entry_INT80_32+0x2c/0x2c >>> [ 69.633606] Code: 72 44 8b 7a 48 83 05 d8 67 e8 ca 01 83 15 dc 67 e8 ca 00 89 45 e8 8b 41 48 31 f3 89 75 d0 89 45 e4 8b 45 ec 89 7d d4 31 f8 09 c3 <75> b4 8b 75 dc 8b 7d d8 33 75 e8 33 7d e4 09 fe 75 a4 8b 5d cc >>> [ 69.633606] NMI backtrace for cpu 1 >>> [ 69.633606] CPU: 1 PID: 7 Comm: rcu_sched Not tainted 4.6.0-rc7-00127-g86d6826 #1 >>> [ 69.633606] task: c0056000 ti: c0058000 task.ti: c0058000 >>> [ 69.633606] EIP: 0060:[<c903bfe2>] EFLAGS: 00000046 CPU: 1 >>> [ 69.633606] EIP is at __default_send_IPI_dest_field+0x132/0x160 >>> [ 69.633606] EAX: 00001f81 EBX: 00000000 ECX: fffff000 EDX: 00000000 >>> [ 69.633606] ESI: 00000002 EDI: 00000c00 EBP: c0059cb4 ESP: c0059ca8 >>> [ 69.633606] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 >>> [ 69.633606] CR0: 80050033 CR2: 00000000 CR3: 0ae34000 CR4: 000006b0 >>> [ 69.633606] Stack: >>> [ 69.633606] 00000003 00000046 00000002 c0059cc8 c903c861 00002710 00000001 c903e570 >>> [ 69.633606] c0059cd0 c903e58f c0059cf8 c943b7f0 ca7c08de ca873dc7 d36ba980 dead4ead >>> [ 69.633606] c00303a4 d36ba980 a08bb370 00000000 c0059d00 c903e64e c0059d1c c9100382 >>> [ 69.633606] Call Trace: >>> [ 69.633606] [<c903c861>] default_send_IPI_mask_logical+0xd1/0x160 >>> [ 69.633606] [<c903e570>] ? irq_force_complete_move+0x1e0/0x1e0 >>> [ 69.633606] [<c903e58f>] nmi_raise_cpu_backtrace+0x1f/0x30 >>> [ 69.633606] [<c943b7f0>] nmi_trigger_all_cpu_backtrace+0x1b0/0x410 >>> [ 69.633606] [<c903e64e>] arch_trigger_all_cpu_backtrace+0x1e/0x30 >>> [ 69.633606] [<c9100382>] do_raw_spin_lock+0x232/0x330 >>> [ 69.633606] [<ca263581>] _raw_spin_lock_irqsave+0x131/0x180 >>> [ 69.633606] [<c90cebd3>] ? load_balance+0x3e3/0x10d0 >>> [ 69.633606] [<c90cebd3>] load_balance+0x3e3/0x10d0 >>> [ 69.633606] [<c904baea>] ? kvm_sched_clock_read+0x3a/0x70 >>> [ 69.633606] [<c9019766>] ? sched_clock+0x16/0x30 >>> [ 69.633606] [<c90c1bfd>] ? sched_clock_local+0x2d/0x1e0 >>> [ 69.633606] [<c90d08a7>] pick_next_task_fair+0x947/0xd50 >>> [ 69.633606] [<ca259808>] __schedule+0x778/0xd90 >>> [ 69.633606] [<c948adbc>] ? debug_object_activate+0x23c/0x370 >>> [ 69.633606] [<ca26250c>] ? schedule_timeout+0x21c/0x290 >>> [ 69.633606] [<ca259edd>] schedule+0x3d/0x80 >>> [ 69.633606] [<ca26252d>] schedule_timeout+0x23d/0x290 >>> [ 69.633606] [<c9130270>] ? detach_if_pending+0x120/0x120 >>> [ 69.633606] [<c9129aaf>] rcu_gp_kthread+0x85f/0x10f0 >>> [ 69.633606] [<c9129250>] ? force_qs_rnp+0x250/0x250 >>> [ 69.633606] [<c90a603c>] kthread+0x13c/0x150 >>> [ 69.633606] [<ca264e51>] ret_from_kernel_thread+0x21/0x40 >>> [ 69.633606] [<c90a5f00>] ? __kthread_unpark+0xf0/0xf0 >>> [ 69.633606] Code: 05 70 60 e5 ca 01 83 15 74 60 e5 ca 00 83 c1 01 83 d3 00 89 0d 68 5f e5 ca 89 1d 6c 5f e5 ca 8b 0d 18 a1 92 ca 89 b9 00 c3 ff ff <83> c0 01 83 d2 00 83 05 78 60 e5 ca 01 a3 70 5f e5 ca 5b 89 15 >>> >>> Elapsed time: 390 >>> qemu-system-i386 -enable-kvm -kernel /pkg/linux/i386-randconfig-b0-05262019/gcc-6/86d68266c6210a86a0e69f6cf242803609aba19b/vmlinuz-4.6.0-rc7-00127-g86d6826 -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-kbuild-yocto-i386-26/rand_boot-1-yocto-minimal-i386.cgz-i386-randconfig-b0-05262019-86d68266c6210a86a0e69f6cf242803609aba19b-20160527-100557-1afgxdi-0.yaml ARCH=i386 kconfig=i386-randconfig-b0-05262019 branch=linux-devel/devel-spot-201605261922 commit=86d68266c6210a86a0e69f6cf242803609aba19b BOOT_IMAGE=/pkg/linux/i386-randconfig-b0-05262019/gcc-6/86d68266c6210a86a0e69f6cf242803609aba19b/vmlinuz-4.6.0-rc7-00127-g86d6826 max_uptime=600 RESULT_ROOT=/result/boot/1/vm-kbuild-yocto-i386/yocto-minimal-i386.cgz/i386-randconfig-b0-05262019/gcc-6/86d68266c6210a86a0e69f6cf242803609aba19b/0 LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ > ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw ip=::::vm-kbuild-yocto-i386-26::dhcp drbd.minor_count=8' -initrd /fs/sdd1/initrd-vm-kbuild-yocto-i386-26 -m 320 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -drive file=/fs/sdd1/disk0-vm-kbuild-yocto-i386-26,media=disk,if=virtio -pidfile /dev/shm/kboot/pid-vm-kbuild-yocto-i386-26 -serial file:/dev/shm/kboot/serial-vm-kbuild-yocto-i386-26 -daemonize -display none -monitor null >>> >>> >>> FYI, raw QEMU command line is: >>> >>> qemu-system-i386 -enable-kvm -kernel /pkg/linux/i386-randconfig-b0-05262019/gcc-6/86d68266c6210a86a0e69f6cf242803609aba19b/vmlinuz-4.6.0-rc7-00127-g86d6826 -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-kbuild-yocto-i386-26/rand_boot-1-yocto-minimal-i386.cgz-i386-randconfig-b0-05262019-86d68266c6210a86a0e69f6cf242803609aba19b-20160527-100557-1afgxdi-0.yaml ARCH=i386 kconfig=i386-randconfig-b0-05262019 branch=linux-devel/devel-spot-201605261922 commit=86d68266c6210a86a0e69f6cf242803609aba19b BOOT_IMAGE=/pkg/linux/i386-randconfig-b0-05262019/gcc-6/86d68266c6210a86a0e69f6cf242803609aba19b/vmlinuz-4.6.0-rc7-00127-g86d6826 max_uptime=600 RESULT_ROOT=/result/boot/1/vm-kbuild-yocto-i386/yocto-minimal-i386.cgz/i386-randconfig-b0-05262019/gcc-6/86d68266c6210a86a0e69f6cf242803609aba19b/0 LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=pan > ic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw ip=::::vm-kbuild-yocto-i386-26::dhcp drbd.minor_count=8' -initrd /fs/sdd1/initrd-vm-kbuild-yocto-i386-26 -m 320 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -drive file=/fs/sdd1/disk0-vm-kbuild-yocto-i386-26,media=disk,if=virtio -pidfile /dev/shm/kboot/pid-vm-kbuild-yocto-i386-26 -serial file:/dev/shm/kboot/serial-vm-kbuild-yocto-i386-26 -daemonize -display none -monitor null >>> >>> >>> >>> >>> >>> Thanks, >>> Xiaolong >_______________________________________________ >LKP mailing list &gt;LKP(a)lists.01.org >https://lists.01.org/mailman/listinfo/lkp