https://bugzilla.kernel.org/show_bug.cgi?id=69361 Bug ID: 69361 Summary: Host call trace and guest hang after create guest. Product: Virtualization Version: unspecified Kernel Version: 3.13.0 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: kvm Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx Reporter: chao.zhou@xxxxxxxxx Regression: No Environment: ------------ Host OS (ia32/ia32e/IA64):ia32e Guest OS (ia32/ia32e/IA64):ia32e Guest OS Type (Linux/Windows):Linux kvm.git Commit:c760f5e29d92adf5184589f1e616a4be146fb57c qemu.git Commit:732c66ce641c69702a7e7fdb73b68f0c1b583ab5 Host Kernel Version:3.13.0 Hardware:Ivytown_EP, Romley_EP Bug detailed description: -------------------------- when create a guest, the host will call trace and guest will hang/ note: 1.this should be a kernel bug kvm + qemu = result 7650b687 + 732c66ce = good c760f5e2 + 732c66ce = bad 2.I create guest 3 times, the bug will reproduce one time. Reproduce steps: ---------------- 1.start guest: qemu-system-x86_64 -enable-kvm -m 2048 -smp 2 -net none rhel6u4.img Current result: ---------------- guest hang, host call trace Expected result: ---------------- guest and host work fine Basic root-causing log: ---------------------- INFO: rcu_sched self-detected stall on CPUINFO: rcu_sched detected stalls on CPUs/tasks: { 0} (detected by 27, t=21004 jiffies, g=5092, c=5091, q=637) sending NMI to all CPUs: NMI backtrace for cpu 0 CPU: 0 PID: 10728 Comm: qemu-system-x86 Not tainted 3.13.0 #2 Hardware name: Intel Corporation S2600CP/S2600CP, BIOS SE5C600.86B.99.99.x056.071020121508 07/10/2012 task: ffff88043d192d20 ti: ffff880433ac2000 task.ti: ffff880433ac2000 RIP: 0010:[<ffffffff812427e5>] [<ffffffff812427e5>] delay_tsc+0x28/0x4b RSP: 0018:ffff8800bd003b88 EFLAGS: 00000097 RAX: 0000000028ee59d7 RBX: ffffffff81cae4d0 RCX: 0000000028ee58e7 RDX: 00000000000000f0 RSI: 0000000000000000 RDI: 0000000000000a86 RBP: ffff8800bd003b88 R08: 0000000000000000 R09: ffffffff81a91888 R10: 0000000000000001 R11: 0000000000000000 R12: 00000000000026de R13: 0000000000000060 R14: 0000000000000001 R15: 000000000000002a FS: 00007fb28ca2f700(0000) GS:ffff8800bd000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000043d4e2000 CR4: 00000000000427e0 Stack: ffff8800bd003b98 ffffffff81242856 ffff8800bd003bc8 ffffffff812d252d ffffffff81cae4d0 0000000000000000 ffffffff81cae4d0 0000000000000006 ffff8800bd003c18 ffffffff812d4511 ffffffff81bc3f80 00000005812405f4 Call Trace: <IRQ> [<ffffffff81242856>] __const_udelay+0x28/0x2a [<ffffffff812d252d>] wait_for_xmitr+0x46/0x8e [<ffffffff812d4511>] serial8250_console_write+0xbc/0xfc [<ffffffff8107c772>] call_console_drivers.clone.1+0xb4/0xc6 [<ffffffff8107c881>] console_cont_flush.clone.0+0xfd/0x114 [<ffffffff8107c8cf>] console_unlock+0x37/0x217 [<ffffffff8107cfbe>] vprintk_emit+0x3c3/0x3ec [<ffffffff8147d93d>] printk+0x48/0x4a [<ffffffff81084db9>] print_cpu_stall+0x25/0x129 [<ffffffff8108514c>] __rcu_pending+0x9f/0x1cc [<ffffffff8108533c>] rcu_check_callbacks+0xc3/0x144 [<ffffffff81047c86>] update_process_times+0x3c/0x65 [<ffffffff8108d975>] tick_sched_handle+0x45/0x54 [<ffffffff8108db36>] tick_sched_timer+0x58/0x77 [<ffffffff8105ad82>] __run_hrtimer+0xd6/0x161 [<ffffffff8108dade>] ? tick_nohz_handler+0xab/0xab [<ffffffff8105b16b>] hrtimer_interrupt+0xd0/0x1bc [<ffffffff810283c5>] local_apic_timer_interrupt+0x53/0x58 [<ffffffff81029035>] smp_apic_timer_interrupt+0x3e/0x51 [<ffffffff8148884a>] apic_timer_interrupt+0x6a/0x70 <EOI> [<ffffffff81082627>] ? __srcu_read_unlock+0xa/0x18 [<ffffffffa022b498>] vcpu_enter_guest+0x46f/0x696 [kvm] [<ffffffff8108260d>] ? __srcu_read_lock+0x39/0x49 [<ffffffffa022b726>] __vcpu_run+0x67/0x1bb [kvm] [<ffffffffa022f3e4>] kvm_arch_vcpu_ioctl_run+0xef/0x1ac [kvm] [<ffffffffa021d3e2>] kvm_vcpu_ioctl+0x121/0x4b5 [kvm] [<ffffffff8104a884>] ? do_sigtimedwait+0x8e/0x19f [<ffffffff81134125>] do_vfs_ioctl+0x2a2/0x2be [<ffffffff81091735>] ? SyS_futex+0x103/0x13d [<ffffffff8113419a>] SyS_ioctl+0x59/0x7d [<ffffffff81487ca2>] system_call_fastpath+0x16/0x1b Code: 00 c9 c3 55 48 89 e5 65 8b 34 25 70 b0 00 00 66 66 90 0f ae e8 0f 31 89 c1 66 66 90 0f ae e8 0f 31 89 c2 29 ca 39 fa 73 23 f3 90 <65> 44 8b 04 25 70 b0 00 00 44 39 c6 74 e0 29 c1 01 cf 66 66 90 NMI backtrace for cpu 1 CPU: 1 PID: 10727 Comm: qemu-system-x86 Not tainted 3.13.0 #2 Hardware name: Intel Corporation S2600CP/S2600CP, BIOS SE5C600.86B.99.99.x056.071020121508 07/10/2012 task: ffff8804310612b0 ti: ffff88043418c000 task.ti: ffff88043418c000 RIP: 0010:[<ffffffffa02a055a>] [<ffffffffa02a055a>] vmx_vcpu_run+0x3f3/0x4c3 [kvm_intel] RSP: 0018:ffff88043418dcb8 EFLAGS: 00000046 RAX: 0000000080000202 RBX: 0000000000000200 RCX: ffff8808377d00c0 RDX: 0000000000004404 RSI: 0000000000000002 RDI: ffff8808377d00c0 RBP: ffff88043418dd08 R08: ffffffff81c07720 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000004 R15: 0000000000000000 FS: 00007fb28d230700(0000) GS:ffff8800bd020000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000043d4e2000 CR4: 00000000000427e0 Stack: 0000000000000000 ffff8808377d00c0 ffff8808377d00c0 00000002377d00c0 ffff88043418dd08 ffff8808377d00c0 0000000000000000 ffff8808377d00f0 0000000000000000 0000000000000000 ffff88043418dd98 ffffffffa022b594 Call Trace: [<ffffffffa022b594>] vcpu_enter_guest+0x56b/0x696 [kvm] [<ffffffffa0243252>] ? __apic_accept_irq+0x130/0x1ea [kvm] [<ffffffffa0243362>] ? kvm_apic_local_deliver+0x56/0x5c [kvm] [<ffffffffa022b726>] __vcpu_run+0x67/0x1bb [kvm] [<ffffffffa022f3e4>] kvm_arch_vcpu_ioctl_run+0xef/0x1ac [kvm] [<ffffffffa021d3e2>] kvm_vcpu_ioctl+0x121/0x4b5 [kvm] [<ffffffff81134125>] do_vfs_ioctl+0x2a2/0x2be [<ffffffffa022937a>] ? kvm_on_user_return+0x4f/0x51 [kvm] [<ffffffff8113419a>] SyS_ioctl+0x59/0x7d [<ffffffff81487ca2>] system_call_fastpath+0x16/0x1b Code: 00 80 3d 12 03 00 80 75 05 e8 01 e2 ff ff 85 db 79 22 81 e3 00 07 00 00 81 fb 00 02 00 00 75 14 48 8b 7d b8 e8 d3 23 f8 ff cd 02 <48> 8b 7d b8 e8 d7 23 f8 ff f6 05 52 5d 01 00 20 48 8b 45 b8 8b -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
