[kvm-devel] [ kvm-Bugs-1804597 ] soft lockup while running SMP linux guest

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Bugs item #1804597, was opened at 2007-09-29 10:56
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: yunfeng (yunfeng)
Assigned to: Nobody/Anonymous (nobody)
Summary: soft lockup while running SMP linux guest

Initial Comment:
I catched a error while runing a 32bit smp linux on pae host.
The linux guest hanged while running fsck on hda1.
The linux kernel is 2.6.16, vcpu# is 4.
Here is the command:
qemu . -m 512 -smp 4 -no-acpi -net nic,macaddr=00:16:3e:4c:c7:1c,model=rtl8139 -net tap,script=/etc/kvm/qemu-ifup -hda /share/xvs/var/tmp-img_gtp10_1191033976_1

Output from dmesg of host:
BUG: soft lockup detected on CPU#3!
 [<c044a0b7>] softlockup_tick+0x98/0xa6
 [<c042cc98>] update_process_times+0x39/0x5c
 [<c04176ec>] smp_apic_timer_interrupt+0x5c/0x64
 [<c04049bf>] apic_timer_interrupt+0x1f/0x24
 [<f8abe2dd>] kvm_flush_remote_tlbs+0xce/0xdb [kvm]
 [<f8ac3079>] kvm_mmu_pte_write+0x1e0/0x356 [kvm]
 [<f8abe825>] emulator_write_emulated_onepage+0xba/0x164 [kvm]
 [<f8ac5e66>] x86_emulate_insn+0x20ac/0x312e [kvm]
 [<f8ac3b9a>] x86_decode_insn+0x624/0x844 [kvm]
 [<f8abe63e>] emulate_instruction+0x12b/0x258 [kvm]
 [<f8a17314>] handle_exception+0x16a/0x246 [kvm_intel]
 [<f8a170db>] kvm_handle_exit+0x70/0x8a [kvm_intel]
 [<f8abec7c>] kvm_vcpu_ioctl_run+0x230/0x335 [kvm]
 [<f8abee91>] kvm_vcpu_ioctl+0x0/0xc67 [kvm]
 [<f8abef94>] kvm_vcpu_ioctl+0x103/0xc67 [kvm]
 [<c04049bf>] apic_timer_interrupt+0x1f/0x24
 [<c047abd9>] do_select+0x3ae/0x3cb
 [<c047b11f>] __pollwait+0x0/0xb2
 [<c0547843>] loopback_xmit+0x75/0x7a
 [<c0427fd6>] local_bh_enable+0x74/0x7f
 [<c05a5595>] dev_queue_xmit+0x22e/0x24d
 [<c05c2673>] ip_output+0x1c0/0x1f9
 [<c05c9b9e>] tcp_cong_avoid+0x15/0x25
 [<c05cbbc8>] tcp_ack+0x1597/0x16c9
 [<c05ceb20>] tcp_rcv_established+0x733/0x7c3
 [<c05d3a67>] tcp_v4_do_rcv+0x25/0x2bc
 [<c059ca38>] release_sock+0x59/0x91
 [<c04db744>] __next_cpu+0x12/0x21
 [<c041c97f>] find_busiest_group+0x177/0x462
 [<c041d3cd>] enqueue_task+0x29/0x39
 [<c041d3f9>] __activate_task+0x1c/0x29
 [<c041dc43>] try_to_wake_up+0x371/0x37b
 [<c047ade5>] core_sys_select+0x1ef/0x2ca
 [<c041c41c>] __wake_up_common+0x2f/0x53
 [<c041d20d>] __wake_up+0x2a/0x3d
 [<c0437cef>] wake_futex+0x3a/0x44
 [<c042d849>] __dequeue_signal+0x151/0x15c
 [<c042e942>] dequeue_signal+0x2d/0x9c
 [<c042f4d2>] sys_rt_sigtimedwait+0xc5/0x2c2
 [<f8abee91>] kvm_vcpu_ioctl+0x0/0xc67 [kvm]
 [<c0479cc8>] do_ioctl+0x1c/0x5d
 [<c0479f53>] vfs_ioctl+0x24a/0x25c
 [<c0479fad>] sys_ioctl+0x48/0x5f
 [<c0403eff>] syscall_call+0x7/0xb


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