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Message-ID: <4D6BBB88.5060709@univ-nantes.fr> Date: Mon, 28 Feb 2011 16:13:12 +0100 From: Jean-Philippe Menil <jean-philippe.menil@...v-nantes.fr> To: "Michael S. Tsirkin" <mst@...hat.com> CC: kvm@...r.kernel.org, netdev@...r.kernel.org, virtualization@...ts.linux-foundation.org Subject: Re: Bug inkvm_set_irq Le 28/02/2011 12:39, Michael S. Tsirkin a écrit : > On Mon, Feb 28, 2011 at 11:40:43AM +0100, Jean-Philippe Menil wrote: >> Le 28/02/2011 11:11, Michael S. Tsirkin a écrit : >>> On Mon, Feb 28, 2011 at 09:56:46AM +0100, Jean-Philippe Menil wrote: >>>> Le 27/02/2011 18:00, Michael S. Tsirkin a écrit : >>>>> On Fri, Feb 25, 2011 at 10:07:22AM +0100, Jean-Philippe Menil wrote: >>>>>> Hi, >>>>>> >>>>>> Each time i try tou use vhost_net, i'm facing a kernel bug. >>>>>> I do a "modprobe vhost_net", and start guest whith vhost=on. >>>>>> >>>>>> Following is a trace with a kernel 2.6.37, but i had the same >>>>>> problem with 2.6.36 (cf https://lkml.org/lkml/2010/11/30/29). >>>>> 2.6.36 had a theorectical race that could explain this, >>>>> but it should be ok in 2.6.37. >>>>> >>>>>> The bug only occurs whith vhost_net charged, so i don't know if this >>>>>> is a bug in kvm module code or in the vhost_net code. >>>>> It could be a bug in eventfd which is the interface >>>>> used by both kvm and vhost_net. >>>>> Just for fun, you can try 3.6.38 - eventfd code has been changed >>>>> a lot in 2.6.38 and if it does not trigger there >>>>> it's a hint that irqfd is the reason. >>>>> >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.243100] BUG: unable to handle kernel paging request at >>>>>> 0000000000002458 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.243250] IP: [<ffffffffa041aa8a>] kvm_set_irq+0x2a/0x130 [kvm] >>>>> Could you run markup_oops/ ksymoops on this please? >>>>> As far as I can see kvm_set_irq can only get a wrong >>>>> kvm pointer. Unless there's some general memory corruption, >>>>> I'd guess >>>>> >>>>> You can also try comparing the irqfd->kvm pointer in >>>>> kvm_irqfd_assign irqfd_wakeup and kvm_set_irq in >>>>> virt/kvm/eventfd.c. >>>>> >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.243378] PGD 45d363067 PUD 45e77a067 PMD 0 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.243556] Oops: 0000 [#1] SMP >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.243692] last sysfs file: >>>>>> /sys/devices/pci0000:00/0000:00:0d.0/0000:05:00.0/0000:06:00.0/irq >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ 685.243777] CPU 0 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.243820] Modules linked in: vhost_net macvtap macvlan tun >>>>>> powernow_k8 mperf cpufreq_userspace cpufreq_stats cpufreq_powersave >>>>>> cpufreq_ondemand fre >>>>>> q_table cpufreq_conservative fuse xt_physdev ip6t_LOG >>>>>> ip6table_filter ip6_tables ipt_LOG xt_multiport xt_limit xt_tcpudp >>>>>> xt_state iptable_filter ip_tables x_tables nf_conntrack_tftp >>>>>> nf_conntrack_ftp nf_connt >>>>>> rack_ipv4 nf_defrag_ipv4 8021q bridge stp ext2 mbcache >>>>>> dm_round_robin dm_multipath nf_conntrack_ipv6 nf_conntrack >>>>>> nf_defrag_ipv6 kvm_amd kvm ipv6 snd_pcm snd_timer snd soundcore >>>>>> snd_page_alloc tpm_tis tpm ps >>>>>> mouse dcdbas tpm_bios processor i2c_nforce2 shpchp pcspkr ghes >>>>>> serio_raw joydev evdev pci_hotplug i2c_core hed button thermal_sys >>>>>> xfs exportfs dm_mod sg sr_mod cdrom usbhid hid usb_storage ses >>>>>> sd_mod enclosu >>>>>> re megaraid_sas ohci_hcd lpfc scsi_transport_fc scsi_tgt bnx2 >>>>>> scsi_mod ehci_hcd [last unloaded: scsi_wait_scan] >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ 685.246123] >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] Pid: 10, comm: kworker/0:1 Not tainted >>>>>> 2.6.37-dsiun-110105 #17 0K543T/PowerEdge M605 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] RIP: 0010:[<ffffffffa041aa8a>] [<ffffffffa041aa8a>] >>>>>> kvm_set_irq+0x2a/0x130 [kvm] >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] RSP: 0018:ffff88045fc89d30 EFLAGS: 00010246 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] RAX: 0000000000000000 RBX: 000000000000001a RCX: >>>>>> 0000000000000001 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] RDX: 0000000000000000 RSI: 0000000000000000 RDI: >>>>>> 0000000000000000 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] RBP: 0000000000000000 R08: 0000000000000001 R09: >>>>>> ffff880856a91e48 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] R10: 0000000000000000 R11: 00000000ffffffff R12: >>>>>> 0000000000000000 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] R13: 0000000000000001 R14: 0000000000000000 R15: >>>>>> 0000000000000000 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] FS: 00007f617986c710(0000) GS:ffff88007f800000(0000) >>>>>> knlGS:0000000000000000 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] CR2: 0000000000002458 CR3: 000000045d197000 CR4: >>>>>> 00000000000006f0 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] DR0: 0000000000000000 DR1: 0000000000000000 DR2: >>>>>> 0000000000000000 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: >>>>>> 0000000000000400 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] Process kworker/0:1 (pid: 10, threadinfo >>>>>> ffff88045fc88000, task ffff88085fc53c30) >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ 685.246123] Stack: >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] ffff88045fc89fd8 00000000000119c0 ffff88045fc88010 >>>>>> ffff88085fc53ee8 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] ffff88045fc89fd8 ffff88085fc53ee0 ffff88085fc53c30 >>>>>> 00000000000119c0 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] 00000000000119c0 ffffffff8137f7ce ffff88007f80df40 >>>>>> 00000000ffffffff >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] Call Trace: >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] [<ffffffff8137f7ce>] ? common_interrupt+0xe/0x13 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] [<ffffffffa041bc30>] ? irqfd_inject+0x0/0x50 [kvm] >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] [<ffffffffa041bc57>] ? irqfd_inject+0x27/0x50 [kvm] >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] [<ffffffffa041bc30>] ? irqfd_inject+0x0/0x50 [kvm] >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] [<ffffffff8106b6f2>] ? process_one_work+0x112/0x460 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] [<ffffffff8106be25>] ? worker_thread+0x145/0x410 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] [<ffffffff8103a3d0>] ? __wake_up_common+0x50/0x80 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] [<ffffffff8106bce0>] ? worker_thread+0x0/0x410 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] [<ffffffff8106bce0>] ? worker_thread+0x0/0x410 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] [<ffffffff8106f786>] ? kthread+0x96/0xa0 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] [<ffffffff81003ce4>] ? kernel_thread_helper+0x4/0x10 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] [<ffffffff8106f6f0>] ? kthread+0x0/0xa0 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] [<ffffffff81003ce0>] ? kernel_thread_helper+0x0/0x10 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] Code: ff 41 57 41 89 f7 41 56 41 55 41 89 cd 41 54 49 89 >>>>>> fc 55 53 89 d3 48 81 ec 98 00 00 00 8b 15 c6 79 03 00 85 d2 0f 85 c4 >>>>>> 00 00 00<4 >>>>>> 9> 8b 84 24 58 24 00 00 3b 98 28 01 00 00 73 5e 89 db 48 8b 84 >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] RIP [<ffffffffa041aa8a>] kvm_set_irq+0x2a/0x130 [kvm] >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] RSP<ffff88045fc89d30> >>>>>> Feb 23 13:56:19 ayrshire.u06.univ-nantes.prive kernel: [ >>>>>> 685.246123] CR2: 0000000000002458 >>>>>> >>>>>> >>>>>> If someone can help me, on how to solve this. >>>>>> >>>>>> Regards. >>>>>> _______________________________________________ >>>>>> Virtualization mailing list >>>>>> Virtualization@...ts.linux-foundation.org >>>>>> https://lists.linux-foundation.org/mailman/listinfo/virtualization >>>>> -- >>>>> To unsubscribe from this list: send the line "unsubscribe netdev" in >>>>> the body of a message to majordomo@...r.kernel.org >>>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>>> Hi, >>>> >>>> thanks for your response. >>>> >>>> This is what markup_oops.pl return me: >>>> "No matching code found" >>> Well, let's try to understand what's there. >>> >>> Do objdumop -ldS kvm.ko >>> look for<kvm_set_irq> >>> >>> and paste the content from start of that function >>> to offset 0x2a and a bit beyond. >>> >>> You can also upload your kvm.ko somewhere, I'll try to take a look. >>> >>> >>>> So this is not a vhost_net bug, or my oops is incomplete and >>>> markup_oops can't find the good vma offset. >>>> >>>> I will try to compare the pointers you indicate me, even it could be >>>> a little difficult for me. >>> Hmm you know how to add printk to code and rebuild, right? >>> >>>> Maybe i will try a 2.6.38, will wait a response from the kvm team. >>>> >>>> Regards. >>>> >>>> -- >>>> Jean-Philippe Menil - Pôle réseau Service IRTS >>>> DSI Université de Nantes >>>> jean-philippe.menil@...v-nantes.fr >>>> Tel : 02.53.48.49.27 - Fax : 02.53.48.49.09 >> So, here is the result for the objdump against the kvm.ko (the >> kvm_set_irq part) : > Can you try building with -g and adding -l and -S to objdump > please? I'd rather make the tool do the legwork than > do it manually. > >> 0000000000006a60<kvm_set_irq>: >> kvm_set_irq(): >> 6a60: 41 57 push %r15 >> 6a62: 41 89 f7 mov %esi,%r15d >> 6a65: 41 56 push %r14 >> 6a67: 41 55 push %r13 >> 6a69: 41 89 cd mov %ecx,%r13d >> 6a6c: 41 54 push %r12 >> 6a6e: 49 89 fc mov %rdi,%r12 >> 6a71: 55 push %rbp >> 6a72: 53 push %rbx >> 6a73: 89 d3 mov %edx,%ebx >> 6a75: 48 81 ec 98 00 00 00 sub $0x98,%rsp >> 6a7c: 8b 15 00 00 00 00 mov 0x0(%rip),%edx >> # 6a82<kvm_set_irq+0x22> >> 6a82: 85 d2 test %edx,%edx >> 6a84: 0f 85 c4 00 00 00 jne 6b4e<kvm_set_irq+0xee> >> 6a8a: 49 8b 84 24 58 24 00 mov 0x2458(%r12),%rax > OK, 0x6a8a is the offset. > After you build with -g, try > > addr2line kvm.ko 0x6a8a > > and see which line this points to. > > >> 6a91: 00 >> 6a92: 3b 98 28 01 00 00 cmp 0x128(%rax),%ebx >> 6a98: 73 5e jae 6af8<kvm_set_irq+0x98> >> 6a9a: 89 db mov %ebx,%ebx >> 6a9c: 48 8b 84 d8 30 01 00 mov 0x130(%rax,%rbx,8),%rax >> 6aa3: 00 >> 6aa4: 48 85 c0 test %rax,%rax >> 6aa7: 74 4f je 6af8<kvm_set_irq+0x98> >> 6aa9: 48 89 e2 mov %rsp,%rdx >> 6aac: 31 db xor %ebx,%ebx >> 6aae: 48 8b 08 mov (%rax),%rcx >> 6ab1: 83 c3 01 add $0x1,%ebx >> 6ab4: 0f 18 09 prefetcht0 (%rcx) >> 6ab7: 48 8b 48 e0 mov -0x20(%rax),%rcx >> 6abb: 48 89 0a mov %rcx,(%rdx) >> 6abe: 48 8b 48 e8 mov -0x18(%rax),%rcx >> 6ac2: 48 89 4a 08 mov %rcx,0x8(%rdx) >> 6ac6: 48 8b 48 f0 mov -0x10(%rax),%rcx >> 6aca: 48 89 4a 10 mov %rcx,0x10(%rdx) >> 6ace: 48 8b 48 f8 mov -0x8(%rax),%rcx >> 6ad2: 48 89 4a 18 mov %rcx,0x18(%rdx) >> 6ad6: 48 8b 08 mov (%rax),%rcx >> 6ad9: 48 89 4a 20 mov %rcx,0x20(%rdx) >> 6add: 48 8b 48 08 mov 0x8(%rax),%rcx >> 6ae1: 48 89 4a 28 mov %rcx,0x28(%rdx) >> 6ae5: 48 8b 00 mov (%rax),%rax >> 6ae8: 48 83 c2 30 add $0x30,%rdx >> 6aec: 48 85 c0 test %rax,%rax >> 6aef: 75 bd jne 6aae<kvm_set_irq+0x4e> >> 6af1: eb 07 jmp 6afa<kvm_set_irq+0x9a> >> 6af3: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) >> 6af8: 31 db xor %ebx,%ebx >> 6afa: bd ff ff ff ff mov $0xffffffff,%ebp >> 6aff: 49 89 e6 mov %rsp,%r14 >> 6b02: 85 db test %ebx,%ebx >> 6b04: 74 34 je 6b3a<kvm_set_irq+0xda> >> 6b06: 83 eb 01 sub $0x1,%ebx >> 6b09: 44 89 e9 mov %r13d,%ecx >> 6b0c: 44 89 fa mov %r15d,%edx >> 6b0f: 48 63 c3 movslq %ebx,%rax >> 6b12: 4c 89 e6 mov %r12,%rsi >> 6b15: 48 8d 04 40 lea (%rax,%rax,2),%rax >> 6b19: 48 c1 e0 04 shl $0x4,%rax >> 6b1d: 49 8d 3c 06 lea (%r14,%rax,1),%rdi >> 6b21: ff 54 04 08 callq *0x8(%rsp,%rax,1) >> 6b25: 85 c0 test %eax,%eax >> 6b27: 78 d9 js 6b02<kvm_set_irq+0xa2> >> 6b29: 85 ed test %ebp,%ebp >> 6b2b: ba 00 00 00 00 mov $0x0,%edx >> 6b30: 0f 48 ea cmovs %edx,%ebp >> 6b33: 85 db test %ebx,%ebx >> 6b35: 8d 2c 28 lea (%rax,%rbp,1),%ebp >> 6b38: 75 cc jne 6b06<kvm_set_irq+0xa6> >> 6b3a: 48 81 c4 98 00 00 00 add $0x98,%rsp >> 6b41: 89 e8 mov %ebp,%eax >> 6b43: 5b pop %rbx >> 6b44: 5d pop %rbp >> 6b45: 41 5c pop %r12 >> 6b47: 41 5d pop %r13 >> 6b49: 41 5e pop %r14 >> 6b4b: 41 5f pop %r15 >> 6b4d: c3 retq >> 6b4e: 48 8b 2d 00 00 00 00 mov 0x0(%rip),%rbp >> # 6b55<kvm_set_irq+0xf5> >> 6b55: 48 85 ed test %rbp,%rbp >> 6b58: 0f 84 2c ff ff ff je 6a8a<kvm_set_irq+0x2a> >> 6b5e: 48 8b 45 00 mov 0x0(%rbp),%rax >> 6b62: 48 8b 7d 08 mov 0x8(%rbp),%rdi >> 6b66: 48 83 c5 10 add $0x10,%rbp >> 6b6a: 44 89 f9 mov %r15d,%ecx >> 6b6d: 44 89 ea mov %r13d,%edx >> 6b70: 89 de mov %ebx,%esi >> 6b72: ff d0 callq *%rax >> 6b74: 48 8b 45 00 mov 0x0(%rbp),%rax >> 6b78: 48 85 c0 test %rax,%rax >> 6b7b: 75 e5 jne 6b62<kvm_set_irq+0x102> >> 6b7d: e9 08 ff ff ff jmpq 6a8a<kvm_set_irq+0x2a> >> 6b82: 66 66 66 66 66 2e 0f nopw %cs:0x0(%rax,%rax,1) >> 6b89: 1f 84 00 00 00 00 00 >> >> I admit that this analysis is too complicated for me. >> I, effectively, can rebuild a kernel with more printk, and program a reboot. >> >> The kvm.ko is available through the following address: >> http://filex.univ-nantes.fr/get?k=k1jKhQghdcHLz12Z50H >> >> Regards. > This has no debug data. Can you rebuild with -g please? > > BTW if you want to rerun and get more reliable backtrace, > tyr enabling frame pointers (do you know how to?). But this will change code > so backtrace will no longer be val we will need > a new one. > >> -- >> Jean-Philippe Menil - Pôle réseau Service IRTS >> DSI Université de Nantes >> jean-philippe.menil@...v-nantes.fr >> Tel : 02.53.48.49.27 - Fax : 02.53.48.49.09 > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html Host reboot with his new kernel (2.6.37.2), i modprobe vhost_net, start three kvm guests. Host hang in a half an hour. This time i get a general protection fault: [ 2380.381225] general protection fault: 0000 [#1] SMP [ 2380.381261] last sysfs file: /sys/devices/system/cpu/cpu11/cache/index2/shared_cpu_map [ 2380.381309] CPU 0 [ 2380.381316] Modules linked in: vhost_net macvtap macvlan tun veth powernow_k8 mperf cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_ondemand freq_table cpufreq_conservative fuse xt_physdev ip6t_LOG ip6table_filter ip6_tables ipt_LOG xt_multiport xt_limit xt_tcpudp xt_state iptable_filter ip_tables x_tables nf_conntrack_tftp nf_conntrack_ftp nf_conntrack_ipv4 nf_defrag_ipv4 8021q bridge stp ext2 mbcache dm_round_robin dm_multipath nf_conntrack_ipv6 nf_conntrack nf_defrag_ipv6 kvm_amd kvm ipv6 snd_pcm snd_timer snd soundcore snd_page_alloc shpchp i2c_nforce2 pci_hotplug psmouse tpm_tis joydev pcspkr tpm evdev i2c_core dcdbas tpm_bios serio_raw processor ghes button hed thermal_sys xfs exportfs dm_mod sg sr_mod cdrom usbhid hid usb_storage sd_mod ses enclosure megaraid_sas lpfc ohci_hcd scsi_transport_fc scsi_tgt scsi_mod bnx2 ehci_hcd [last unloaded: scsi_wait_scan] Feb 28 15:28:09 ayrshire.u06.univ-nantes.prive kernel: Feb 28 15:28:09 ayrshire.u06.univ-nantes.prive kernel: [ 2380.381839] Pid: 10, comm: kworker/0:1 Not tainted 2.6.37.2-dsiun-110105+ #2 Dell Inc. PowerEdge M605/0K543T [ 2380.381902] RIP: 0010:[<ffffffffa037e877>] [<ffffffffa037e877>] kvm_set_irq+0x37/0x140 [kvm] [ 2380.381973] RSP: 0018:ffff88045fc85d00 EFLAGS: 00010246 [ 2380.382002] RAX: 000200740000029c RBX: 000000000000001a RCX: 0000000000000001 [ 2380.382035] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88045dbb7440 [ 2380.382068] RBP: ffff88045fc85dd0 R08: ffff88045fc84000 R09: 000000000000000c [ 2380.382101] R10: 0000000000000036 R11: 00000000ffffffff R12: ffff88045dbb7440 [ 2380.382134] R13: ffff88045dbb7440 R14: ffffffffa037faa0 R15: 0000000000000001 [ 2380.382168] FS: 00007f0c97165720(0000) GS:ffff88007f800000(0000) knlGS:0000000000000000 [ 2380.382216] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 2380.382246] CR2: 00007f13bcc80b40 CR3: 000000045e96c000 CR4: 00000000000006f0 [ 2380.382279] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 2380.382312] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 2380.382347] Process kworker/0:1 (pid: 10, threadinfo ffff88045fc84000, task ffff88085fc53c30) [ 2380.382395] Stack: [ 2380.382416] 00000000000119c0 00000000000119c0 00000000000119c0 ffff88085fc53c30 [ 2380.382466] ffff88085fc53ee0 ffff88045fc85fd8 ffff88085fc53ee8 ffff88045fc84010 [ 2380.382516] 00000000000119c0 ffff88045fc85fd8 00000000000119c0 00000000000119c0 [ 2380.382566] Call Trace: [ 2380.382600] [<ffffffff813818ce>] ? common_interrupt+0xe/0x13 [ 2380.382648] [<ffffffffa037faa0>] ? irqfd_inject+0x0/0x50 [kvm] [ 2380.382694] [<ffffffffa037faca>] irqfd_inject+0x2a/0x50 [kvm] [ 2380.382729] [<ffffffff8106b7bb>] process_one_work+0x11b/0x450 [ 2380.382762] [<ffffffff8106bf37>] worker_thread+0x157/0x410 [ 2380.382796] [<ffffffff8103a569>] ? __wake_up_common+0x59/0x90 [ 2380.382828] [<ffffffff8106bde0>] ? worker_thread+0x0/0x410 [ 2380.382861] [<ffffffff8106f996>] kthread+0x96/0xa0 [ 2380.382894] [<ffffffff81003c64>] kernel_thread_helper+0x4/0x10 [ 2380.382927] [<ffffffff8106f900>] ? kthread+0x0/0xa0 [ 2380.382958] [<ffffffff81003c60>] ? kernel_thread_helper+0x0/0x10 [ 2380.382987] Code: 55 49 89 fd 41 54 53 89 d3 48 81 ec a8 00 00 00 8b 15 a6 75 03 00 89 b5 3c ff ff ff 85 d2 0f 85 d5 00 00 00 49 8b 85 58 24 00 00 <3b> 98 28 01 00 00 73 61 89 db 48 8b 84 d8 30 01 00 00 48 85 c0 [ 2380.383185] RIP [<ffffffffa037e877>] kvm_set_irq+0x37/0x140 [kvm] [ 2380.383231] RSP <ffff88045fc85d00> Running markup_oops.pl give me the following: vmaoffset = 18446744072102576128 ffffffffa037e841: 48 89 e5 mov %rsp,%rbp ffffffffa037e844: 41 57 push %r15 ffffffffa037e846: 41 89 cf mov %ecx,%r15d | %r15 => 1 %ecx = 1 ffffffffa037e849: 41 56 push %r14 | %r14 => ffffffffa037faa0 ffffffffa037e84b: 41 55 push %r13 ffffffffa037e84d: 49 89 fd mov %rdi,%r13 | %edi = ffff88045dbb7440 %r13 => ffff88045dbb7440 ffffffffa037e850: 41 54 push %r12 | %r12 => ffff88045dbb7440 ffffffffa037e852: 53 push %rbx ffffffffa037e853: 89 d3 mov %edx,%ebx | %ebx => 1a ffffffffa037e855: 48 81 ec a8 00 00 00 sub $0xa8,%rsp ffffffffa037e85c: 8b 15 00 00 00 00 mov 0x0(%rip),%edx # ffffffffa037e862 <kvm_set_irq+0x22> ffffffffa037e862: 89 b5 3c ff ff ff mov %esi,-0xc4(%rbp) | %esi = 0 ffffffffa037e868: 85 d2 test %edx,%edx | %edx => 0 ffffffffa037e86a: 0f 85 d5 00 00 00 jne ffffffffa037e945 <kvm_set_irq+0x105> ffffffffa037e870: 49 8b 85 58 24 00 00 mov 0x2458(%r13),%rax | %eax => 200740000029c %r13 = ffff88045dbb7440 *ffffffffa037e877: 3b 98 28 01 00 00 cmp 0x128(%rax),%ebx | %eax = 200740000029c %ebx = 1a <--- faulting instruction ffffffffa037e87d: 73 61 jae ffffffffa037e8e0 <kvm_set_irq+0xa0> ffffffffa037e87f: 89 db mov %ebx,%ebx ffffffffa037e881: 48 8b 84 d8 30 01 00 mov 0x130(%rax,%rbx,8),%rax ffffffffa037e888: 00 ffffffffa037e889: 48 85 c0 test %rax,%rax ffffffffa037e88c: 74 52 je ffffffffa037e8e0 <kvm_set_irq+0xa0> ffffffffa037e88e: 48 8d 95 40 ff ff ff lea -0xc0(%rbp),%rdx ffffffffa037e895: 31 db xor %ebx,%ebx ffffffffa037e897: 48 8b 08 mov (%rax),%rcx ffffffffa037e89a: 83 c3 01 add $0x1,%ebx ffffffffa037e89d: 0f 18 09 prefetcht0 (%rcx) ffffffffa037e8a0: 48 8b 48 e0 mov -0x20(%rax),%rcx ffffffffa037e8a4: 48 89 0a mov %rcx,(%rdx) ffffffffa037e8a7: 48 8b 48 e8 mov -0x18(%rax),%rcx ffffffffa037e8ab: 48 89 4a 08 mov %rcx,0x8(%rdx) ffffffffa037e8af: 48 8b 48 f0 mov -0x10(%rax),%rcx ffffffffa037e8b3: 48 89 4a 10 mov %rcx,0x10(%rdx) ffffffffa037e8b7: 48 8b 48 f8 mov -0x8(%rax),%rcx ffffffffa037e8bb: 48 89 4a 18 mov %rcx,0x18(%rdx) ffffffffa037e8bf: 48 8b 08 mov (%rax),%rcx I've re-run markup_oops on the first oops (2.6.37.1) (on the right module this time, sorry for that), it give me the following: vmaoffset = 18446744072103215104 ffffffffa041aa62: 41 89 f7 mov %esi,%r15d | %r15 => 0 %esi = 0 ffffffffa041aa65: 41 56 push %r14 | %r14 => 0 ffffffffa041aa67: 41 55 push %r13 ffffffffa041aa69: 41 89 cd mov %ecx,%r13d | %ecx = 1 %r13 => 1 ffffffffa041aa6c: 41 54 push %r12 ffffffffa041aa6e: 49 89 fc mov %rdi,%r12 | %edi = 0 %r12 => 0 ffffffffa041aa71: 55 push %rbp ffffffffa041aa72: 53 push %rbx ffffffffa041aa73: 89 d3 mov %edx,%ebx | %ebx => 1a ffffffffa041aa75: 48 81 ec 98 00 00 00 sub $0x98,%rsp ffffffffa041aa7c: 8b 15 00 00 00 00 mov 0x0(%rip),%edx # ffffffffa041aa82 <kvm_set_irq+0x22> ffffffffa041aa82: 85 d2 test %edx,%edx | %edx => 0 ffffffffa041aa84: 0f 85 c4 00 00 00 jne ffffffffa041ab4e <kvm_set_irq+0xee> *ffffffffa041aa8a: 49 8b 84 24 58 24 00 mov 0x2458(%r12),%rax | %eax = 0 %r12 = 0 <--- faulting instruction ffffffffa041aa91: 00 ffffffffa041aa92: 3b 98 28 01 00 00 cmp 0x128(%rax),%ebx ffffffffa041aa98: 73 5e jae ffffffffa041aaf8 <kvm_set_irq+0x98> ffffffffa041aa9a: 89 db mov %ebx,%ebx ffffffffa041aa9c: 48 8b 84 d8 30 01 00 mov 0x130(%rax,%rbx,8),%rax ffffffffa041aaa3: 00 ffffffffa041aaa4: 48 85 c0 test %rax,%rax ffffffffa041aaa7: 74 4f je ffffffffa041aaf8 <kvm_set_irq+0x98> ffffffffa041aaa9: 48 89 e2 mov %rsp,%rdx ffffffffa041aaac: 31 db xor %ebx,%ebx ffffffffa041aaae: 48 8b 08 mov (%rax),%rcx ffffffffa041aab1: 83 c3 01 add $0x1,%ebx ffffffffa041aab4: 0f 18 09 prefetcht0 (%rcx) ffffffffa041aab7: 48 8b 48 e0 mov -0x20(%rax),%rcx ffffffffa041aabb: 48 89 0a mov %rcx,(%rdx) ffffffffa041aabe: 48 8b 48 e8 mov -0x18(%rax),%rcx ffffffffa041aac2: 48 89 4a 08 mov %rcx,0x8(%rdx) ffffffffa041aac6: 48 8b 48 f0 mov -0x10(%rax),%rcx ffffffffa041aaca: 48 89 4a 10 mov %rcx,0x10(%rdx) ffffffffa041aace: 48 8b 48 f8 mov -0x8(%rax),%rcx It's appear that the kernel i recompiled (make-pkg) with the debug options for kvm module, doesn't have the debug! addr2line give me an "??:0" I will retent with the good options. Regards. -- Jean-Philippe Menil - Pôle réseau Service IRTS DSI Université de Nantes jean-philippe.menil@...v-nantes.fr Tel : 02.53.48.49.27 - Fax : 02.53.48.49.09 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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