Bug 989914

my host cpu info:

processor	: 7
vendor_id	: GenuineIntel
cpu family	: 6
model		: 42
model name	: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz
stepping	: 7
cpu MHz		: 1600.000
cache size	: 8192 KB
physical id	: 0
siblings	: 8
core id		: 3
cpu cores	: 4
apicid		: 7
initial apicid	: 7
fpu		: yes
fpu_exception	: yes
cpuid level	: 13
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid
bogomips	: 6784.34
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

(In reply to Sibiao Luo from comment #0)
> Version-Release number of selected component (if applicable):
> host info:
> 2.6.32-401.el6.x86_64
> qemu-kvm-0.12.1.2-2.382.el6.x86_64
> seabios-0.6.1.2-28.el6.x86_64
> guest info:
> 2.6.32-401.el6.x86_64
Note: I wrote the guest info by mistake, it's only hit by rhel7 guest, it cann't hit by rhel6.5 guest.
> Additional info:
> # /usr/libexec/qemu-kvm -S -M rhel6.5.0 -cpu SandyBridge -enable-kvm -m 4096
> -smp 4 -no-kvm-pit-reinjection -name sluo -uuid
> 43425b70-86e5-4664-bf2c-3b76699a8aec -rtc
> base=localtime,clock=host,driftfix=slew -device
> virtio-serial-pci,id=virtio-serial0,max_ports=16,vectors=0,bus=pci.0,
> addr=0x3 -chardev socket,id=channel1,path=/tmp/helloworld1,server,nowait
> -device
> virtserialport,chardev=channel1,name=com.redhat.rhevm.vdsm.1,bus=virtio-
> serial0.0,id=port1,nr=1 -chardev
> socket,id=channel2,path=/tmp/helloworld2,server,nowait -device
> virtserialport,chardev=channel2,name=com.redhat.rhevm.vdsm.2,bus=virtio-
> serial0.0,id=port2,nr=2 -drive
> file=/home/RHEL-Server-7.0-64.qcow2,if=none,id=drive-system-disk,
> format=qcow2,cache=none,aio=native,werror=stop,rerror=stop,serial="QEMU-
> DISK1" -device virtio-scsi-pci,bus=pci.0,addr=0x4,id=scsi0 -device
> scsi-hd,drive=drive-system-disk,id=system-disk,bootindex=1 -device
> virtio-balloon-pci,id=ballooning,bus=pci.0,addr=0x5 -global
> PIIX4_PM.disable_s3=0 -global PIIX4_PM.disable_s4=0 -netdev
> tap,id=hostnet0,vhost=off,script=/etc/qemu-ifup -device
> virtio-net-pci,netdev=hostnet0,id=virtio-net-pci0,mac=2C:41:38:B6:32:21,
> bus=pci.0,addr=0x6,bootindex=2 -drive
> file=/dev/cdrom,if=none,id=drive-cd-disk,media=cdrom,format=raw,cache=none,
> werror=stop,rerror=stop -device virtio-scsi-pci,bus=pci.0,addr=0x7,id=scsi1
> -device scsi-block,drive=drive-cd-disk,bus=scsi1.0,id=scsi_cd -k en-us -boot
> menu=on -vnc :1 -spice port=5931,disable-ticketing -qmp
> tcp:0:4444,server,nowait -monitor stdio

According comment #5, it's no longer regression issue, so i adjust the Priority/Severity to low/low.

Best Regards,
sluo

Low priority, low impact, not a customer issue ==> Deferring to rhel-6.6 (at least) because of capacity.

Hit this problem on qemu-kvm-rhev-0.12.1.2-2.430.el6.x86_64.

Host:
qemu-guest-agent-0.12.1.2-2.430.el6.x86_64
qemu-kvm-rhev-debuginfo-0.12.1.2-2.430.el6.x86_64
qemu-img-rhev-0.12.1.2-2.430.el6.x86_64
qemu-kvm-rhev-tools-0.12.1.2-2.430.el6.x86_64
qemu-kvm-rhev-0.12.1.2-2.430.el6.x86_64
kernel-2.6.32-491.el6.x86_64

Guest:
RHEL7-64
kernel-3.10.0-123.el7.x86_64

Cli:
/usr/libexec/qemu-kvm \
-M rhel6.6.0 \
-cpu SandyBridge \
-m 4G \
-smp 4,sockets=1,cores=2,threads=2,maxcpus=160 \
-enable-kvm \
-name rhel6.6 \
-uuid 990ea161-6b67-47b2-b803-19fb01d30d12 \
-smbios type=1,manufacturer='Red Hat',product='RHEV Hypervisor',version=el6,serial=koTUXQrb,uuid=feebc8fd-f8b0-4e75-abc3-e63fcdb67170 \
-k en-us \
-rtc base=localtime,clock=host,driftfix=slew \
-nodefaults \
-monitor stdio \
-qmp tcp:0:6666,server,nowait \
-boot menu=on \
-bios /usr/share/seabios/bios.bin \
-chardev socket,id=seabios,path=/tmp/seabios0,server,nowait \
-device isa-debugcon,chardev=seabios,iobase=0x402 \
-monitor unix:/tmp/socket0,server,nowait -device sga \
-vga qxl \
-spice port=5900,disable-ticketing \
-netdev tap,id=hostnet0,vhost=on \
-device virtio-net-pci,netdev=hostnet0,id=net0 \
-usb \
-device usb-tablet,id=tablet0 \
-drive file=/home/rhel7-64.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,cache=none,werror=stop,rerror=stop,aio=threads \
-device virtio-blk-pci,scsi=off,bus=pci.0,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 \
-device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x8 \
-drive file=/dev/sr0,if=none,id=drive-hostdev0,readonly=on \
-device scsi-generic,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-hostdev0,id=hostdev0 \

Result:
Host crash.
<4>------------[ cut here ]------------
<2>kernel BUG at drivers/ata/libata-core.c:5115!
<4>invalid opcode: 0000 [#1] SMP
<4>last sysfs file: /sys/devices/system/cpu/online
<4>CPU 3
<4>Modules linked in: cpufreq_ondemand acpi_cpufreq freq_table mperf bridge stp llc ipv6 dm_mirror vhost_net macvtap macvlan tun kvm_intel kvm iTCO_wdt iTCO_vendor_support tpm_infineon microcode serio_raw i2c_i801 sg lpc_ich mfd_core e1000e ptp pps_core snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm snd_timer snd soundcore snd_page_alloc ext4 jbd2 mbcache sr_mod cdrom sd_mod crc_t10dif ahci xhci_hcd video output wmi radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan]
<4>
<4>Pid: 2465, comm: qemu-kvm Not tainted 2.6.32-491.el6.x86_64 #1 Hewlett-Packard HP Compaq Elite 8300 MT/3397
<4>RIP: 0010:[<ffffffff81394abe>]  [<ffffffff81394abe>] ata_qc_issue+0x29e/0x340
<4>RSP: 0018:ffff88020fafdaa8  EFLAGS: 00010046
<4>RAX: 0000000000000001 RBX: ffff880213071640 RCX: 0000000000000018
<4>RDX: ffff880213071d58 RSI: 0000000000000045 RDI: ffff880213071640
<4>RBP: ffff88020fafdaf8 R08: ffff880213070000 R09: ffff880213071500
<4>R10: ffff880213071690 R11: 0000000000000000 R12: ffff880213070000
<4>R13: ffff880213071d58 R14: 0000000000000001 R15: 0000000000000001
<4>FS:  00007fb5b93fb700(0000) GS:ffff8800282c0000(0000) knlGS:0000000000000000
<4>CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
<4>CR2: 00007f19dd06a228 CR3: 00000002166be000 CR4: 00000000001427e0
<4>DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<4>DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
<4>Process qemu-kvm (pid: 2465, threadinfo ffff88020fafc000, task ffff8802139f6040)
<4>Stack:
<4> ffff88020faf2488 0000000000000082 ffff88020fafdaf8 ffffffff8137f329
<4><d> ffff8802139f6040 ffff880213071640 0000000000000000 ffff880213071ec0
<4><d> ffffffff8139cc00 ffff880213070000 ffff88020fafdb48 ffffffff81399f97
<4>Call Trace:
<4> [<ffffffff8137f329>] ? scsi_get_command+0x89/0xc0
<4> [<ffffffff8139cc00>] ? ata_scsi_pass_thru+0x0/0x300
<4> [<ffffffff81399f97>] ata_scsi_translate+0xa7/0x180
<4> [<ffffffff8137e5f0>] ? scsi_done+0x0/0x60
<4> [<ffffffff8137e5f0>] ? scsi_done+0x0/0x60
<4> [<ffffffff8139d68d>] ata_scsi_queuecmd+0xbd/0x2d0
<4> [<ffffffff8137e845>] scsi_dispatch_cmd+0xe5/0x310
<4> [<ffffffff813870ee>] scsi_request_fn+0x5be/0x750
<4> [<ffffffff8108747d>] ? del_timer+0x7d/0xe0
<4> [<ffffffff8126a080>] ? elv_insert+0x110/0x190
<4> [<ffffffff8126ed32>] __generic_unplug_device+0x32/0x40
<4> [<ffffffff81276b7f>] blk_execute_rq_nowait+0x7f/0x110
<4> [<ffffffff81271480>] ? blk_get_request+0x70/0xa0
<4> [<ffffffffa0333af1>] sg_common_write+0x331/0x570 [sg]
<4> [<ffffffff812398e6>] ? selinux_capable+0x46/0x60
<4> [<ffffffff8108291a>] ? capable+0x2a/0x60
<4> [<ffffffffa0335183>] sg_new_write+0x293/0x390 [sg]
<4> [<ffffffffa033620b>] sg_ioctl+0xb2b/0xd00 [sg]
<4> [<ffffffff8108e4d0>] ? do_send_sig_info+0x70/0x90
<4> [<ffffffff811a354c>] vfs_ioctl+0x7c/0xa0
<4> [<ffffffff811a3694>] do_vfs_ioctl+0x84/0x580
<4> [<ffffffff811a3c11>] sys_ioctl+0x81/0xa0
<4> [<ffffffff810e5ade>] ? __audit_syscall_exit+0x25e/0x290
<4> [<ffffffff8100b072>] system_call_fastpath+0x16/0x1b
<4>Code: ff ff 0f 1f 00 4c 8b 3d a9 93 a6 00 e9 75 fe ff ff 48 83 bb a0 00 00 00 00 74 10 83 7b 54 00 74 0a 83 7b 64 00 0f 85 19 fe ff ff <0f> 0b eb fe 41 83 4d 38 06 49 8d 7d 28 48 c7 c6 b9 63 7f 81 31
<1>RIP  [<ffffffff81394abe>] ata_qc_issue+0x29e/0x340
<4> RSP <ffff88020fafdaa8>

(In reply to Ademar Reis from comment #7)
> Low priority, low impact, not a customer issue ==> Deferring to rhel-6.6 (at
> least) because of capacity.

This has been deferred multiple times already and we've never seen a complaint from users, so I'm closing it as NEXTRELEASE (doesn't happen with RHEL7 hosts).