Re: Random guest crashes since 5c34d002dcc7 ("virtio_pci: use shared interrupts for virtqueues")

[Mike Galbraith <efault@gmx.de>]

On Mon, 2017-03-27 at 21:16 +0300, Michael S. Tsirkin wrote:

> Mike, could you pls send lspci -vv that shows up after
> boot?

Presuming you mean the virtual box..

00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
	Subsystem: Red Hat, Inc Qemu virtual machine
	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-

00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
	Subsystem: Red Hat, Inc Qemu virtual machine
	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-

00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II] (prog-if 80 [Master])
	Subsystem: Red Hat, Inc Qemu virtual machine
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Region 0: [virtual] Memory at 000001f0 (32-bit, non-prefetchable) [size=8]
	Region 1: [virtual] Memory at 000003f0 (type 3, non-prefetchable)
	Region 2: [virtual] Memory at 00000170 (32-bit, non-prefetchable) [size=8]
	Region 3: [virtual] Memory at 00000370 (type 3, non-prefetchable)
	Region 4: I/O ports at c240 [size=16]
	Kernel driver in use: ata_piix
	Kernel modules: ata_piix, pata_acpi, ata_generic

00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03)
	Subsystem: Red Hat, Inc Qemu virtual machine
	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Interrupt: pin A routed to IRQ 9
	Kernel driver in use: piix4_smbus
	Kernel modules: i2c_piix4

00:02.0 VGA compatible controller: Red Hat, Inc. QXL paravirtual graphic card (rev 04) (prog-if 00 [VGA controller])
	Subsystem: Red Hat, Inc QEMU Virtual Machine
	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Interrupt: pin A routed to IRQ 10
	Region 0: Memory at f4000000 (32-bit, non-prefetchable) [size=64M]
	Region 1: Memory at f8000000 (32-bit, non-prefetchable) [size=64M]
	Region 2: Memory at fc054000 (32-bit, non-prefetchable) [size=8K]
	Region 3: I/O ports at c140 [size=32]
	Expansion ROM at 000c0000 [disabled] [size=128K]
	Kernel driver in use: qxl
	Kernel modules: qxl

00:03.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8100/8101L/8139 PCI Fast Ethernet Adapter (rev 20)
	Subsystem: Red Hat, Inc QEMU Virtual Machine
	Physical Slot: 3
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 11
	Region 0: I/O ports at c000 [size=256]
	Region 1: Memory at fc056000 (32-bit, non-prefetchable) [size=256]
	Expansion ROM at fc000000 [disabled] [size=256K]
	Kernel driver in use: 8139cp
	Kernel modules: 8139cp, 8139too

00:04.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio Controller (rev 01)
	Subsystem: Red Hat, Inc QEMU Virtual Machine
	Physical Slot: 4
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 29
	Region 0: Memory at fc050000 (32-bit, non-prefetchable) [size=16K]
	Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
		Address: 00000000fee00000  Data: 4091
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel

00:05.0 SATA controller: Intel Corporation 82801IR/IO/IH (ICH9R/DO/DH) 6 port SATA Controller [AHCI mode] (rev 02) (prog-if 01 [AHCI 1.0])
	Subsystem: Red Hat, Inc QEMU Virtual Machine
	Physical Slot: 5
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 24
	Region 4: I/O ports at c160 [size=32]
	Region 5: Memory at fc057000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit+
		Address: 00000000fee00000  Data: 4041
	Capabilities: [a8] SATA HBA v1.0 BAR4 Offset=00000004
	Kernel driver in use: ahci
	Kernel modules: ahci

00:06.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03) (prog-if 00 [UHCI])
	Subsystem: Red Hat, Inc QEMU Virtual Machine
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 10
	Region 4: I/O ports at c180 [size=32]
	Kernel driver in use: uhci_hcd
	Kernel modules: uhci_hcd

00:06.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03) (prog-if 00 [UHCI])
	Subsystem: Red Hat, Inc QEMU Virtual Machine
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin B routed to IRQ 11
	Region 4: I/O ports at c1a0 [size=32]
	Kernel driver in use: uhci_hcd
	Kernel modules: uhci_hcd

00:06.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03) (prog-if 00 [UHCI])
	Subsystem: Red Hat, Inc QEMU Virtual Machine
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin C routed to IRQ 11
	Region 4: I/O ports at c1c0 [size=32]
	Kernel driver in use: uhci_hcd
	Kernel modules: uhci_hcd

00:06.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03) (prog-if 20 [EHCI])
	Subsystem: Red Hat, Inc QEMU Virtual Machine
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin D routed to IRQ 10
	Region 0: Memory at fc058000 (32-bit, non-prefetchable) [size=4K]
	Kernel driver in use: ehci-pci
	Kernel modules: ehci_pci

00:07.0 Communication controller: Red Hat, Inc Virtio console
	Subsystem: Red Hat, Inc Device 0003
	Physical Slot: 7
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 11
	Region 0: I/O ports at c1e0 [size=32]
	Region 1: Memory at fc059000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: [40] MSI-X: Enable+ Count=2 Masked-
		Vector table: BAR=1 offset=00000000
		PBA: BAR=1 offset=00000800
	Kernel driver in use: virtio-pci
	Kernel modules: virtio_pci

00:08.0 Unclassified device [00ff]: Red Hat, Inc Virtio memory balloon
	Subsystem: Red Hat, Inc Device 0005
	Physical Slot: 8
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 11
	Region 0: I/O ports at c200 [size=32]
	Kernel driver in use: virtio-pci
	Kernel modules: virtio_pci

00:09.0 Unclassified device [00ff]: Red Hat, Inc Virtio RNG
	Subsystem: Red Hat, Inc Device 0004
	Physical Slot: 9
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 10
	Region 0: I/O ports at c220 [size=32]
	Kernel driver in use: virtio-pci
	Kernel modules: virtio_pci

00:0a.0 SCSI storage controller: Red Hat, Inc Virtio block device
	Subsystem: Red Hat, Inc Device 0002
	Physical Slot: 10
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 10
	Region 0: I/O ports at c100 [size=64]
	Region 1: Memory at fc05a000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: [40] MSI-X: Enable+ Count=2 Masked-
		Vector table: BAR=1 offset=00000000
		PBA: BAR=1 offset=00000800
	Kernel driver in use: virtio-pci
	Kernel modules: virtio_pci