Date: Fri, 22 Mar 2013 10:14:03 -0400 From: Paul Mather <paul@gromit.dlib.vt.edu> To: "stable@FreeBSD.org" <stable@freebsd.org> Subject: Virtio and GEOM labels Message-ID: <D5454720-6D16-4D42-8A13-7E6B29126180@gromit.dlib.vt.edu>
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I'm running FreeBSD 9-STABLE as a guest under RHEL 6.4 KVM = virtualisation. I have networking and storage in the FreeBSD guest = using the Virtio drivers (with the virtual disk set to "Virtio" in the = definition on the host). Everything is working nicely: I have a vtnet = network adapter and see vtbd devices for my virtual disks in FreeBSD. = Performance is much better compared with an emulated IDE device. The odd thing is that I don't see GEOM labels reflected in /dev. For = example, I have GPT labels defined in the guest, but I don't see them = show up under /dev/gpt. Similarly, my UFS labels don't show up under = /dev/ufs. I *do* see a /dev/gptid. That appears to be the only label = that shows up. Is there something special I need to do to get GPT and UFS labels to = appear when using Virtio? It seems to me that Virtio block devices = appear to be somewhat unusual. Unlike regular ATA and SCSI devices, my = vtbd devices don't appear in the boot dmesg (although a vtblk device = does), and "camcontrol devlist" does not list them. It's not clear to = me how I am supposed to interact with them other than via basic device = I/O through /dev/vtbdX. I thought that the virtio_scsi module might = make them appear as "da" devices and able to interacted with via = camcontrol, but this doesn't seem to be the case. I've included my system dmesg at the end of this message. Cheers, Paul. =3D=3D=3D=3D=3D Copyright (c) 1992-2013 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights = reserved. FreeBSD is a registered trademark of The FreeBSD Foundation. FreeBSD 9.1-STABLE #0 r248465: Mon Mar 18 11:19:23 EDT 2013 pmather@freebsd9.virtual.lib.vt.edu:/usr/obj/usr/src/sys/KVMTEST = amd64 FreeBSD clang version 3.2 (tags/RELEASE_32/final 170710) 20121221 CPU: QEMU Virtual CPU version (cpu64-rhel6) (2100.15-MHz K8-class CPU) Origin =3D "AuthenticAMD" Id =3D 0x6d3 Family =3D 0x6 Model =3D 0xd = Stepping =3D 3 = Features=3D0x783f3ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,MTRR,PGE,MCA,= CMOV,PAT,PSE36,MMX,FXSR,SSE,SSE2> Features2=3D0x80002001<SSE3,CX16,HV> AMD Features=3D0x22500800<SYSCALL,NX,MMX+,FFXSR,LM> AMD Features2=3D0x73<LAHF,CMP,CR8,ABM,SSE4A> real memory =3D 8589934592 (8192 MB) avail memory =3D 8255410176 (7872 MB) Event timer "LAPIC" quality 400 ACPI APIC Table: <BOCHS BXPCAPIC> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs FreeBSD/SMP: 2 package(s) x 1 core(s) cpu0 (BSP): APIC ID: 0 cpu1 (AP): APIC ID: 1 ioapic0 <Version 1.1> irqs 0-23 on motherboard kbd1 at kbdmux0 acpi0: <BOCHS BXPCRSDT> on motherboard acpi0: Power Button (fixed) cpu0: <ACPI CPU> on acpi0 cpu1: <ACPI CPU> on acpi0 atrtc0: <AT realtime clock> port 0x70-0x71,0x72-0x77 irq 8 on acpi0 Event timer "RTC" frequency 32768 Hz quality 0 Timecounter "ACPI-fast" frequency 3579545 Hz quality 900 acpi_timer0: <24-bit timer at 3.579545MHz> port 0xb008-0xb00b on acpi0 pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0 pci0: <ACPI PCI bus> on pcib0 pci_link4: Unable to route IRQs: AE_NOT_FOUND isab0: <PCI-ISA bridge> at device 1.0 on pci0 isa0: <ISA bus> on isab0 atapci0: <Intel PIIX3 WDMA2 controller> port = 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xc000-0xc00f at device 1.1 on pci0 ata0: <ATA channel> at channel 0 on atapci0 ata1: <ATA channel> at channel 1 on atapci0 uhci0: <Intel 82371SB (PIIX3) USB controller> port 0xc020-0xc03f irq 11 = at device 1.2 on pci0 usbus0: controller did not stop usbus0 on uhci0 pci0: <bridge> at device 1.3 (no driver attached) vgapci0: <VGA-compatible display> mem = 0xf0000000-0xf1ffffff,0xf2000000-0xf2000fff at device 2.0 on pci0 virtio_pci0: <VirtIO PCI Network adapter> port 0xc040-0xc05f mem = 0xf2020000-0xf2020fff irq 11 at device 3.0 on pci0 vtnet0: <VirtIO Networking Adapter> on virtio_pci0 virtio_pci0: host features: 0x711fffe3 = <EventIdx,RingIndirect,NotifyOnEmpty,RxModeExtra,VLanFilter,RxMode,Control= Vq,Status,MrgRxBuf,TxUFO,TxTSOECN,TxTSOv6,TxTSOv4,RxUFO,RxECN,RxTSOv6,RxTS= Ov4,TxAllGSO,MacAddress,RxChecksum,TxChecksum> virtio_pci0: negotiated features: 0x110fbba3 = <RingIndirect,NotifyOnEmpty,VLanFilter,RxMode,ControlVq,Status,MrgRxBuf,Tx= TSOECN,TxTSOv6,TxTSOv4,RxECN,RxTSOv6,RxTSOv4,MacAddress,RxChecksum,TxCheck= sum> vtnet0: Ethernet address: 52:54:00:3e:48:94 virtio_pci1: <VirtIO PCI Balloon adapter> port 0xc060-0xc07f irq 10 at = device 5.0 on pci0 vtballoon0: <VirtIO Balloon Adapter> on virtio_pci1 virtio_pci1: host features: 0x71000002 = <EventIdx,RingIndirect,NotifyOnEmpty,StatsVq> virtio_pci1: negotiated features: 0x0 virtio_pci2: <VirtIO PCI Block adapter> port 0xc080-0xc0bf mem = 0xf2040000-0xf2040fff irq 10 at device 6.0 on pci0 vtblk0: <VirtIO Block Adapter> on virtio_pci2 virtio_pci2: host features: 0x71000654 = <EventIdx,RingIndirect,NotifyOnEmpty,Topology,FlushCmd,BlockSize,DiskGeome= try,MaxNumSegs> virtio_pci2: negotiated features: 0x10000254 = <RingIndirect,FlushCmd,BlockSize,DiskGeometry,MaxNumSegs> vtblk0: 8192MB (16777216 512 byte sectors) atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0 atkbd0: <AT Keyboard> irq 1 on atkbdc0 kbd0 at atkbd0 atkbd0: [GIANT-LOCKED] psm0: <PS/2 Mouse> irq 12 on atkbdc0 psm0: [GIANT-LOCKED] psm0: model IntelliMouse Explorer, device ID 4 uart0: <Non-standard ns8250 class UART with FIFOs> port 0x3f8-0x3ff irq = 4 flags 0x10 on acpi0 orm0: <ISA Option ROM> at iomem 0xc9000-0xc97ff on isa0 sc0: <System console> at flags 0x100 on isa0 sc0: VGA <16 virtual consoles, flags=3D0x300> vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on = isa0 attimer0: <AT timer> at port 0x40 on isa0 Timecounter "i8254" frequency 1193182 Hz quality 0 Event timer "i8254" frequency 1193182 Hz quality 100 ctl: CAM Target Layer loaded Timecounters tick every 10.000 msec usbus0: 12Mbps Full Speed USB v1.0 ugen0.1: <Intel> at usbus0 uhub0: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus0 cd0 at ata1 bus 0 scbus1 target 0 lun 0 cd0: <QEMU QEMU DVD-ROM 0.12> Removable CD-ROM SCSI-0 device=20 cd0: 16.700MB/s transfers (WDMA2, ATAPI 12bytes, PIO 65534bytes) cd0: Attempt to query device size failed: NOT READY, Medium not present SMP: AP CPU #1 Launched! Root mount waiting for: usbus0 uhub0: 2 ports with 2 removable, self powered Trying to mount root from ufs:/dev/vtbd0p2 [rw]...
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