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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] libxl: problem with devices in PV
On Wed, 20 Jul 2011, Roger Pau Monnà wrote: > Hello, > > I'm trying to run PV machines using the new libxenlight toolstack on > NetBSD. So far, I've been able to connect to the domu using the > console (I was unable to do so before). I'm attaching a little patch > that removes setting the consback to IOEMU when detecting a qdisk > (that was preventing the domu from even booting). With the > introduction of libxenlight, Xen doesn't use vbd for disk backend > anymore, it uses qdisk, which I assume Qemu automatically attaches to > running guests. It works fine with HVM guests, but it seems to fail > with PV guests. The config file I'm using is: > Xen uses qdisk only when blktap is not available. I suggest you install blktap if you can because it is significantly faster than qdisk at the moment. Otherwise if you use a physical partition and specify phy: in the config file you should get the kernel based blkback that is the fastest option available. > bootloader = '/usr/xen42/bin/pygrub' > vcpus = '1' > memory = '30720' > > root = '/dev/xvda2 ro' > disk = [ > 'file:/home/xen/debian/disk.img,xvda2,w', > 'file:/home/xen/debian/swap.img,xvda1,w', > ] > > name = 'debian' > > on_poweroff = 'destroy' > on_reboot = 'restart' > on_crash = 'restart' > > And the output from booting: > > [ 0.000000] Initializing cgroup subsys cpuset > [ 0.000000] Initializing cgroup subsys cpu > [ 0.000000] Linux version 2.6.32-5-xen-amd64 (Debian > 2.6.32-34squeeze1) (dannf@xxxxxxxxxx) (gcc version 4.3.5 (Debian > 4.3.5-4) ) #1 SMP Thu May 19 01:16:47 UTC 2011 > [ 0.000000] Command line: root=/dev/xvda2 ro root=/dev/xvda2 ro > [ 0.000000] KERNEL supported cpus: > [ 0.000000] Intel GenuineIntel > [ 0.000000] AMD AuthenticAMD > [ 0.000000] Centaur CentaurHauls > [ 0.000000] ACPI in unprivileged domain disabled > [ 0.000000] released 0 pages of unused memory > [ 0.000000] BIOS-provided physical RAM map: > [ 0.000000] Xen: 0000000000000000 - 00000000000a0000 (usable) > [ 0.000000] Xen: 00000000000a0000 - 0000000000100000 (reserved) > [ 0.000000] Xen: 0000000000100000 - 0000000780000000 (usable) > [ 0.000000] DMI not present or invalid. > [ 0.000000] last_pfn = 0x780000 max_arch_pfn = 0x400000000 > [ 0.000000] last_pfn = 0x100000 max_arch_pfn = 0x400000000 > [ 0.000000] init_memory_mapping: 0000000000000000-0000000100000000 > [ 0.000000] init_memory_mapping: 0000000100000000-0000000780000000 > [ 0.000000] RAMDISK: 016ba000 - 02feb000 > [ 0.000000] No NUMA configuration found > [ 0.000000] Faking a node at 0000000000000000-0000000780000000 > [ 0.000000] Bootmem setup node 0 0000000000000000-0000000780000000 > [ 0.000000] NODE_DATA [0000000000008000 - 000000000000ffff] > [ 0.000000] bootmap [00000000008c7000 - 00000000009b6fff] pages f0 > [ 0.000000] (8 early reservations) ==> bootmem [0000000000 - 0780000000] > [ 0.000000] #0 [0000000000 - 0000001000] BIOS data page ==> > [0000000000 - 0000001000] > [ 0.000000] #1 [0006bee000 - 0006c29000] XEN PAGETABLES ==> > [0006bee000 - 0006c29000] > [ 0.000000] #2 [0000006000 - 0000008000] TRAMPOLINE ==> > [0000006000 - 0000008000] > [ 0.000000] #3 [0001000000 - 00016999d4] TEXT DATA BSS ==> > [0001000000 - 00016999d4] > [ 0.000000] #4 [00016ba000 - 0002feb000] RAMDISK ==> > [00016ba000 - 0002feb000] > [ 0.000000] #5 [0002feb000 - 0006bee000] XEN START INFO ==> > [0002feb000 - 0006bee000] > [ 0.000000] #6 [0000100000 - 00008c7000] PGTABLE ==> > [0000100000 - 00008c7000] > [ 0.000000] #7 [0006c29000 - 000a043000] PGTABLE ==> > [0006c29000 - 000a043000] > [ 0.000000] Zone PFN ranges: > [ 0.000000] DMA 0x00000000 -> 0x00001000 > [ 0.000000] DMA32 0x00001000 -> 0x00100000 > [ 0.000000] Normal 0x00100000 -> 0x00780000 > [ 0.000000] Movable zone start PFN for each node > [ 0.000000] early_node_map[2] active PFN ranges > [ 0.000000] 0: 0x00000000 -> 0x000000a0 > [ 0.000000] 0: 0x00000100 -> 0x00780000 > [ 0.000000] SFI: Simple Firmware Interface v0.7 http://simplefirmware.org > [ 0.000000] SMP: Allowing 1 CPUs, 0 hotplug CPUs > [ 0.000000] No local APIC present > [ 0.000000] APIC: disable apic facility > [ 0.000000] PM: Registered nosave memory: 00000000000a0000 - > 0000000000100000 > [ 0.000000] PCI: Warning: Cannot find a gap in the 32bit address range > [ 0.000000] PCI: Unassigned devices with 32bit resource registers may > break! > [ 0.000000] Allocating PCI resources starting at 780100000 (gap: > 780100000:400000) > [ 0.000000] Booting paravirtualized kernel on Xen > [ 0.000000] Xen version: 4.2-unstable (preserve-AD) > [ 0.000000] NR_CPUS:512 nr_cpumask_bits:512 nr_cpu_ids:1 nr_node_ids:1 > [ 0.000000] PERCPU: Embedded 30 pages/cpu @ffff88002804f000 s90328 > r8192 d24360 u122880 > [ 0.000000] pcpu-alloc: s90328 r8192 d24360 u122880 alloc=30*4096 > [ 0.000000] pcpu-alloc: [0] 0 > [ 0.000000] Xen: using vcpu_info placement > [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. > Total pages: 7754710 > [ 0.000000] Policy zone: Normal > [ 0.000000] Kernel command line: root=/dev/xvda2 ro root=/dev/xvda2 ro > [ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes) > [ 0.000000] Initializing CPU#0 > [ 0.000000] Checking aperture... > [ 0.000000] No AGP bridge found > [ 0.000000] Memory: 30803904k/31457280k available (3149k kernel > code, 384k absent, 652992k reserved, 1907k data, 604k init) > [ 0.000000] SLUB: Genslabs=14, HWalign=64, Order=0-3, MinObjects=0, > CPUs=1, Nodes=1 > [ 0.000000] Hierarchical RCU implementation. > [ 0.000000] NR_IRQS:4352 nr_irqs:512 > [ 0.000000] Console: colour dummy device 80x25 > [ 0.000000] console [tty0] enabled > [ 0.000000] console [hvc0] enabled > [ 0.000000] installing Xen timer for CPU 0 > [ 0.000000] Detected 2394.046 MHz processor. > [ 0.004000] Calibrating delay loop (skipped), value calculated > using timer frequency.. 4788.09 BogoMIPS (lpj=9576184) > [ 0.004000] Security Framework initialized > [ 0.004000] SELinux: Disabled at boot. > [ 0.005680] Dentry cache hash table entries: 4194304 (order: 13, > 33554432 bytes) > [ 0.014625] Inode-cache hash table entries: 2097152 (order: 12, > 16777216 bytes) > [ 0.017597] Mount-cache hash table entries: 256 > [ 0.017761] Initializing cgroup subsys ns > [ 0.017769] Initializing cgroup subsys cpuacct > [ 0.017776] Initializing cgroup subsys devices > [ 0.017782] Initializing cgroup subsys freezer > [ 0.017786] Initializing cgroup subsys net_cls > [ 0.017827] CPU: L1 I cache: 32K, L1 D cache: 32K > [ 0.017835] CPU: L2 cache: 256K > [ 0.017838] CPU: L3 cache: 12288K > [ 0.017844] CPU 0/0x20 -> Node 0 > [ 0.017848] CPU: Unsupported number of siblings 32 > [ 0.017854] Performance Events: unsupported p6 CPU model 44 no PMU > driver, software events only. > [ 0.017874] SMP alternatives: switching to UP code > [ 0.020000] Freeing SMP alternatives: 28k freed > [ 0.020192] Brought up 1 CPUs > [ 0.020309] devtmpfs: initialized > [ 0.024342] Grant table initialized > [ 0.024351] regulator: core version 0.5 > [ 0.024403] NET: Registered protocol family 16 > [ 0.025064] PCI: setting up Xen PCI frontend stub > [ 0.026729] bio: create slab <bio-0> at 0 > [ 0.026798] ACPI: Interpreter disabled. > [ 0.026833] xen_balloon: Initialising balloon driver with page order 0. > [ 0.026878] vgaarb: loaded > [ 0.026939] PCI: System does not support PCI > [ 0.026944] PCI: System does not support PCI > [ 0.027019] Switching to clocksource xen > [ 0.028001] pnp: PnP ACPI: disabled > [ 0.028001] NET: Registered protocol family 2 > [ 0.028001] IP route cache hash table entries: 524288 (order: 10, > 4194304 bytes) > [ 0.028460] TCP established hash table entries: 524288 (order: 11, > 8388608 bytes) > [ 0.030137] TCP bind hash table entries: 65536 (order: 8, 1048576 bytes) > [ 0.030331] TCP: Hash tables configured (established 524288 bind 65536) > [ 0.030337] TCP reno registered > [ 0.030405] NET: Registered protocol family 1 > [ 0.030463] Unpacking initramfs... > [ 0.051340] Freeing initrd memory: 25796k freed > [ 0.058949] PCI-DMA: Using software bounce buffering for IO (SWIOTLB) > [ 0.058964] DMA: Placing 64MB software IO TLB between > ffff880020000000 - ffff880024000000 > [ 0.058970] DMA: software IO TLB at phys 0x20000000 - 0x24000000 > [ 0.059058] platform rtc_cmos: registered platform RTC device (no > PNP device found) > [ 0.059272] audit: initializing netlink socket (disabled) > [ 0.059288] type=2000 audit(1311165823.857:1): initialized > [ 0.064506] HugeTLB registered 2 MB page size, pre-allocated 0 pages > [ 0.065744] VFS: Disk quotas dquot_6.5.2 > [ 0.065796] Dquot-cache hash table entries: 512 (order 0, 4096 bytes) > [ 0.065877] msgmni has been set to 32768 > [ 0.066057] alg: No test for stdrng (krng) > [ 0.066112] Block layer SCSI generic (bsg) driver version 0.4 > loaded (major 253) > [ 0.066119] io scheduler noop registered > [ 0.066122] io scheduler anticipatory registered > [ 0.066127] io scheduler deadline registered > [ 0.066157] io scheduler cfq registered (default) > [ 0.072642] registering netback > [ 0.074001] Linux agpgart interface v0.103 > [ 0.074032] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled > [ 0.173825] input: Macintosh mouse button emulation as > /devices/virtual/input/input0 > [ 0.173872] PNP: No PS/2 controller found. Probing ports directly. > [ 0.174689] i8042.c: No controller found. > [ 0.174750] mice: PS/2 mouse device common for all mice > [ 0.174829] rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0 > [ 0.174883] cpuidle: using governor ladder > [ 0.174890] cpuidle: using governor menu > [ 0.174897] No iBFT detected. > [ 0.175118] TCP cubic registered > [ 0.175221] NET: Registered protocol family 10 > [ 0.175788] Mobile IPv6 > [ 0.175797] NET: Registered protocol family 17 > [ 0.175889] registered taskstats version 1 > [ 5.272069] XENBUS: Waiting for devices to initialise: > 295s...290s...285s...280s...275s...270s...265s...260s...255s...250s...245s...240s...235s...230s...225s...220s...215s...210s...205s...200s...195s...190s...185s...180s...175s...170s...165s...160s...155s...150s...145s...140s...135s...130s...125s.... > udevd[46]: worker [53] unexpectedly returned with status 0x0100 > udevd[46]: worker [53] failed while handling '/devices/vbd-51713' > udevd[46]: worker [54] unexpectedly returned with status 0x0100 > udevd[46]: worker [54] failed while handling '/devices/vbd-51714' > Begin: Loading essential drivers ... done. > Begin: Running /scripts/init-premount ... done. > Begin: Mounting root file system ... Begin: Running /scripts/local-top ... > done. > Begin: Waiting for root file system ... > 120s...115s...110s...105s...100s...95s...90s...done. > Gave up waiting for root device. Common problems: > - Boot args (cat /proc/cmdline) > - Check rootdelay= (did the system wait long enough?) > - Check root= (did the system wait for the right device?) > - Missing modules (cat /proc/modules; ls /dev) > ALERT! /dev/xvda2 does not exist. Dropping to a shell! > > > BusyBox v1.17.1 (Debian 1:1.17.1-8) built-in shell (ash) > Enter 'help' for a list of built-in commands. > > /bin/sh: can't access tty; job control turned off > (initramfs) > [ 600.488236] XENBUS: Timeout connecting to device: device/vbd/51714 > (local state 3, remote state 1) > [ 600.488328] XENBUS: Timeout connecting to device: device/vbd/51713 > (local state 3, remote state 1) > > >From what I see, the guest is unable to find the disk, which is > strange, because HVM guests work fine, and the disk is attached > correctly. Does this also happen when using file:/ backend (qdisk) > under Linux also? Is it a problem with Qemu or is it related to libxl? It doesn't happen under Linux; it is probably a problem with Qemu. Qemu uses the gntdev device (/dev/xen/gntdev) to open the grant table (necessary to implement xen backends in userspace). There doesn't seem anything equivalent on NetBSD, hence it fails... _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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