xen November 2007

xen@lists.fedoraproject.org

39 participants
39 discussions

RE: The BSOD 0x101 description
by Behpoornia, Kamal 23 Nov '07

23 Nov '07

The issue is described bellow: When running Windows Vista ultimate in a domain with two vcpus, and then do a heavy disk IO in domain0, the Vista will blue screen with such message "a clock interrupt was not received on a secondary processor within the allocated time interval" with Bug Check 0x101. This bug can always be reproduced by running the memory testing from Linux Performance Testing suite in domain 0. Note: domain 0 must use the hard disk as swap place. I need some helps from Linux expert. 1. Why the system is very slow when you access the hard disk frequently under Linux? 2. Does it allowed to preempt when do disk i/o access from 2.6.18 Linux kernel? 3. The detailed process of disk I/O handler under Linux. The interrupt status, the cpu status and buffer lock.

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xenbr0 missing on fedora 8
by Thomas von Steiger 19 Nov '07

19 Nov '07

Hello, I try to kickstart domU's on fedora 8 because there is no xenbr0. The only bridge i can found is virbr0 and this bridge is running on 192.168.22.0 My kickstart source is located on 192.168.1.0 and new guest's can't access this network. "virsh net-list" list network "default" with state "active" and "autostart". How I can bring back automatically xenbr0 on eth0 without create ifcfg-xenbr0 ? Many thanks Thomas No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.503 / Virus Database: 269.16.0 - Release Date: 16.11.2007 00:00

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Attaching a virtual CD to an existing domu?
by John Summerfield 19 Nov '07

19 Nov '07

Pls note, you cannot reply off-list.. I have a Debian Etch system, I want to install more software and it's asking for the DVD. I created the system a few days ago, I think this is the commaind I used: virt-install --name=DebianEtch --ram=384 --vcpus=1 --file=/var/lib/xen/images/DebianEtch.img --file-size=3 --vnc --hvm --cdrom=/var/lib/xen/images/debian-40r1-i386-DVD-1.iso --os-type=unix I've tried various incantations: [root@potoroo mail]# virsh attach-disk DebianEtch /var/lib/xen/images/debian-40r1-i386-DVD-1.iso /dev/hde --driver file --type cdrom --mode readonly libvir: Xen Daemon error : POST operation failed: (xend.err 'Device 8448 not connected') [root@potoroo mail]# virsh attach-disk DebianEtch /var/lib/xen/images/debian-40r1-i386-DVD-1.iso /dev/hdc --driver file --type cdrom --mode readonly libvir: Xen Daemon error : POST operation failed: (xend.err "Refusing to reconfigure device vbd:5632 to {'uname': 'file:/var/lib/xen/images/debian-40r1-i386-DVD-1.iso', 'mode': 'r', 'dev': '/dev/hdc:cdrom'}") [root@potoroo mail]# virsh attach-disk DebianEtch /var/lib/xen/images/debian-40r1-i386-DVD-1.iso /dev/hdb --driver file --type cdrom --mode readonly libvir: Xen Daemon error : POST operation failed: (xend.err 'Device 832 not connected') [root@potoroo mail]# None of those messages gives me any idea of what's wrong. I tried the xm command too: This is based on the manual page. The man page is wrong: xm block-attach DebianEtch file://var/lib/xen/images/debian-40r1-i386-DVD-1.iso /dev/hdd ro DebianEtch thinks its CD drive is /dev/hdc, so I really want the CD attached to that. [root@potoroo mail]# xm block-attach DebianEtch file://var/lib/xen/images/debian-40r1-i386-DVD-1.iso /dev/hdc r Error: Device /dev/hdc (5632, vbd) is already connected. Usage: xm block-attach <Domain> <BackDev> <FrontDev> <Mode> [BackDomain] Create a new virtual block device. [root@potoroo mail]# This seems to work: [root@potoroo mail]# xm block-attach DebianEtch file://var/lib/xen/images/debian-40r1-i386-DVD-1.iso /dev/hdb r [root@potoroo mail]# but DebianEtch doesn't know about it. How _should_ this work? I note block-detach doesn't seem to do anything: [root@potoroo mail]# xm block-detach DebianEtch 832 [root@potoroo mail]# xm block-detach DebianEtch 5696 [root@potoroo mail]# xm block-detach DebianEtch 5632 [root@potoroo mail]# xm list DebianEtch --long | less [root@potoroo mail]# xm block-list DebianEtch Vdev BE handle state evt-ch ring-ref BE-path 768 0 0 1 -1 -1 /local/domain/0/backend/vbd/3/768 5632 0 0 1 -1 -1 /local/domain/0/backend/vbd/3/5632 5696 0 0 1 -1 -1 /local/domain/0/backend/vbd/3/5696 832 0 0 1 -1 -1 /local/domain/0/backend/vbd/3/832 [root@potoroo mail]# Is there a particular reason the install DVD image doesn't, by default, remain attached? -- Cheers John -- spambait 1aaaaaaa(a)coco.merseine.nu Z1aaaaaaa(a)coco.merseine.nu -- Advice http://webfoot.com/advice/email.top.php http://www.catb.org/~esr/faqs/smart-questions.html http://support.microsoft.com/kb/555375 Please do not reply off-list

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Fedora 8, qemu-kvm and networking
by John Lagrue 19 Nov '07

19 Nov '07

Having installed F8 and tried out the latest virt-manager, I have to say I'm impressed. But........I am still utterly baffled by guest networking. What I *want* to do is have a Windows XP guest that runs on the same network as my laptop, the host; in other words, the guest should be able to access all the network that the laptop can see. But I can't for the life of me find out how to do this. I'll put up,if I have to, with the guest only working through the eth0 interface (though it would be nicer if it could work via wireless too). But I can't find any documentation that discusses this that isn't either at least a year old, or is written for someone who already knows the answer and understands the jargon of virtual networking. Can anyone help, or at least point me to a reasonably clear how-to ? Note that I am not running XEN ( I need Windows) and am doing this with qemu-kvm. John

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Minimal Fedora 8 Xen Setup for Laptop
by Mathew Brown 15 Nov '07

15 Nov '07

Hi, I was considering installing a minimal Fedora 8 setup with the Xen kernel and then performing most of my work in several different DomUs (perhaps Fedora of Ubuntu) as well as running Windows in a VMware setup (don't currently have hardware virtualization support). Note that this is on a laptop. Are there any specific issues that I should be aware of (such as suspend/resume issues, etc.) and does anyone have any specific recommendations? Thank you for your help. -- Mathew Brown mathewbrown(a)fastmail.fm -- http://www.fastmail.fm - Access your email from home and the web

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Re: [Fedora-xen] Prb manualy creating new VM.
by Guillaume 13 Nov '07

13 Nov '07

2007/11/13, Dustin Henning <Dustin.Henning(a)prd-inc.com>: > Try changing this line: > disk = [ 'phy:/dev/sda4,sda1,w' ] I change the line to "disk = [ 'phy:/dev/sda4,sda1,w' ]" but that not working too. > disk = [ 'phy:/dev/sda4,hda,w' ] I test this line previously in this day but same result. Is there a way to check if disk are detected by kernel while booting ? -- Guillaume

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Re: [Fedora-xen] Fedora's Xen Compared to XenExpress
by Richard W.M. Jones 13 Nov '07

13 Nov '07

thewird wrote: > --- "Richard W.M. Jones" <rjones(a)redhat.com> wrote: >> Mathew Brown wrote: >>> Hi, >>> I was wondering what the differences between Fedora 8's Xen and >>> XenExpress v4 are (besides the limits of 4GB or RAM and four >> virtual >>> hosts). Is the functionality and stability the same or is >> Fedora's >>> Xen more cutting-edge? Thank you for your help. >> I'm not very familiar with XenExpress, but I'm fairly sure that the >> management software used by XE is some proprietary code. Fedora uses >> >> libvirt and virt-manager for management, has no artificial >> limitations >> on memory, CPUs, guests etc., and is completely open source. > > Does Fedora 8 have any way to limit the network speed on the guests? I assume, though I've not tried it, that you should be able to use ordinary Linux mechanisms such as the 'tc(8)' command to enforce a traffic control and shaping on the vifX.0 devices. To be honest, it's a bit of an unusual request: mostly people complain about not getting enough network performance :-) Rich. -- Emerging Technologies, Red Hat - http://et.redhat.com/~rjones/ Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 03798903

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Prb manualy creating new VM.
by Guillaume 13 Nov '07

13 Nov '07

Hi, after a previous thread I start & some feedback you gave to me, about creating xen VM I ask you for your help. Here is the problem : `mount`. It was unable to find the disk/device to mount it as root (/). After the linux kernel bootup (domU) I create the VM by theses steps: i'm on fedora 8 with xen 3.1.0-13 a) #fdisk /dev/sda create a new part (sda4) type linux b)format it with #mkfs.ext3 /dev/sda4 c)Copy on it all files from my distrib with : #cp -a / /mnt/sda4 Edit the /mnt/sda4/etc/fstab to meet the reqs for the VM. d)Start the vm from config file (see below). #xm create testvm.conf -c Booom! failed :'( I check every thing i can, fstab, VM config file & test several things... But i was unable to fix the problem. Someone can help me, point out whats wrong ? Thanks, --- Guillaume ---begin of xenVM config file--- kernel = "/boot/vmlinuz-2.6.21-2950.fc8xen" ramdisk = "/boot/initrd-2.6.21-2950.fc8xen.img" root = "root=/dev/sda1 ro" #extra = "1" memory = "128" name = "Fedora-8-Guest" disk = [ 'phy:sda4,sda1,w' ] ---EOF--- ---begin of boot--- #xm create testvm.conf -c Using config file "./testvm.conf". Started domain Fedora-8-Guest Linux version 2.6.21-2950.fc8xen (kojibuilder(a)xenbuilder2.fedora.redhat.com) (gcc version 4.1.2 20070925 (Red Hat 4.1.2-32)) #1 SMP Tue Oct 23 12:24:34 EDT 2007 BIOS-provided physical RAM map: sanitize start sanitize bail 0 copy_e820_map() start: 0000000000000000 size: 0000000008800000 end: 0000000008800000 type: 1 Xen: 0000000000000000 - 0000000008800000 (usable) 0MB HIGHMEM available. 136MB LOWMEM available. NX (Execute Disable) protection: active Zone PFN ranges: DMA 0 -> 34816 Normal 34816 -> 34816 HighMem 34816 -> 34816 early_node_map[1] active PFN ranges 0: 0 -> 34816 ACPI in unprivileged domain disabled Detected 2001.289 MHz processor. Built 1 zonelists. Total pages: 34544 Kernel command line: root=/dev/sda1 ro Enabling fast FPU save and restore... done. Enabling unmasked SIMD FPU exception support... done. Initializing CPU#0 CPU 0 irqstacks, hard=c136c000 soft=c134c000 PID hash table entries: 1024 (order: 10, 4096 bytes) Xen reported: 2000.198 MHz processor. Console: colour dummy device 80x25 Dentry cache hash table entries: 32768 (order: 5, 131072 bytes) Inode-cache hash table entries: 16384 (order: 4, 65536 bytes) Software IO TLB disabled vmalloc area: c9000000-f4ffe000, maxmem 2d7fe000 Memory: 118016k/139264k available (2071k kernel code, 12968k reserved, 1080k data, 188k init, 0k highmem) virtual kernel memory layout: fixmap : 0xf5315000 - 0xf57fe000 (5028 kB) pkmap : 0xf5000000 - 0xf5200000 (2048 kB) vmalloc : 0xc9000000 - 0xf4ffe000 ( 703 MB) lowmem : 0xc0000000 - 0xc8800000 ( 136 MB) .init : 0xc1319000 - 0xc1348000 ( 188 kB) .data : 0xc1205e5e - 0xc1313fd4 (1080 kB) .text : 0xc1000000 - 0xc1205e5e (2071 kB) Checking if this processor honours the WP bit even in supervisor mode... Ok. Calibrating delay using timer specific routine.. 4070.78 BogoMIPS (lpj=8141572) Security Framework v1.0.0 initialized SELinux: Initializing. selinux_register_security: Registering secondary module capability Capability LSM initialized as secondary Mount-cache hash table entries: 512 CPU: L1 I cache: 32K, L1 D cache: 32K CPU: L2 cache: 2048K Checking 'hlt' instruction... OK. SMP alternatives: switching to UP code Freeing SMP alternatives: 13k freed Brought up 1 CPUs NET: Registered protocol family 16 Brought up 1 CPUs PCI: Fatal: No config space access function found PCI: setting up Xen PCI frontend stub Setting up standard PCI resources ACPI: Interpreter disabled. Linux Plug and Play Support v0.97 (c) Adam Belay pnp: PnP ACPI: disabled xen_mem: Initialising balloon driver. usbcore: registered new interface driver usbfs usbcore: registered new interface driver hub usbcore: registered new device driver usb PCI: System does not support PCI PCI: System does not support PCI NetLabel: Initializing NetLabel: domain hash size = 128 NetLabel: protocols = UNLABELED CIPSOv4 NetLabel: unlabeled traffic allowed by default NET: Registered protocol family 2 IP route cache hash table entries: 2048 (order: 1, 8192 bytes) TCP established hash table entries: 8192 (order: 4, 98304 bytes) TCP bind hash table entries: 8192 (order: 4, 65536 bytes) TCP: Hash tables configured (established 8192 bind 8192) TCP reno registered checking if image is initramfs... it is Freeing initrd memory: 7064k freed audit: initializing netlink socket (disabled) audit(1194965135.393:1): initialized VFS: Disk quotas dquot_6.5.1 Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) ksign: Installing public key data Loading keyring io scheduler noop registered io scheduler anticipatory registered io scheduler deadline registered io scheduler cfq registered (default) pci_hotplug: PCI Hot Plug PCI Core version: 0.5 rtc: IRQ 8 is not free. Non-volatile memory driver v1.2 Linux agpgart interface v0.102 (c) Dave Jones RAMDISK driver initialized: 16 RAM disks of 16384K size 4096 blocksize input: Macintosh mouse button emulation as /class/input/input0 Xen virtual console successfully installed as xvc0 Linux version 2.6.21-2950.fc8xen (kojibuilder(a)xenbuilder2.fedora.redhat.com) (gcc version 4.1.2 20070925 (Red Hat 4.1.2-32)) #1 SMP Tue Oct 23 12:24:34 EDT 2007 BIOS-provided physical RAM map: sanitize start sanitize bail 0 copy_e820_map() start: 0000000000000000 size: 0000000008800000 end: 0000000008800000 type: 1 Xen: 0000000000000000 - 0000000008800000 (usable) 0MB HIGHMEM available. 136MB LOWMEM available. NX (Execute Disable) protection: active Zone PFN ranges: DMA 0 -> 34816 Normal 34816 -> 34816 HighMem 34816 -> 34816 early_node_map[1] active PFN ranges 0: 0 -> 34816 ACPI in unprivileged domain disabled Detected 2001.289 MHz processor. Built 1 zonelists. Total pages: 34544 Kernel command line: root=/dev/sda1 ro Enabling fast FPU save and restore... done. Enabling unmasked SIMD FPU exception support... done. Initializing CPU#0 CPU 0 irqstacks, hard=c136c000 soft=c134c000 PID hash table entries: 1024 (order: 10, 4096 bytes) Xen reported: 2000.198 MHz processor. Console: colour dummy device 80x25 Dentry cache hash table entries: 32768 (order: 5, 131072 bytes) Inode-cache hash table entries: 16384 (order: 4, 65536 bytes) Software IO TLB disabled vmalloc area: c9000000-f4ffe000, maxmem 2d7fe000 Memory: 118016k/139264k available (2071k kernel code, 12968k reserved, 1080k data, 188k init, 0k highmem) virtual kernel memory layout: fixmap : 0xf5315000 - 0xf57fe000 (5028 kB) pkmap : 0xf5000000 - 0xf5200000 (2048 kB) vmalloc : 0xc9000000 - 0xf4ffe000 ( 703 MB) lowmem : 0xc0000000 - 0xc8800000 ( 136 MB) .init : 0xc1319000 - 0xc1348000 ( 188 kB) .data : 0xc1205e5e - 0xc1313fd4 (1080 kB) .text : 0xc1000000 - 0xc1205e5e (2071 kB) Checking if this processor honours the WP bit even in supervisor mode... Ok. Calibrating delay using timer specific routine.. 4070.78 BogoMIPS (lpj=8141572) Security Framework v1.0.0 initialized SELinux: Initializing. selinux_register_security: Registering secondary module capability Capability LSM initialized as secondary Mount-cache hash table entries: 512 CPU: L1 I cache: 32K, L1 D cache: 32K CPU: L2 cache: 2048K Checking 'hlt' instruction... OK. SMP alternatives: switching to UP code Freeing SMP alternatives: 13k freed Brought up 1 CPUs NET: Registered protocol family 16 Brought up 1 CPUs PCI: Fatal: No config space access function found PCI: setting up Xen PCI frontend stub Setting up standard PCI resources ACPI: Interpreter disabled. Linux Plug and Play Support v0.97 (c) Adam Belay pnp: PnP ACPI: disabled xen_mem: Initialising balloon driver. usbcore: registered new interface driver usbfs usbcore: registered new interface driver hub usbcore: registered new device driver usb PCI: System does not support PCI PCI: System does not support PCI NetLabel: Initializing NetLabel: domain hash size = 128 NetLabel: protocols = UNLABELED CIPSOv4 NetLabel: unlabeled traffic allowed by default NET: Registered protocol family 2 IP route cache hash table entries: 2048 (order: 1, 8192 bytes) TCP established hash table entries: 8192 (order: 4, 98304 bytes) TCP bind hash table entries: 8192 (order: 4, 65536 bytes) TCP: Hash tables configured (established 8192 bind 8192) TCP reno registered checking if image is initramfs... it is Freeing initrd memory: 7064k freed audit: initializing netlink socket (disabled) audit(1194965135.393:1): initialized VFS: Disk quotas dquot_6.5.1 Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) ksign: Installing public key data Loading keyring io scheduler noop registered io scheduler anticipatory registered io scheduler deadline registered io scheduler cfq registered (default) pci_hotplug: PCI Hot Plug PCI Core version: 0.5 rtc: IRQ 8 is not free. Non-volatile memory driver v1.2 Linux agpgart interface v0.102 (c) Dave Jones RAMDISK driver initialized: 16 RAM disks of 16384K size 4096 blocksize input: Macintosh mouse button emulation as /class/input/input0 Xen virtual console successfully installed as xvc0 Event-channel device installed. usbcore: registered new interface driver hiddev usbcore: registered new interface driver usbhid drivers/usb/input/hid-core.c: v2.6:USB HID core driver PNP: No PS/2 controller found. Probing ports directly. i8042.c: No controller found. mice: PS/2 mouse device common for all mice TCP bic registered Initializing XFRM netlink socket NET: Registered protocol family 1 NET: Registered protocol family 17 Using IPI No-Shortcut mode XENBUS: Device with no driver: device/vbd/2049 drivers/rtc/hctosys.c: unable to open rtc device (rtc0) Freeing unused kernel memory: 188k freed Write protecting the kernel read-only data: 795k Red Hat nash version 6.0.19 starting Mounting proc filesystem Mounting sysfs filesystem Creating /dev Creating initial device nodes Setting up hotplug. Creating block device nodes. Loading ehci-hcd.ko module Loading ohci-hcd.ko module Loading uhci-hcd.ko module USB Universal Host Controller Interface driver v3.0 Loading mbcache.ko module Loading jbd.ko module Loading ext3.ko module Loading scsi_mod.ko module SCSI subsystem initialized Loading sd_mod.ko module Loading libata.ko module Loading ata_piix.ko module Waiting for driver initialization. Loading ata_generic.ko module Loading BusLogic.ko module Creating root device. Mounting root filesystem. mount: could not find filesystem '/dev/root' Setting up other filesystems. Setting up new root fs setuproot: moving /dev failed: No such file or directory no fstab.sys, mounting internal defaults setuproot: error mounting /proc: No such file or directory setuproot: error mounting /sys: No such file or directory Switching to new root and running init. unmounting old /dev unmounting old /proc unmounting old /sys switchroot: mount failed: No such file or directory Booting has failed. ---End of boot--- ---begin of fstab (domU)--- # cat /mnt/etc/fstab /dev/sda1 / ext3 defaults 1 1 ---end of file---

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Fwd: Re: [Fedora-xen] Fedora's Xen Compared to XenExpress
by thewird 13 Nov '07

13 Nov '07

Note: forwarded message attached.

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Fedora's Xen Compared to XenExpress
by Mathew Brown 13 Nov '07

13 Nov '07

Hi, I was wondering what the differences between Fedora 8's Xen and XenExpress v4 are (besides the limits of 4GB or RAM and four virtual hosts). Is the functionality and stability the same or is Fedora's Xen more cutting-edge? Thank you for your help. -- Mathew Brown mathewbrown(a)fastmail.fm -- http://www.fastmail.fm - The way an email service should be

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xen November 2007