http://blog.gmane.org/gmane.comp.emulators.xen.user hourly 1 1901-01-01T00:00+00:00 http://gmane.org/img/gmane-25t.png http://gmane.org http://permalink.gmane.org/gmane.comp.emulators.xen.user/74260 <pre>Dear all, I have a PCIe device driver that I have been using on various Linux distributions and Kernel versions (2.6.x - 3.x.y) successfully all along. I recently set up a Xen environment with Linux Mint 12 and Xen Hypervisor 4.1. When I boot to Linux Mint, my driver still load (via insmod manually) successfully at Dom0 without any issue. I can do reads and write to the hardware device. But once booted to Xen, the driver failed to complete the driver load (via insmod manually) at Dom 0 and the console just hangs. From my debug messages, it appears it hangs because the driver doesn't receive any interrupt after a command is sent to the hardware device by writing a parameter to the mapped register. Once that register is written, the device is expected to DMA the command from the buffer allocated by the driver. The things that I can only think of that might have caused the problem are 1) IRQ mapping issue, or 2) DMA mapping issue, which I am not sure. What the driver does: Set up a command buffer: Buf_t *buf = kmalloc(BUF_SIZE*sizeof(buf_t), GFP_KERNEL); unsigned long buf_addr = __pa(buf); unsigned int buf_addr_low = (unsigned int)buf_addr; Tell device about the buffer: iowrite32(buf_addr_low, dev-&gt;pci_reg_map + BUF_ADR__LOW); Set up IRQ: if (pci_find_capability(dev, PCI_CAP_ID_MSI) &amp;&amp; (!pci_enable_msi(dev))) { if (request_irq(dev-&gt;irq, func_msi_interrupt, IRQF_SHARED, DRIVER_NAME, my_dev)) { return -ENODEV; } my_dev-&gt;intr_mode = INTERRUPT_MSI; } Ask device to fetch command from buffer (Expect interrupt after this after device fetched the command from buf. But interrupt did not happen.): iowrite32(buf_offset, dev-&gt;pci_reg_map + FETCH_CMD_REG); From dmesg, it looks like IRQ initialization is complete. [ 241.743769] My_driver initialization [ 241.743787] xen: registering gsi 16 triggering 0 polarity 1 [ 241.743793] xen_map_pirq_gsi: returning irq 16 for gsi 16 [ 241.743795] xen: --&gt; pirq=16 -&gt; irq=16 (gsi=16) [ 241.743801] Already setup the GSI :16 [ 241.743805] my-driver 0000:02:00.0: PCI INT A -&gt; GSI 16 (level, low) -&gt; IRQ 16 [ 241.743815] my-driver 0000:02:00.0: setting latency timer to 64 /proc/interrupts: CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7 ...... ...... 339: 0 0 0 0 0 0 0 0 xen-pirq-msi my-driver ...... ...... Any idea what might cause the problem? Is there anything we have to be enable/disable, use different functions, or do differently in drivers written for Xen Dom0 environment regarding the following? 1) Allocating a DMA buffer in driver to allow the device to DMA stuffs. 2) Requesting MSI irq. Please advise! Thanks a lot in advance!! Kenneth _______________________________________________ Xen-users mailing list Xen-users&lt; at &gt;lists.xen.org http://lists.xen.org/xen-users</pre> Kenneth Wong 2012-05-23T23:49:11 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74259 <pre>mea culpa, don't use xl with remus, you need xm... On 21 May 2012 01:12, Little Vaerivatnet &lt;vaerivatnet&lt; at &gt;gmail.com&gt; wrote: _______________________________________________ Xen-users mailing list Xen-users&lt; at &gt;lists.xen.org http://lists.xen.org/xen-users</pre> Little Vaerivatnet 2012-05-23T23:32:39 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74258 <pre> Awesome! Alpine Linux is great for lightweight systems. :) I am in the final stages of preparing a Ubuntu Linux based Dom0 LiveCD/USB. I should have it ready sometime this week hopefully, $dayjob has been getting in the way. Joseph. </pre> Joseph Glanville 2012-05-23T19:25:43 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74257 <pre> No. You already have access to int from Dom0 - that's what the address 192.168.1.x netmask 255.255.255.0 gateway 192.168.1.1 bit of the config does for you. The bridge itself becomes the interface in Dom0 - it should show as ethint in the output from ifconfig. The docs I found says it should work - not a setup I've used personally. Perhaps someone else can confirm if I've got the syntax correct. Do you get an error message ? Just "nothing" ? Does the bridge appear (brctl show) ? No, you just don't configure it at all. It will be bridged to a DomU and Dom0 will not have any access. Before starting any DomUs, brctl show should give something like : bridge name bridge id STP enabled interfaces ethext 8000.xxxxxxxxxxxx no eth0 ethint 8000.xxxxxxxxxxxx no ethdmz 8000.xxxxxxxxxxxx no After starting the first DomU as your firewall device, you should see it change to something like : ethext 8000.xxxxxxxxxxxx no vifa.b eth0 ethint 8000.xxxxxxxxxxxx no vifa.c ethdmz 8000.xxxxxxxxxxxx no vifa.d Not too sure about the "vifa.b" stuff, I give my DomUs explicit interface names, so I might see : ethext 8000.xxxxxxxxxxxx no fwext eth0 ethint 8000.xxxxxxxxxxxx no fwint ethdmz 8000.xxxxxxxxxxxx no fwdmz Eg, in the config for my firewall DomU, I might have something like : vif = [ 'bridge=ethext,vifname=fwext', 'bridge=ethint,vifname=fwint', 'bridge=ethdmz,vifname=fwdmz' ] I just like having meaningful names - makes things easier when you have a few VMs running. On the other hand, it causes some confusion when cloning a VM and I forget to change the names ! </pre> Simon Hobson 2012-05-23T19:22:42 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74256 <pre>Hi, Could someone using NFS tell of how their setup is? And what are the NFS mount point options? Thanks in advance. -- Jude Pereira judepereira&lt; at &gt;7terminals.com _______________________________________________ Xen-users mailing list Xen-users&lt; at &gt;lists.xen.org http://lists.xen.org/xen-users</pre> Jude Pereira 2012-05-23T17:22:15 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74255 <pre>I'm guessing that the benchmarks were run without any optimized drivers for Windows under Xen. That would be the only way to explain the dismal performance. Windows is known to perform poorly under Xen if you simply install Windows and don't install optimized drives. In all fairness, Windows performs poorly on native hardware if you don't install optimized drivers, so testers should expect to have to install optimized drivers when testing Windows regardless of the environment. I have emailed them about this, and I will post anything I hear back from them. -----Original Message----- From: xen-users-bounces&lt; at &gt;lists.xen.org [mailto:xen-users-bounces&lt; at &gt;lists.xen.org] On Behalf Of James Harper Sent: Tuesday, May 22, 2012 8:03 PM To: xen-users&lt; at &gt;lists.xen.org Subject: [Xen-users] Xen vs VMWare comparison paper One of my customers handed me a copy of this paper and asked why are we using xen if it is so slow... http://morse.colorado.edu/~tlen5710/12s/VMware.pdf which is a fairly damning report of performance under Xen in comparison to VMWare, citing worse than 50% overhead of Xen in comparison to physical. Has anyone seen this paper before? James _______________________________________________ Xen-users mailing list Xen-users&lt; at &gt;lists.xen.org http://lists.xen.org/xen-users </pre> admin< at >xenhive.com 2012-05-23T17:11:23 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74254 <pre>Hello, Please, can anybody see something missing or wrong with the following xenstore-ls output, something what could prevent xend to report vifs and disks to remus script ? I can't make my remus network buffering work, I think that's because of missing vif in a xmlrpc response to a remus script request (see below for more detail). Thanks a lot for any idea, Jix xenstore-ls -fp /local = "" (n0) /local/domain = "" (n0) /local/domain/0 = "" (r0) /local/domain/0/vm = "/vm/00000000-0000-0000-0000- 000000000000" (r0) /local/domain/0/device = "" (n0) /local/domain/0/control = "" (n0) /local/domain/0/control/platform-feature-multiprocessor-suspend = "1" (n0) /local/domain/0/control/platform-feature-xs_reset_watches = "1" (n0) /local/domain/0/memory = "" (n0) /local/domain/0/memory/target = "2801404" (n0) /local/domain/0/memory/static-max = "4294967292" (n0) /local/domain/0/memory/freemem-slack = "165844" (n0) /local/domain/0/guest = "" (n0) /local/domain/0/hvmpv = "" (n0) /local/domain/0/data = "" (n0) /local/domain/0/cpu = "" (r0) /local/domain/0/cpu/1 = "" (r0) /local/domain/0/cpu/1/availability = "online" (r0) /local/domain/0/cpu/0 = "" (r0) /local/domain/0/cpu/0/availability = "online" (r0) /local/domain/0/description = "" (r0) /local/domain/0/console = "" (r0) /local/domain/0/console/limit = "1048576" (r0) /local/domain/0/console/type = "xenconsoled" (r0) /local/domain/0/domid = "0" (r0) /local/domain/0/name = "Domain-0" (r0) /local/domain/0/device-model = "" (r0) /local/domain/0/device-model/2 = "" (r0) /local/domain/0/device-model/2/state = "running" (r0) /local/domain/0/backend = "" (r0) /local/domain/0/backend/qdisk = "" (r0) /local/domain/0/backend/qdisk/2 = "" (r0) /local/domain/0/backend/qdisk/2/51714 = "" (n0,r2) /local/domain/0/backend/qdisk/2/51714/frontend = "/local/domain/2/device/vbd/51714" (n0,r2) /local/domain/0/backend/qdisk/2/51714/params = "aio:xen//domains/ fsb.t.org/disk.img" (n0,r2) /local/domain/0/backend/qdisk/2/51714/frontend-id = "2" (n0,r2) /local/domain/0/backend/qdisk/2/51714/online = "1" (n0,r2) /local/domain/0/backend/qdisk/2/51714/removable = "0" (n0,r2) /local/domain/0/backend/qdisk/2/51714/bootable = "1" (n0,r2) /local/domain/0/backend/qdisk/2/51714/state = "4" (n0,r2) /local/domain/0/backend/qdisk/2/51714/dev = "xvda2" (n0,r2) /local/domain/0/backend/qdisk/2/51714/type = "qdisk" (n0,r2) /local/domain/0/backend/qdisk/2/51714/mode = "w" (n0,r2) /local/domain/0/backend/qdisk/2/51714/device-type = "disk" (n0,r2) /local/domain/0/backend/qdisk/2/51714/feature-barrier = "1" (n0,r2) /local/domain/0/backend/qdisk/2/51714/info = "0" (n0,r2) /local/domain/0/backend/qdisk/2/51714/sector-size = "512" (n0,r2) /local/domain/0/backend/qdisk/2/51714/sectors = "2097152" (n0,r2) /local/domain/0/backend/qdisk/2/51714/hotplug-status = "connected" (n0,r2) /local/domain/0/backend/qdisk/2/51713 = "" (n0,r2) /local/domain/0/backend/qdisk/2/51713/frontend = "/local/domain/2/device/vbd/51713" (n0,r2) /local/domain/0/backend/qdisk/2/51713/params = "aio:xen//domains/ fsb.t.org/swap.img" (n0,r2) /local/domain/0/backend/qdisk/2/51713/frontend-id = "2" (n0,r2) /local/domain/0/backend/qdisk/2/51713/online = "1" (n0,r2) /local/domain/0/backend/qdisk/2/51713/removable = "0" (n0,r2) /local/domain/0/backend/qdisk/2/51713/bootable = "1" (n0,r2) /local/domain/0/backend/qdisk/2/51713/state = "4" (n0,r2) /local/domain/0/backend/qdisk/2/51713/dev = "xvda1" (n0,r2) /local/domain/0/backend/qdisk/2/51713/type = "qdisk" (n0,r2) /local/domain/0/backend/qdisk/2/51713/mode = "w" (n0,r2) /local/domain/0/backend/qdisk/2/51713/device-type = "disk" (n0,r2) /local/domain/0/backend/qdisk/2/51713/feature-barrier = "1" (n0,r2) /local/domain/0/backend/qdisk/2/51713/info = "0" (n0,r2) /local/domain/0/backend/qdisk/2/51713/sector-size = "512" (n0,r2) /local/domain/0/backend/qdisk/2/51713/sectors = "262144" (n0,r2) /local/domain/0/backend/qdisk/2/51713/hotplug-status = "connected" (n0,r2) /local/domain/0/backend/vif = "" (r0) /local/domain/0/backend/vif/2 = "" (r0) /local/domain/0/backend/vif/2/0 = "" (n0,r2) /local/domain/0/backend/vif/2/0/frontend = "/local/domain/2/device/vif/0" (n0,r2) /local/domain/0/backend/vif/2/0/frontend-id = "2" (n0,r2) /local/domain/0/backend/vif/2/0/online = "1" (n0,r2) /local/domain/0/backend/vif/2/0/state = "4" (n0,r2) /local/domain/0/backend/vif/2/0/script = "/etc/xen/scripts/vif-bridge" (n0,r2) /local/domain/0/backend/vif/2/0/mac = "00:16:3e:c4:65:79" (n0,r2) /local/domain/0/backend/vif/2/0/ip = "192.168.2.201" (n0,r2) /local/domain/0/backend/vif/2/0/bridge = "xenbr0" (n0,r2) /local/domain/0/backend/vif/2/0/handle = "0" (n0,r2) /local/domain/0/backend/vif/2/0/feature-sg = "1" (n0,r2) /local/domain/0/backend/vif/2/0/feature-gso-tcpv4 = "1" (n0,r2) /local/domain/0/backend/vif/2/0/feature-rx-copy = "1" (n0,r2) /local/domain/0/backend/vif/2/0/feature-rx-flip = "0" (n0,r2) /local/domain/0/backend/vif/2/0/hotplug-status = "connected" (n0,r2) /local/domain/0/backend/console = "" (r0) /local/domain/0/backend/console/2 = "" (r0) /local/domain/0/backend/console/2/0 = "" (n0,r2) /local/domain/0/backend/console/2/0/frontend = "/local/domain/2/console" (n0,r2) /local/domain/0/backend/console/2/0/frontend-id = "2" (n0,r2) /local/domain/0/backend/console/2/0/online = "1" (n0,r2) /local/domain/0/backend/console/2/0/state = "1" (n0,r2) /local/domain/0/backend/console/2/0/domain = "fsb.t.org" (n0,r2) /local/domain/0/backend/console/2/0/protocol = "vt100" (n0,r2) /local/domain/2 = "" (n0,r2) /local/domain/2/vm = "/vm/d104f50c-7d86-4975-8662-e2827fad2cf7" (n0,r2) /local/domain/2/name = "fsb.t.org" (n0,r2) /local/domain/2/cpu = "" (n0,r2) /local/domain/2/cpu/0 = "" (n0,r2) /local/domain/2/cpu/0/availability = "online" (n0,r2) /local/domain/2/memory = "" (n0,r2) /local/domain/2/memory/static-max = "131072" (n0,r2) /local/domain/2/memory/target = "131073" (n0,r2) /local/domain/2/memory/videoram = "-1" (n0,r2) /local/domain/2/device = "" (n0,r2) /local/domain/2/device/suspend = "" (n0,r2) /local/domain/2/device/suspend/event-channel = "" (n2) /local/domain/2/device/vbd = "" (n0,r2) /local/domain/2/device/vbd/51714 = "" (n2,r0) /local/domain/2/device/vbd/51714/backend = "/local/domain/0/backend/qdisk/2/51714" (n2,r0) /local/domain/2/device/vbd/51714/backend-id = "0" (n2,r0) /local/domain/2/device/vbd/51714/state = "4" (n2,r0) /local/domain/2/device/vbd/51714/virtual-device = "51714" (n2,r0) /local/domain/2/device/vbd/51714/device-type = "disk" (n2,r0) /local/domain/2/device/vbd/51714/ring-ref = "8" (n2,r0) /local/domain/2/device/vbd/51714/event-channel = "9" (n2,r0) /local/domain/2/device/vbd/51714/protocol = "x86_32-abi" (n2,r0) /local/domain/2/device/vbd/51713 = "" (n2,r0) /local/domain/2/device/vbd/51713/backend = "/local/domain/0/backend/qdisk/2/51713" (n2,r0) /local/domain/2/device/vbd/51713/backend-id = "0" (n2,r0) /local/domain/2/device/vbd/51713/state = "4" (n2,r0) /local/domain/2/device/vbd/51713/virtual-device = "51713" (n2,r0) /local/domain/2/device/vbd/51713/device-type = "disk" (n2,r0) /local/domain/2/device/vbd/51713/ring-ref = "9" (n2,r0) /local/domain/2/device/vbd/51713/event-channel = "10" (n2,r0) /local/domain/2/device/vbd/51713/protocol = "x86_32-abi" (n2,r0) /local/domain/2/device/vif = "" (n0,r2) /local/domain/2/device/vif/0 = "" (n2,r0) /local/domain/2/device/vif/0/backend = "/local/domain/0/backend/vif/2/0" (n2,r0) /local/domain/2/device/vif/0/backend-id = "0" (n2,r0) /local/domain/2/device/vif/0/state = "4" (n2,r0) /local/domain/2/device/vif/0/handle = "0" (n2,r0) /local/domain/2/device/vif/0/mac = "00:16:3e:c4:65:79" (n2,r0) /local/domain/2/device/vif/0/tx-ring-ref = "768" (n2,r0) /local/domain/2/device/vif/0/rx-ring-ref = "769" (n2,r0) /local/domain/2/device/vif/0/event-channel = "11" (n2,r0) /local/domain/2/device/vif/0/request-rx-copy = "1" (n2,r0) /local/domain/2/device/vif/0/feature-rx-notify = "1" (n2,r0) /local/domain/2/device/vif/0/feature-sg = "1" (n2,r0) /local/domain/2/device/vif/0/feature-gso-tcpv4 = "1" (n2,r0) /local/domain/2/control = "" (n0,r2) /local/domain/2/control/shutdown = "" (n2) /local/domain/2/control/platform-feature-multiprocessor-suspend = "1" (n0,r2) /local/domain/2/control/platform-feature-xs_reset_watches = "1" (n0,r2) /local/domain/2/data = "" (n2) /local/domain/2/domid = "2" (n0,r2) /local/domain/2/store = "" (n0,r2) /local/domain/2/store/port = "1" (n0,r2) /local/domain/2/store/ring-ref = "539348" (n0,r2) /local/domain/2/console = "" (n2,r0) /local/domain/2/console/backend = "/local/domain/0/backend/console/2/0" (n2,r0) /local/domain/2/console/backend-id = "0" (n2,r0) /local/domain/2/console/limit = "1048576" (n2,r0) /local/domain/2/console/type = "xenconsoled" (n2,r0) /local/domain/2/console/output = "pty" (n2,r0) /local/domain/2/console/port = "2" (n2,r0) /local/domain/2/console/ring-ref = "539347" (n2,r0) /local/domain/2/console/tty = "/dev/pts/5" (n2,r0) /local/domain/2/image = "" (n0,r2) /local/domain/2/image/device-model-pid = "4162" (n0,r2) /local/pool = "" (n0) /local/pool/0 = "" (n0) /local/pool/0/other_config = "" (n0) /local/pool/0/description = "Pool-0" (n0) /local/pool/0/uuid = "9f71b915-9926-c39c-3804-72fa24ed3fef" (n0) /local/pool/0/name = "Pool-0" (n0) /vm = "" (n0) /vm/00000000-0000-0000-0000-000000000000 = "" (n0) /vm/00000000-0000-0000-0000-000000000000/on_xend_stop = "ignore" (n0) /vm/00000000-0000-0000-0000-000000000000/pool_name = "Pool-0" (n0) /vm/00000000-0000-0000-0000-000000000000/shadow_memory = "0" (n0) /vm/00000000-0000-0000-0000-000000000000/uuid = "00000000-0000-0000-0000-000000000000" (r0) /vm/00000000-0000-0000-0000-000000000000/on_reboot = "restart" (n0) /vm/00000000-0000-0000-0000-000000000000/image = "(linux (kernel '') (superpages 0) (nomigrate 0) (tsc_mode 0))" (n0) /vm/00000000-0000-0000-0000-000000000000/image/ostype = "linux" (n0) /vm/00000000-0000-0000-0000-000000000000/image/kernel = "" (n0) /vm/00000000-0000-0000-0000-000000000000/image/cmdline = "" (r0) /vm/00000000-0000-0000-0000-000000000000/image/ramdisk = "" (n0) /vm/00000000-0000-0000-0000-000000000000/on_poweroff = "destroy" (n0) /vm/00000000-0000-0000-0000-000000000000/bootloader_args = "" (n0) /vm/00000000-0000-0000-0000-000000000000/on_xend_start = "ignore" (n0) /vm/00000000-0000-0000-0000-000000000000/on_crash = "restart" (n0) /vm/00000000-0000-0000-0000-000000000000/xend = "" (n0) /vm/00000000-0000-0000-0000-000000000000/xend/restart_count = "0" (n0) /vm/00000000-0000-0000-0000-000000000000/vcpus = "2" (n0) /vm/00000000-0000-0000-0000-000000000000/vcpu_avail = "3" (n0) /vm/00000000-0000-0000-0000-000000000000/bootloader = "" (n0) /vm/00000000-0000-0000-0000-000000000000/name = "Domain-0" (n0) /vm/00000000-0000-0000-0000-000000000000/memory = "2735" (n0) /vm/d104f50c-7d86-4975-8662-e2827fad2cf7 = "" (n0,r2) /vm/d104f50c-7d86-4975-8662-e2827fad2cf7/uuid = "d104f50c-7d86-4975-8662-e2827fad2cf7" (n0,r2) /vm/d104f50c-7d86-4975-8662-e2827fad2cf7/name = "fsb.t.org" (n0,r2) /vm/d104f50c-7d86-4975-8662-e2827fad2cf7/image = "" (n0,r2) /vm/d104f50c-7d86-4975-8662-e2827fad2cf7/image/ostype = "linux" (n0,r2) /vm/d104f50c-7d86-4975-8662-e2827fad2cf7/image/kernel = "" (n0,r2) /vm/d104f50c-7d86-4975-8662-e2827fad2cf7/image/ramdisk = "" (n0,r2) /vm/d104f50c-7d86-4975-8662-e2827fad2cf7/image/cmdline = "" (n0,r2) /vm/d104f50c-7d86-4975-8662-e2827fad2cf7/start_time = "1337784350.32" (n0,r2) /libxl = "" (n0) /libxl/2 = "" (n0) /libxl/2/dm-version = "qemu_xen" (n0) On 21 May 2012 01:12, Little Vaerivatnet &lt;vaerivatnet&lt; at &gt;gmail.com&gt; wrote: _______________________________________________ Xen-users mailing list Xen-users&lt; at &gt;lists.xen.org http://lists.xen.org/xen-users</pre> Little Vaerivatnet 2012-05-23T16:32:29 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74253 <pre> Considering that you are using PVM, try a benchmark with bonnie++ to check non sequential read and write on your NFS partition. ---- Alison Barros da Silva On May 23, 2012, at 5:49 AM, Jude Pereira wrote: _______________________________________________ Xen-users mailing list Xen-users&lt; at &gt;lists.xen.org http://lists.xen.org/xen-users</pre> Alison Barros da Silva 2012-05-23T12:52:40 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74252 <pre>_______________________________________________ Xen-users mailing list Xen-users&lt; at &gt;lists.xen.org http://lists.xen.org/xen-users</pre> Sławek Kosowski 2012-05-23T10:56:23 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74251 <pre>Hi list, Is there a simple way to find out the memory space addresses in RAMthat is used by a running domU? I would like to have the physical addresses so that I can manipulate and write directly to the domU RAM from the dom0. Can anyone help me? Thank you!!! </pre> Sebastian Biedermann 2012-05-23T08:55:40 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74250 <pre>Hi, I'm having trouble setting up xen. Our VMs are on an NFS mount point. /var/lib/nfs/xen_storage is mounted over NFS If I cd to that directory, and I do a simple dd benchmark, it writes at 112 MB/s, The VM files are located here, they are preallocated from /dev/zero. If I start one DomU, the write speed inside that VM is ~7 MB/s(measured via dd). What could be the cause of this? If the VM is on local storage, then the write speeds are perfect(80 MB/s), but when they are over an NFS, they write very very slow. It certainly is not a NFS issue, as I can write to it at 112 MB/s, in a mounted directory. Any help is appreciated, Thanks in Advance, Jude _______________________________________________ Xen-users mailing list Xen-users&lt; at &gt;lists.xen.org http://lists.xen.org/xen-users</pre> Jude Pereira 2012-05-23T08:49:48 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74249 <pre>Hi, It seems Xen is conflict with the RT-Patch. When I configured the domain using pygrub, it cannot boot as well. Has anyone else tried using them together? I changed the kernel into 3.3.6 without rt-patch. This time using bootloader="pygrub" can boot the domU OK. But the corresponding configuration gives me the error like this: kernel="/boot/vmlinuz-3.3.6" error is: [xisisu&lt; at &gt;null-001cc0b1994f VM]$ sudo xl create -c vm2.run Parsing config file vm2.run Daemon running with PID 4907 Initializing cgroup subsys cpuset Initializing cgroup subsys cpu Linux version 3.3.6 (xisisu&lt; at &gt;null-001cc0b1994f.seas.wustl.edu) (gcc version 4.4.6 20110731 (Red Hat 4.4.6-3) (GCC) ) #1 SMP Mon May 14 17:29:53 CDT 2012 Command line: ro root=/dev/mapper/vg_null001cc0b1994f-lv_root rd_NO_LUKS rd_LVM_LV=vg_null001cc0b1994f/lv_swap LANG=en_US.UTF-8 rd_LVM_LV=vg_null001cc0b1994f/lv_root rd_NO_MD SYSFONT=latarcyrheb-sun16 rhgb crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM ACPI in unprivileged domain disabled Released 0 pages of unused memory Set 0 page(s) to 1-1 mapping BIOS-provided physical RAM map: Xen: 0000000000000000 - 00000000000a0000 (usable) Xen: 00000000000a0000 - 0000000000100000 (reserved) Xen: 0000000000100000 - 0000000020800000 (usable) Notice: NX (Execute Disable) protection missing in CPU! DMI not present or invalid. No AGP bridge found last_pfn = 0x20800 max_arch_pfn = 0x400000000 init_memory_mapping: 0000000000000000-0000000020800000 crashkernel: memory value expected No NUMA configuration found Faking a node at 0000000000000000-0000000020800000 Initmem setup node 0 0000000000000000-0000000020800000 NODE_DATA [000000001ffd9000 - 000000001fffffff] Zone PFN ranges: DMA 0x00000010 -&gt; 0x00001000 DMA32 0x00001000 -&gt; 0x00100000 Normal empty Movable zone start PFN for each node Early memory PFN ranges 0: 0x00000010 -&gt; 0x000000a0 0: 0x00000100 -&gt; 0x00020800 SFI: Simple Firmware Interface v0.81 http://simplefirmware.org SMP: Allowing 1 CPUs, 0 hotplug CPUs No local APIC present APIC: disable apic facility APIC: switched to apic NOOP PM: Registered nosave memory: 00000000000a0000 - 0000000000100000 Allocating PCI resources starting at 20800000 (gap: 20800000:df800000) Booting paravirtualized kernel on Xen Xen version: 4.1.2 (preserve-AD) setup_percpu: NR_CPUS:4096 nr_cpumask_bits:1 nr_cpu_ids:1 nr_node_ids:1 PERCPU: Embedded 27 pages/cpu &lt; at &gt;ffff88001fc00000 s81856 r8192 d20544 u2097152 Built 1 zonelists in Node order, mobility grouping on. Total pages: 131183 Policy zone: DMA32 Kernel command line: ro root=/dev/mapper/vg_null001cc0b1994f-lv_root rd_NO_LUKS rd_LVM_LV=vg_null001cc0b1994f/lv_swap LANG=en_US.UTF-8 rd_LVM_LV=vg_null001cc0b1994f/lv_root rd_NO_MD SYSFONT=latarcyrheb-sun16 rhgb crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM PID hash table entries: 4096 (order: 3, 32768 bytes) Checking aperture... No AGP bridge found Memory: 496888k/532480k available (5310k kernel code, 448k absent, 35144k reserved, 5876k data, 1488k init) Hierarchical RCU implementation. NR_IRQS:262400 nr_irqs:256 16 Console: colour dummy device 80x25 console [tty0] enabled console [hvc0] enabled allocated 2621440 bytes of page_cgroup please try 'cgroup_disable=memory' option if you don't want memory cgroups installing Xen timer for CPU 0 Detected 3378.250 MHz processor. Calibrating delay loop (skipped), value calculated using timer frequency.. 6756.50 BogoMIPS (lpj=3378250) pid_max: default: 32768 minimum: 301 Security Framework initialized SELinux: Initializing. Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes) Inode-cache hash table entries: 65536 (order: 7, 524288 bytes) Mount-cache hash table entries: 256 Initializing cgroup subsys cpuacct Initializing cgroup subsys memory Initializing cgroup subsys devices Initializing cgroup subsys freezer Initializing cgroup subsys net_cls Initializing cgroup subsys blkio Initializing cgroup subsys perf_event CPU: Physical Processor ID: 0 CPU: Processor Core ID: 0 SMP alternatives: switching to UP code Freeing SMP alternatives: 20k freed ftrace: allocating 21105 entries in 83 pages cpu 0 spinlock event irq 17 Performance Events: unsupported p6 CPU model 44 no PMU driver, software events only. NMI watchdog disabled (cpu0): hardware events not enabled Brought up 1 CPUs devtmpfs: initialized Grant tables using version 2 layout. Grant table initialized print_constraints: dummy: NET: Registered protocol family 16 PCI: setting up Xen PCI frontend stub bio: create slab &lt;bio-0&gt; at 0 ACPI: Interpreter disabled. xen/balloon: Initialising balloon driver. xen-balloon: Initialising balloon driver. vgaarb: loaded SCSI subsystem initialized 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 Switching to clocksource xen pnp: PnP ACPI: disabled NET: Registered protocol family 2 IP route cache hash table entries: 8192 (order: 4, 65536 bytes) TCP established hash table entries: 32768 (order: 7, 524288 bytes) TCP bind hash table entries: 32768 (order: 7, 524288 bytes) TCP: Hash tables configured (established 32768 bind 32768) TCP reno registered UDP hash table entries: 256 (order: 1, 8192 bytes) UDP-Lite hash table entries: 256 (order: 1, 8192 bytes) NET: Registered protocol family 1 platform rtc_cmos: registered platform RTC device (no PNP device found) audit: initializing netlink socket (disabled) type=2000 audit(1337752664.443:1): initialized HugeTLB registered 2 MB page size, pre-allocated 0 pages VFS: Disk quotas dquot_6.5.2 Dquot-cache hash table entries: 512 (order 0, 4096 bytes) msgmni has been set to 970 Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253) io scheduler noop registered io scheduler deadline registered io scheduler cfq registered (default) pci_hotplug: PCI Hot Plug PCI Core version: 0.5 pciehp: PCI Express Hot Plug Controller Driver version: 0.4 acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 Event-channel device installed. Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled Non-volatile memory driver v1.3 Linux agpgart interface v0.103 brd: module loaded loop: module loaded Fixed MDIO Bus: probed Initialising Xen virtual ethernet driver. blkfront: xvda: barrier: enabled xvda: xvda1 xvda2 ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver uhci_hcd: USB Universal Host Controller Interface driver i8042: PNP: No PS/2 controller found. Probing ports directly. i8042: No controller found mousedev: PS/2 mouse device common for all mice rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0 rtc_cmos: probe of rtc_cmos failed with error -38 EFI Variables Facility v0.08 2004-May-17 usbcore: registered new interface driver usbhid usbhid: USB HID core driver TCP cubic registered Initializing XFRM netlink socket NET: Registered protocol family 17 registered taskstats version 1 IMA: No TPM chip found, activating TPM-bypass! drivers/rtc/hctosys.c: unable to open rtc device (rtc0) Initializing network drop monitor service md: Waiting for all devices to be available before autodetect md: If you don't use raid, use raid=noautodetect md: Autodetecting RAID arrays. md: Scanned 0 and added 0 devices. md: autorun ... md: ... autorun DONE. VFS: Cannot open root device "mapper/vg_null001cc0b1994f-lv_root" or unknown-block(0,0) Please append a correct "root=" boot option; here are the available partitions: ca00 10485761 xvda driver: vbd ca01 512000 xvda1 00000000-0000-0000-0000-000000000000 ca02 9972736 xvda2 00000000-0000-0000-0000-000000000000 Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) Pid: 1, comm: swapper/0 Not tainted 3.3.6 #1 Call Trace: [&lt;ffffffff81520a5b&gt;] panic+0xbd/0x1da [&lt;ffffffff81520bb9&gt;] ? printk+0x41/0x48 [&lt;ffffffff81b032c4&gt;] mount_block_root+0x1db/0x28f [&lt;ffffffff81b033ce&gt;] mount_root+0x56/0x5a [&lt;ffffffff81b03542&gt;] prepare_namespace+0x170/0x1a9 [&lt;ffffffff81b02848&gt;] kernel_init+0x299/0x2af [&lt;ffffffff8152cea4&gt;] kernel_thread_helper+0x4/0x10 [&lt;ffffffff815239fc&gt;] ? retint_restore_args+0x5/0x6 [&lt;ffffffff8152cea0&gt;] ? gs_change+0x13/0x13 any idea? Thanks in advance! Best! Yours, Sisu On Wed, May 23, 2012 at 12:27 AM, Sisu Xi &lt;xisisu&lt; at &gt;gmail.com&gt; wrote: _______________________________________________ Xen-users mailing list Xen-users&lt; at &gt;lists.xen.org http://lists.xen.org/xen-users</pre> Sisu Xi 2012-05-23T05:58:32 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74248 <pre>Hi, all: I installed Xen 4.1.2 compiled from source, Dom0 is CentOS 6.2, using Linux kernel 3.4.0 compiled from source, after the rt-patch. Now I want to boot DomU using the patched Dom0 Kernel, my configuration file looks like: name="vm1" vcpus=1 cpus="1" memory=512 disk=['file:/home/xisisu/Desktop/VM/vm1.img,xvda,w'] vif=['bridge=eth0'] kernel="/boot/vmlinuz-3.4.0-rt7" extra="ro root=/dev/mapper/vg_null001cc0b1994f-lv_root rd_NO_LUKS rd_LVM_LV=vg_null001cc0b1994f/lv_swap LANG=en_US.UTF-8 rd_LVM_LV=vg_null001cc0b1994f/lv_root rd_NO_MD SYSFONT=latarcyrheb-sun16 rhgb crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM" on_reboot='restart' on_crash='restart' The item in menu.lst looks like: title CentOS (3.4.0-rt7) root (hd0,0) kernel /vmlinuz-3.4.0-rt7 ro root=/dev/mapper/vg_null001cc0b1994f-lv_root rd_NO_LUKS rd_LVM_LV=vg_null001cc0b1994f/lv_swap LANG=en_US.UTF-8 rd_LVM_LV=vg_null001cc0b1994f/lv_root rd_NO_MD quiet SYSFONT=latarcyrheb-sun16 rhgb crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM initrd /initramfs-3.4.0-rt7.img title Credit Xen 4.1.2, CentOS (3.4.0) root (hd0,0) kernel /xen.gz dom0_mem=2048M dom0_max_vcpus=1 dom0_vcpus_pin sched=credit module /vmlinuz-3.4.0-rt7 ro root=/dev/mapper/vg_null001cc0b1994f-lv_root rd_NO_LUKS rd_LVM_LV=vg_null001cc0b1994f/lv_swap LANG=en_US.UTF-8 rd_LVM_LV=vg_null001cc0b1994f/lv_root rd_NO_MD SYSFONT=latarcyrheb-sun16 rhgb crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM module /initramfs-3.4.0-rt7.img However, when I boot DomU in this way, it would halt. the output is: [xisisu&lt; at &gt;null-001cc0b1994f VM]$ sudo xl create -c vm2.run Parsing config file vm2.run Daemon running with PID 4030 Initializing cgroup subsys cpuset Initializing cgroup subsys cpu Linux version 3.4.0-rt7 (xisisu&lt; at &gt;null-001cc0b1994f.seas.wustl.edu) (gcc version 4.4.6 20110731 (Red Hat 4.4.6-3) (GCC) ) #2 SMP PREEMPT RT Wed May 23 00:03:32 CDT 2012 Command line: ro root=/dev/mapper/vg_null001cc0b1994f-lv_root rd_NO_LUKS rd_LVM_LV=vg_null001cc0b1994f/lv_swap LANG=en_US.UTF-8 rd_LVM_LV=vg_null001cc0b1994f/lv_root rd_NO_MD SYSFONT=latarcyrheb-sun16 rhgb crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM ACPI in unprivileged domain disabled Released 0 pages of unused memory Set 0 page(s) to 1-1 mapping BIOS-provided physical RAM map: Xen: 0000000000000000 - 00000000000a0000 (usable) Xen: 00000000000a0000 - 0000000000100000 (reserved) Xen: 0000000000100000 - 0000000020800000 (usable) Notice: NX (Execute Disable) protection missing in CPU! DMI not present or invalid. No AGP bridge found last_pfn = 0x20800 max_arch_pfn = 0x400000000 init_memory_mapping: 0000000000000000-0000000020800000 crashkernel: memory value expected No NUMA configuration found Faking a node at 0000000000000000-0000000020800000 Initmem setup node 0 0000000000000000-0000000020800000 NODE_DATA [000000001ffda000 - 000000001fffffff] Zone PFN ranges: DMA 0x00000010 -&gt; 0x00001000 DMA32 0x00001000 -&gt; 0x00100000 Normal empty Movable zone start PFN for each node Early memory PFN ranges 0: 0x00000010 -&gt; 0x000000a0 0: 0x00000100 -&gt; 0x00020800 SMP: Allowing 1 CPUs, 0 hotplug CPUs No local APIC present APIC: disable apic facility APIC: switched to apic NOOP Allocating PCI resources starting at 20800000 (gap: 20800000:df800000) Booting paravirtualized kernel on Xen Xen version: 4.1.2 (preserve-AD) setup_percpu: NR_CPUS:4096 nr_cpumask_bits:4096 nr_cpu_ids:1 nr_node_ids:1 PERCPU: Embedded 27 pages/cpu &lt; at &gt;ffff88001fc00000 s78592 r8192 d23808 u2097152 Built 1 zonelists in Node order, mobility grouping on. Total pages: 131186 Policy zone: DMA32 Kernel command line: ro root=/dev/mapper/vg_null001cc0b1994f-lv_root rd_NO_LUKS rd_LVM_LV=vg_null001cc0b1994f/lv_swap LANG=en_US.UTF-8 rd_LVM_LV=vg_null001cc0b1994f/lv_root rd_NO_MD SYSFONT=latarcyrheb-sun16 rhgb crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM PID hash table entries: 4096 (order: 3, 32768 bytes) Checking aperture... No AGP bridge found Memory: 496060k/532480k available (5188k kernel code, 448k absent, 35972k reserved, 6042k data, 1496k init) Preemptible hierarchical RCU implementation. NR_IRQS:262400 nr_irqs:256 16 Console: colour dummy device 80x25 console [tty0] enabled console [hvc0] enabled allocated 10485760 bytes of page_cgroup please try 'cgroup_disable=memory' option if you don't want memory cgroups installing Xen timer for CPU 0 Detected 3378.256 MHz processor. Calibrating delay loop (skipped), value calculated using timer frequency.. 6756.51 BogoMIPS (lpj=3378256) pid_max: default: 32768 minimum: 301 Security Framework initialized SELinux: Initializing. Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes) Inode-cache hash table entries: 65536 (order: 7, 524288 bytes) Mount-cache hash table entries: 256 Initializing cgroup subsys cpuacct Initializing cgroup subsys memory Initializing cgroup subsys devices Initializing cgroup subsys freezer Initializing cgroup subsys net_cls Initializing cgroup subsys blkio Initializing cgroup subsys perf_event CPU: Physical Processor ID: 0 CPU: Processor Core ID: 0 SMP alternatives: switching to UP code Freeing SMP alternatives: 16k freed ftrace: allocating 20439 entries in 80 pages cpu 0 spinlock event irq 17 Performance Events: unsupported p6 CPU model 44 no PMU driver, software events only. NMI watchdog: disabled (cpu0): hardware events not enabled Brought up 1 CPUs devtmpfs: initialized Grant tables using version 2 layout. Grant table initialized dummy: NET: Registered protocol family 16 PCI: setting up Xen PCI frontend stub bio: create slab &lt;bio-0&gt; at 0 ACPI: Interpreter disabled. xen/balloon: Initialising balloon driver. xen-balloon: Initialising balloon driver. vgaarb: loaded SCSI subsystem initialized 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 Switching to clocksource xen pnp: PnP ACPI: disabled NET: Registered protocol family 2 IP route cache hash table entries: 8192 and stops here. The xl info gives: host : null-001cc0b1994f.seas.wustl.edu release : 3.4.0-rt7 version : #2 SMP PREEMPT RT Wed May 23 00:03:32 CDT 2012 machine : x86_64 nr_cpus : 12 nr_nodes : 1 cores_per_socket : 6 threads_per_core : 2 cpu_mhz : 3378 hw_caps : bfebfbff:2c000800:00000000:00003f40:029ae3bf:00000000:00000001:00000000 virt_caps : hvm hvm_directio total_memory : 12277 free_memory : 9550 free_cpus : 0 xen_major : 4 xen_minor : 1 xen_extra : .2 xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64 xen_scheduler : credit xen_pagesize : 4096 platform_params : virt_start=0xffff800000000000 xen_changeset : unavailable xen_commandline : dom0_mem=2048M dom0_max_vcpus=1 dom0_vcpus_pin sched=credit cc_compiler : gcc version 4.4.6 20110731 (Red Hat 4.4.6-3) (GCC) cc_compile_by : xisisu cc_compile_domain : seas.wustl.edu cc_compile_date : Tue May 22 16:39:08 CDT 2012 xend_config_format : 4 Could anyone help with this? Thanks in advance. Best! Yours, Sisu </pre> Sisu Xi 2012-05-23T05:27:52 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74247 <pre> On May 22, 2012, at 4:10 AM, Fajar A. Nugraha wrote: As it happens, a couple days ago I tried KVM since I knew it required processor extensions to run, and I managed to get a Linux livecd to boot to console. I set aside tonight to play with it. I'll be posting the dmesg to Xen-devel in a bit. -Sam _______________________________________________ Xen-users mailing list Xen-users&lt; at &gt;lists.xen.org http://lists.xen.org/xen-users</pre> Sam Mulvey 2012-05-23T02:50:54 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74246 <pre> 100% agreed. You can't expect that paper to be objective given the source, can you? Anyway, we have some fairly large Xen deployments with multiple, clustered dom0 hosts and hundreds of Linux PV guests. I can tell you confidently that the I/O bottleneck is our SAN implementation, not the network, not blkback/blkfront, or anything else in Xen. I've gotten throughput of 200MB/s sequential from PV guests, which is the limit of our network, but unfortunately random I/O is the norm for us so we never really achieve throughput anywhere near our theoretical limit. My advice: If you want performance and you're willing to do it the "Xen way" with Linux PV guests (or maybe Windows HVM and suitable drivers), Xen will do fine. If on the other hand you want something that will work "just like VMWare" and support Windows natively with no special drivers, then yeah, the VMWare paper is probably really relevant to you. (And even then I thought VMWare needed virtual drivers to perform optimally. At least on Linux.) -Jeff </pre> Jeff Sturm 2012-05-23T01:56:13 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74245 <pre>Hadn't seen it, but the fact that they used 32 bit Windows Server 2003 means that I think it would be - to say the least - disingenuous to extrapolate those findings to Xen in general. Running windows means that it was running HVM and that's a killer for IO based testing. In other words, if you - like the vast majority of Xen users - are running PV guests, this is 100% irrelevant. On Tue, May 22, 2012 at 9:03 PM, James Harper &lt;james.harper&lt; at &gt;bendigoit.com.au _______________________________________________ Xen-users mailing list Xen-users&lt; at &gt;lists.xen.org http://lists.xen.org/xen-users</pre> John Sherwood 2012-05-23T01:16:06 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74244 <pre>On Wed, May 23, 2012 at 8:03 AM, James Harper &lt;james.harper&lt; at &gt;bendigoit.com.au&gt; wrote: IIRC vmware doesn't allow people to publish benchmark results like that. Anyway, taking a quick glance, the benchmark was using SQL 2005 (which implies windows), but searching for the words "pv", "para", or "driver" returns no result. So it's only normal that xen performs terrible on that benchmark. </pre> Fajar A. Nugraha 2012-05-23T01:13:52 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74243 <pre>One of my customers handed me a copy of this paper and asked why are we using xen if it is so slow... http://morse.colorado.edu/~tlen5710/12s/VMware.pdf which is a fairly damning report of performance under Xen in comparison to VMWare, citing worse than 50% overhead of Xen in comparison to physical. Has anyone seen this paper before? James </pre> James Harper 2012-05-23T01:03:06 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74242 <pre>We've installed xen 4.1, and our setup is as follows: Dom0 is ubuntu 11.04 DomU is centos 5.5, with el xen 2.6.18 kernel Dom0 is on local disk, DomU is on an NFS share. Dom0 write speeds are fast(50 MBps), while the DomU write speed is very low, 10 MBps, but I directly write to a drive on the NFS, say xvdb, the write speed is 50 MBps, which is normal. If I format that same drive, as ext3, and mount it, and then write a file of 1gb, it goes down to 10MBps. What am I missing here? Why does this happen and how do I resolve this issue? -- Jude Pereira judepereira&lt; at &gt;7terminals.com _______________________________________________ Xen-users mailing list Xen-users&lt; at &gt;lists.xen.org http://lists.xen.org/xen-users</pre> Jude Pereira 2012-05-22T13:37:37 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74241 <pre>Hi, Ian! Thanks for your reply! On Mon, May 21, 2012 at 05:33:59PM +0100, Ian Campbell wrote: I dropped the spaces, the line reads now: vif = [ 'mac=00:16:3e:00:00:11,bridge=xenbr0', 'mac=00:16:3e:00:00:12,bridge=xenbr1' ] But this change doesn’t solve my problem. With xl the vif interfaces are not attached to the existing bridges. If I add the vif interfaces manually to the bridges after the DomU start, network within DomU doesn’t work either. So it seems that xl is having other problems as well. I think I will stay with the working xm solution for now and wait for newer XEN releases. Shade and sweet water! Stephan </pre> Stephan Seitz 2012-05-22T13:17:02 http://permalink.gmane.org/gmane.comp.emulators.xen.user/74240 <pre>Hi Jack, Questions regarding XCP are best addressed to the xen-api&lt; at &gt; list, which I've now CCd. On Tue, 2012-05-22 at 10:37 +0100, 崔智经 wrote: _______________________________________________ Xen-users mailing list Xen-users&lt; at &gt;lists.xen.org http://lists.xen.org/xen-users</pre> Ian Campbell 2012-05-22T12:34:07 Search the mailing list at Gmane query http://search.gmane.org/?group=$group=gmane.comp.emulators.xen.user