Xen Error Unable To Find Number For Device
Ping works in both directions, and the three way TCP handshake works -- it's just that once TCP connections are established, they are unidirectional Using 'ethtool -tx off -rx off' in This also makes it easy to log output, for example by using GNU screen. It's often useful, but generates a lot of data to wade through. Free forum by Nabble Edit this page OSDir.com xen-users Subject: Re: [Xen-users] Unable to find number for device(sda2) Date Index Thread: Prev Next Thread Index It worked!
This will let you see somewhat more information than simply following the logs. If I use "ls -l sda2" in /dev, I get the major and minor device numbers as 8, 1Please enlighten.Regards,Siddharth Wagh _______________________________________________ Xen-users mailing list [email protected] http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list We haven't come up with a great solution. Modify "/etc/grub.conf" so that the new kernel (step 2) is the default.
Often the problem is a version mismatch between the tools and the running Xen hypervisor. You may reopen this bug report if the solution does not work for you. Stacking a bar chart over a table Secret salts; why do they slow down attacker more than they do me? Instead of this, a more cleaner hack is to remove the block device volume check, in file nova/compute/api.py, method attach_volume Just comment out the first 3 lines of code: def attach_volume(self,
- Several functions may not work.
- Move vm from xen-3.4.2 on XenServer 5.6 Started by Albert Czarnecki , 18 June 2010 - 07:23 PM Login to Reply 15 replies to this topic Albert Czarnecki Members #1 Albert
- We added the command to the end of /etc/xen/scripts/network-bridge.
- So change the Status to VERIFIED.
- Why does the CPU utilization decrease when the amount of work being done is twice the original amount.The results repeatable and the variance for xentop is about 1% utilization.
If any revisions are required, please edit the "Technical Notes" field accordingly. if they aren't, you probably have a problem on the DomU side, either it has some really screwy routing, or you have some problem within the DomU network stack. (have such The kernel, as instructed, used the framebuffer as console rather than emulated serial console that we were expecting. you can compile glibc with the -mno-tls-direct-seg-refs option, or install the appropriate libc6-xen package for your distribution (both RedHat-like and Debian-like distros have created packages to address this problem.) With RedHat
Instead, Xen must trap the access, invert the sense of the segment address, and then allow the access to continue. Then, after retrying the same steps (without a host reboot), you should see the "Couldn't setup AIO context" in the syslog file, as described in comment #7. (2) Reboot the host Although the binaries installed in /usr/sbin may be correct, the underlying Python modules may be wrong. host userspace: -120, PV guest kernel: -194, 1 MB image file, xvdc 3.
Watch in the guest terminal opened in step 10 how devices get added. ** 13. DomU interface number increments with every reboot When Xen creates a domain, it looks at the vif= statement. However, I don't think it is a matter of patching those 3 lines. If the logs don't help, use set -x to make sure that the scripts are firing correctly, and closely examine the control flow of the non-Xen-specific parts of the system.
That's alright. Seventeen year old daughter wants to take international trip to meet someone she met online Please release me! host userspace: -120, PV guest kernel: -194, 100 MB image file, xvdb I'm obviously doing something wrong. import pdb Having done that, you can set a breakpoint.
Once you've got the backend sorted, you can address the frontend. These go through the rules in /etc/udev/rules.d/xen-backend.rules, which executes appropriate scripts in /etc/xen/scripts. These values do not correlate with the values of commands, such as »mpstat«, namely tothe extent that the xentop values are in comparison considerably excessive. This is a bit different from the patched kernel because there the xvda1 and xvda2 partitions didn't count in the 100 (so in total there were 102 block devices), while now
xvdb and xvdc are displayed by virt-manager (in dom0) alike. In this case, on the host you should change the VM to PV mode. In practical terms, it functions like network-nat, with a DHCP server handing out private addresses on the dom0. The machine is running Xen 3.1 has 4 physical CPUs.
All Rights Reserved Privacy & Terms Kernel Panic - not syncing i am not sure how to set the root parameter as well. If this is a paravirtualized domain, first try restarting xenconsoled: # /usr/sbin/xenconsoled (we see this problem especially when you have a mismatched kernel and userland) Then reconnect with xm console.
Check the virtual disk device name from inside the VM...
However, on account of the quite different architecture of both operating systemsthis can only be an indication. Let's start with a general overview of our approach to troubleshooting, which will help to put the specific discussion of Xen-related problems in context. Comment 8 Laszlo Ersek 2011-03-01 09:51:10 EST Under drivers/xen: xenbus/xenbus_probe.c -- xenbus_dev_probe() calls drv->probe() blkfront/blkfront.c -- blkfront_probe() calls talk_to_backend() -- talk_to_backend() calls xenbus_printf() to communicate the ring-ref, but fails -- talk_to_backend() This report is therefore being closed with a resolution of ERRATA.
The only symptom that matters is that the disks don't show up in the guest. Same error.sda1 (Linux) and sda2 (Linux LVM) are existing partitionsI am working on Fedora 8Siddharth On Mon, Dec 8, 2008 at 12:05 PM, Arpan Jindal
Check the disk configuration and make sure that /boot/grub/menu.lst exists in the filesystem on the first domU VBD. [note: There's some leeway -- pygrub will check a bunch of filenames, inluding What is meant by the phrase “Software can replace hardware”? dmesg and xm dmesg While the output of xm dmesg isn't a log in the usual sense of "log file," it's an important source of diagnostic output. DEBUG (DevController:539) hotplugStatusCallback /local/domain/0/backend/vkbd/4/0/hotplug-status In this case, however, these messages turned out to be a red herring.
no other limits hit. And who can say that they are wrong? We recommend uploading it somewhere web-accessible and sending a message to the xen-devel mailing list. Usually this is either because the disks aren't specified properly, or because there isn't a valid GRUB configuration in the domU.
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Error code 2 is ENOENT. You can also get copious debugging info by setting XENSTORED_TRACE=1 somewhere where xend's environment will pick it up -- perhaps at the top of /etc/init.d/xend, or in root's .bashrc. rpm will complain about missing dependencies; install those (but nothing else) with yum. Bad data in microcode data file (XEN) microcode: Error in the microcode data (In this case, the errors are harmless.
On the host, run the following script as root. [...] > xm block-attach rhel56pv tap:aio:/root/images/$X.img $DEV r So I didn't spell out "sysctl -p" in comment 16, because the steps I Is it legal to mortgage a property twice or more? Xen-devel can be interesting, but the high volume of patches might discourage people who aren't actively involved in Xen development. If I just say vif=[,] it creates two network devices for me, with random mac addresses.
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