search for: loopx

Hello all, I have some DomU''s with root and swap images on files under Xen 3.0.0 Investigating some cases of boot failure of domUs, I stumbled upon the fact that when a domU is shutdown via xm shutdown, not all of its images are released from their /dev/loopX - devices. That is, for i in /dev/loop*; do losetup $i; done still shows output for that image. It seems to me that the image mounted first when the domU starts up is released properly on shutdown; the second one stays connected to its /dev/loop even after shutdown. Bug or feature ? Or doesnt m...

...04 with xen 3.2 on kernel 2.6.24-16-xen on amd64 hardware. Then I have created a new domU with xen-tools. The domU is using loopback-images. When I try to start the domU it ends with this: Error: Device 51713 (vbd) could not be connected. losetup /dev/loop0 /home/xen/domains/xx/swap.img failed. loopx is raised by 2 for every try. It looks like a classic and simple problem, but I cannot find where to look for a aolutiuon. -- Morten Christensen _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

...I wouldn''t recommend it. Using a loopback file stored over NFS can cause serious memory pressure in dom0 under high write load (it''s a native Linux problem). To figure out what''s going wrong for you, use losetup to attach the file to a loop device manually, then use phy:loopX in the vbd setup. > B) As per docs, I then tried NFS Root: > > I removed the disk="" line from my config file and put in > root = "/dev/nfsd" > nfs_server = "IP" > nfs_root = "/PathOfDiskFile/OnNfsServer" > > I...

Hi I had installed Xen-3.0.4 in Scientific linux 4 (kernel version 2.6.16.33) by following the instructions given in following link project-xen.web.cern.ch/project-xen/xen/howto_slcXen.html I ve created the guest Domain with fedora image of size 2.2GB , disk space as 10GB and the domain started successfully . when i logged into the xm console and checked the disk space its showing only 2.2GB ..

...: ... Done register platform. I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0 And I/O request error repeats as many times as many cores virtual cpus I set in config file. I tried changing memory size, number of cpus but this doesn''t help. I also tried using phy:/dev/loopX config with virtual devices created at dom0 but this also doesn''t help. Do you know the solution? # # Configuration file for the Xen instance staging.amberbit.com, created # by xen-tools 3.9 on Wed Jul 8 14:44:12 2009. # # # Kernel + memory size # kernel = ''/usr/lib/xen-3.2-...

...herefore the loop files must be being cached. It seems to me that dom0 shouldn''t need to cache the loop devices at all because the domUs will have their own buffer caches? Is there any way of stopping xen caching the loop devices? I thought about mapping a /dev/raw/rawX device onto /dev/loopX (which works) but the /dev/raw/rawX devices are character devices not block devices so I''m not sure how Xen would take to that. Can Xen use the new O_DIRECT feature directly when it opens the block device? I imagine its doing it from kernel space though so things may be different there....

This is a known issue. It has been fixed in xen unstable. The problem is loop device is not leased after the guest destroyed. If execute "losetup -d /dev/loopX" in domain0, the problem will be solved temporarily. >-----Original Message----- >From: xen-users-bounces@lists.xensource.com >[mailto:xen-users-bounces@lists.xensource.com] On Behalf Of Thomas Karsten >Sent: 2006年7月20日 17:26 >To: xen-users@lists.xensource.com >Subject: Re:...

<rant> I *swear*, I may get aggravated enough to write a drh - d *real* h. Between C7, with all the /tmpfs, and this debian 18.04 that has a dozen /snap all showing up.... All I want it to display is physical drive partition space.... </rant> mark

...hand written dd''s, the amount of disk activity is not fair shared among both. The paravirtualized domain shows on average 85% of I/O transfer rate in all the tests, against a poor 15% for the HVM domain (the iotop tool was used in dom0 to obtain the data about I/O transfers for qemu-dm and loopX processes). Our 2 questions are: - The same problem exists in the dom0 2.6.18 kernel? We cannot use the iotop tool to measure this on 2.6.18 since I/O per process accounting is not supported on it. However we suppose that could be possible put the two disk images in different HDD''s and us...

Hey, guys. I have a problem when installing syslinux 4.06, and I'd be grateful if someone could tell me how to solve the problem. My task - to install the bootloader on the virtual machine image. The image contains the MBR and the only partition with the file system ext4. The file system contains all the files for the guest OS. To install bootloader into the image of the guest OS, I use the

Hi, I wanted to create a new btrfs fs for my backups. When trying to mkfs.btrfs for that device, I''m getting "error checking /dev/loop2 mount status" With strace I see where the problem is: lstat("/dev/disk/by-id/ata-INTEL_SSDSA2M160G2GC_CVPO939201JX160AGN-par", 0x7fffa30b3cf0) = -1 ENOENT (No such file or directory) The problem is there is something missing

Hello group, I recently purchased an HP m7360n computer which has an Intel Pentium D 920 processor in it. Unfortunately there is no BIOS option to enable or disable VT. The board it sits on uses the Intel 945P chipset. If I am in linux and do a ''cat /proc/cpuinfo'' I get this: [root@localhost ia32]# cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family

Hi All, I have several Xen virtual machines within logical volumes using LVM2. I did not use disk images for performance reasons. Conventionally, if I want to clone my virtual machines, I have to dd the LV to an image file. But this consumes a lot of time and harddisk space. So, instead of doing that, I want to use losetup and kpartx with my logical volumes, which contain operating systems of