Displaying 20 results from an estimated 1000 matches similar to: "Creating a vm with a non-existent /dev/mapper/ tap2 device effectively hangs dom0 system"
2010 Sep 07
5
Remus blktap2 issue
Hello,
I have been playing around with Remus on Xen 4.0.1, attempting to fail-over
for an HVM domU.
I''ve run into some problems that I think could be related to tapdisk2 and
its interaction with how one sets up Remus disk replication in the domU
config file.
A few things I''ve noticed:
-The tap:remus:backupHostIP:port|aio:imagePath notation does not work for
me, although this
2010 Dec 10
4
qemu VS tapdisk2 VS blkback benchmarks
Hi all,
as promised I run some simple benchmarks using tapdisk2 and the new qemu
as disk backends.
If you are in a hurry skip to the last section to see the test results.
SOFTWARE REQUIREMENTS
---------------------
In order to reproduce these results you need to use the new qemu with
linux aio and O_DIRECT as disk backend:
- apply the libxl patches that Anthony sent to the list a little while
2010 Oct 20
1
Bug#586772: xen-utils-4.0: No block tap backends available
Package: xen-utils-4.0
Version: 4.0.1-1
Severity: normal
Due to license issues this version of Xen does not include the blktap2 backend (tapdisk2) and associated utilities (vhd-util, etc.). The decision was made to disable the blktap v1 kernel module (the default is now blktap2). As a result we can't use any tap devices which means worse performance than previousl. Since blktap1 was available
2011 Apr 03
6
Memory sharing
Hi,
Currently i''m going through the source codes of tools/blktap2. I need to
find-out where blktap2 calls
1. mem_share_nominate()
2. mem_sharing_share_page() functions to do the memory sharing on HVM
guests.
Can someone please provide me some guidance on blktap2 driver.
Thanks,
Harshan
_______________________________________________
Xen-devel mailing list
2011 Jun 13
3
blktapctrl not running
Hi,
I am running XEN 4.1 on Debian 6 and I cannot find blktapctrl process
running. xend is started. I installed XEN from 4.1 source following
instructions here:
http://wiki.xensource.com/xenwiki/XenParavirtOps
http://wiki.xensource.com/xenwiki/Xen4.0
Should there be a blktapctrl process running in this version?
The problem I have encountered is that I can create a domain on a raw disk
image but
2010 Sep 20
1
Xen 4.0.1, tap vs tap2, blktap2 documentation, and gentoo-xen-kernel problem
Hi,
I''ve been testing Xen 4.0.1 with kernel 2.6.34.5 +
http://gentoo-xen-kernel.googlecode.com/files/xen-patches-2.6.34-4.tar.bz2,
and one of the things that I noticed immediately is there are two
problems with tapdisk and this combination.
First, the syntax "disk = [''tap:tapdisk:aio: ..." no longer works.
When tested with HVM domU, it boots, but there was no disk
2012 Aug 13
0
How to install pv guests with tap2:aio for remus
Hi Guys,
I''m working with:
1. xen 4.1;
2. dom0 ubuntu kernel 3.2
I''m trying to run remus with disk replication (I can run without disk
replication). But I read I need to use tap2 <
http://nss.cs.ubc.ca/remus/doc.html>.
Well... first I tried to create a pv guest. Then I take this guest.cfg:
1. name = "ubuntu-ha"
2. memory = 256
3. disk =
2013 Mar 26
0
VM hangs during bootup when use Tap2 disk type
Hi, ALL
When I use "tap" config, the VM is OK. Than I replace disk config
"tap" with "tap2", And VM hangs during bootup. I use "xm list" to list
vm and find the time of hanged VM is growing fast.
After VM hangs, we can not create other VMs. It prints "Error: Device
0 (vif) could not be connected. Hotplug scripts not working" . How can
I fix it?
2012 Feb 18
1
Mounting filesystems with blktap2
For those wanting to know how to mount filesystems through blktap2
here is how you do it, as I couldn''t find it fully documented.
The instructions on the blktap2 readme file are rather out of date.
You can mount them under Dom0 like so.
e.g. to mount a vhd file,
sudo xm block-attach 0 tap2:vhd:/home/xen/xenwin7-persist.vhd xvdb w 0
Now the device should appear under /dev
ls
2012 May 11
15
Errors of doing "make install-tools" with xen-4.2-unstable?
Hi,
When I do the "make install-tools" with xen-4.2-unstable, there are some
errors about "warn_unused_result".
Is it the error in code or the error in the compiling environment? Thank
you so much.
gcc -O1 -fno-omit-frame-pointer -m64 -g -fno-strict-aliasing -std=gnu99
-Wall -Wstrict-prototypes -Wdeclaration-after-statement -D__XEN_TOOLS__
-MMD -MF .tapdisk-queue.o.d
2011 Jun 29
10
xen 4.1.1 + 3.0.0-rc5 dom0 + blktap2
Hi,
I''m currently trying xen 4.1.1 with the 3.0.0-rc5 (heard that it now
contains the xen code to run as front or back xen domain).
Everything seems to run fine, except that I am trying since a few hours
to mount a .vhd file in the dom0.
What I tried so far:
to create a blank vhd file (this is working):
host# vhd-util create -n /storage/test.vhd -s 20G
Then i try to mount the file
2010 Feb 11
6
tapdisk2 segfaults with xen-unstable+linux-2.6-pvops
Hi,
I''m trying to run guest pv vm on my machine running xen-unstable
(xen-4.0.0-rc3.pre + linux-2.6-pvops). However, I get blktap error:
"
sudo xm create -c xmexample
Using config file "./xmexample".
Error: Failed to create device.
stdout: unrecognized child response
stderr:
Check that target "/home/ashish/xen/hd.img" exists and that blktap2
driver
2012 Oct 27
8
RFH: loopback & blktap(2) and CDROM
Hello,
I''m currently trying to understand some problems I had in the past with mixing
look-back with blktap(2) for HV and PV domains. I''m stuck reading the source
code, so I''d like to get some help from the list. Interrupt me if I got
something fundamentally wrong in my understanding so far:
1. With pure-HV the domU gets an emulated IDE (or whatever) disk. The
2011 Sep 07
3
Updated git locations now that kernel.org is no longer hosting?
Hi,
Just wondering if anyone can point me to the new locations for
xen/next-3.0 repo?
git.kernel.org doesn''t appear to be coming back up
(http://www.theregister.co.uk/2011/09/06/linus_torvalds_dumps_kernel_for_github/)
and the XenParavirtOps wiki page still refers to that. Searching the
list didn''t seem to come up with anything.
Thanks,
Nathan
--
Nathan
2010 Jan 28
31
[PATCH 0 of 4] aio event fd support to blktap2
Get blktap2 running on pvops.
This mainly adds eventfd support to the userland code. Based on some
prior cleanup to tapdisk-queue and the server object. We had most of
that in XenServer for a while, so I kept it stacked.
1. Clean up IPC and AIO init in tapdisk-server.
[I think tapdisk-ipc in blktap2 is basically obsolete.
Pending a later patch to remove it?]
2. Split tapdisk-queue into
2010 Dec 21
4
tap2:remus:backup_ip:9000|aio:/path_to_disk.img not working - OSError: [Errno 2] No such file or directory
Hello,
I''m using Xen (installed from source - "hg clone
http://xenbits.xen.org/xen-4.0-testing.hg") on Debian Lenny. Dom0 kernel is
2.6.32-bpo.5-xen-686.
Until now I have successfully ran the Lucid Ubuntu as domU guest, defining
disks as (and also as file:):
disk = [''tap2:aio:/home/xen/domains/lucid/disk.img,xvda1,w'',
2011 Jul 20
12
Re: Re: XAPI on debian - sr-create issue
You''re right scout the last line. Out looks like xapi is waiting on tapdisk to plug a key into xenstore. Perhaps a udev rule problem? Perhaps someone who knows more about tapdisk than I well be able to diagnose this tomorrow.
Mike
Sent from Samsung tablet
Sébastien RICCIO <sr@swisscenter.com> wrote:
Of course, here it is attached.
Last line seems interesting. However tapdisk2
2011 Mar 16
3
[PATCH] tools: do not link against unused libraries
# HG changeset patch
# User Ian Campbell <ian.campbell@citrix.com>
# Date 1300271932 0
# Node ID 7e326d27d899a3133479c8b7c983f660cdeda48c
# Parent f35234b6636a0410a7d5eaa409e98ebe59080e4f
tools: do not link against unused libraries.
A fair few things under tools link against libraries which they don''t
even use.
Most of this appears to come from copy-and-pasting previous Makefile
2011 Aug 04
3
[Q] VmError: Disk isn''t accessible with tap2:tapdisk:vhd
I''m newbie Xen-4.1.1
I''m trying to boot DomU with the following configuration.
Sometime DomU boot, but sometime boot failed
I''m not sure what is the problem.
I can attach that image with tap-ctl on Dom0.
Does anybody advice me about this problem??
Sincerely
* Environment
OS : Scientific Linux 6.1 x86_64
Kernel : 2.6.32.43
2010 Jun 25
6
Dom0 reboot when several VM reboot at the same time
Hi folks,
I met a problem: when 6 VM reboot at the same time, 3:00 morning, the Dom0
reboot it self:
Xen version is 4.0.0, VMs are windows 2003 with redhat pv, they will update
and reboot itself every 3:00 AM.
# last
... ...
admin pts/0 10.247.1.1 Fri Jun 25 03:40 - 04:30 (00:50)
reboot system boot 2.6.31.13 Fri Jun 25 11:16 (00:-3)
admin pts/0