similar to: [PATCH] blktap: Automatically start tapdisk-ioemu on demand

Hi everyone, as what I''ve learned form this link<http://wiki.xensource.com/xenwiki/blktap>, i know that when i specify tap:aio I’m actually using the blktap driver and finally using "tapdisk" to wirite to raw image file. but the truth is even when i delete /usr/sbin/tapdisk the domU can still boot on my machine with tap:aio protocol after a deeper look into the scene,

When I submitted the qcow2 patch for blktap, suggestions came up that the qemu block drivers should be used also for blktap to eliminate the current code duplication in ioemu and blktap. The attached patch adds support for a tap:ioemu pseudo driver. Devices using this driver won''t use tapdisk (containing the code duplication) any more, but will connect to the qemu-dm of the domain. In

The following two fixes by Jürgen Keil have been in qemu for a year now. They are still missing in ioemu. [Qemu-devel] PATCH: qcow2 image corruption http://lists.gnu.org/archive/html/qemu-devel/2007-03/msg00773.html [Qemu-devel] [PATCH] qcow2: release refcount table clusters of the old table, after growing the refcount table http://lists.gnu.org/archive/html/qemu-devel/2007-04/msg00043.html

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, while trying to get blktap based domus running with current Debian Xen 3.1.2 I came across a missing link: The tapdisk binary should be added to GLOBAL_SCRIPTS in xen-common/scripts/Makefile. Otherwise blktap based domus don't find their disks. blktapctrl forks tapdisk processes. Peter -----BEGIN PGP SIGNATURE----- Version: GnuPG

Hi All, I sent the patch to allow blktap to be able to booted as system bolume for PV-on-HVM. However, there was a problem that hdN and xvdN were not able to be specified at the same time. I made the patch to correct it as follows. - Whether hdN is defined first is checked. - If hdN is defined, xvdN is not replaced with hdN. Signed-off-by: Takanori Kasai <kasai.takanori@jp.fujitsu.com>

qemu-xen: Fix open_disk for blktap disks If blktap drives are registered properly, qemu code is much less likely to get confused by them. Use bdrv_new(), assign a device name and create an entry in drives_table for them. Signed-off-by: Kevin Wolf <kwolf@suse.de> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com

stubdom: do not build tapdisk as it it not supposed to build and we don''t need it Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com> diff -r 4024164e7572 stubdom/Makefile --- a/stubdom/Makefile Tue Jul 08 16:11:49 2008 +0100 +++ b/stubdom/Makefile Tue Jul 08 17:12:38 2008 +0100 @@ -190,7 +190,7 @@ [ -f ioemu/config-host.mak ] || \ ( cd ioemu ; \

With my qcow2 patch to blktap I contributed a bit to the mess, so here an attempt to clean up and remove at least some of the code duplication in the functions dealing with aio operations. This patch is mostly just moving code. Apart from renaming to get common names and such things, only very few changes are needed as big parts of the code were completely identical and obviously created by

Hi All, I'm seeing tapdisk processes not being terminated after a HVM vm is shutdown or migrated away. I don't see this problem with linux paravirt domu's, just windows hvm ones. xl.cfg: name = 'nathanwin' memory = 4096 vcpus = 2 disk = [ 'file:/mnt/gtc_disk_p1/nathanwin/drive_c,hda,w' ] vif = [ 'mac=00:16:3D:01:03:E0,bridge=vlan208' ] builder =

Although tapdisk has been instead of tapdisk-ioemu, but it still used on some old xen-3.2. So fix a performance problem here. -- Kernel aio will retry when encounter a block doesn''t allocated, then do async io, but O_DIRECT flag was there, so io_wait on sync data. And clean a little code style. Signed-off-by: Wei Kong <weikong.cn@gmail.com>

Package: src:blktap Version: 2.0.90-1 Severity: important Tags: sid jessie User: debian-gcc at lists.debian.org Usertags: ftbfs-gcc-4.8 The package fails to build in a test rebuild on at least amd64 with gcc-4.8/g++-4.8, but succeeds to build with gcc-4.7/g++-4.7. The severity of this report may be raised before the jessie release. tapdisk-logfile.c:166:23: error: argument to 'sizeof'

Package: src:blktap Version: 2.0.90-3 Severity: normal Tags: sid stretch User: debian-gcc at lists.debian.org Usertags: ftbfs-gcc-5 Please keep this issue open in the bug tracker for the package it was filed for. If a fix in another package is required, please file a bug for the other package (or clone), and add a block in this package. Please keep the issue open until the package can be built

The domU is using pygrub to boot its own 2.6.18.8-xen kernel. It can be booted successfully under 2.6.18.8-xen dom0 and xen 3.3.1. However when upgrade dom0 to 2.6.32.15 and xen 4.0.1-rc3-pre, the domU can not boot with tapdisk. I am wondering it is something related to the blktap driver. *When using tap:aio:* PATH/disk.img in domU disk configuration, the boot process hanged at a prompt: XENBUS:

The domU is using pygrub to boot its own 2.6.18.8-xen kernel. It can be booted successfully under 2.6.18.8-xen dom0 and xen 3.3.1. However when upgrade dom0 to 2.6.32.15 and xen 4.0.1-rc3-pre, the domU can not boot with tapdisk. I am wondering it is something related to the blktap driver. *When using tap:aio:* PATH/disk.img in domU disk configuration, the boot process hanged at a prompt: XENBUS:

# HG changeset patch # User Ian Campbell <ian.campbell@citrix.com> # Date 1316609964 -3600 # Node ID b43fd821d1aebc8671e684bfc285cda7a6002ff1 # Parent 206afa070919e3fe0b13a03f870ca2da44ab604a libxl: attempt to cleanup tapdisk processes on disk backend destroy. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> diff -r 206afa070919 -r b43fd821d1ae

stubdom: rename the ioemu-dm domain config file to domainname-dm, which is shorter, makes more sense, and sorts better. diff -r c9b516a77927 stubdom/README --- a/stubdom/README Mon Aug 04 11:29:45 2008 +0100 +++ b/stubdom/README Mon Aug 04 12:51:31 2008 +0100 @@ -10,6 +10,9 @@ of video memory for the HVM domain, you of video memory for the HVM domain, you need to avoid the need for ballooning,

Package: xen-utils-3.1-1 Version: 3.1.0-2 Severity: normal blktap support was re-enabled in 3.1.0-1, however the required 'tapdisk' executable needs to be symlinked in order to actually make it usable. For me, symlinking /usr/lib/xen-3.1-1/bin/tapdisk to /usr/sbin/tapdisk fixed the problem, and DomU's using blktap disks would run properly. -- System Information: Debian Release: 4.0

Hi all, I had met with a question about vhd format when i install xen 4.2.0 source code on suse11_x86_64_sp2. execute steps: 1)Install fully suse 11 sp2 to host pc 2)Boot from Xen kernel menu 3)Download xen 4.2.0 source code from http://xen.org/download/index_4.2.0.html 4)Download bin86-0.16.19.tar.gz cmake-2.8.9.tar.gz Dev86src-0.16.19.tar.gz gettext-0.18.1.1.tar.gz

Hello List, I''m using blktap on XCP 1.1 and developing a difference copy program for easy backup and remote archival. The idea is to read the BAT of VHD1 and sync it to BAT of VHD2 with BITMAP and the data blocks. Other way would be by adding a sha1 signature in each data block and comparing it with remote VHD. I tried to get some info from below programs but could not get required

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