On Thu, Mar 26, 2015 at 12:46:06PM +0000, George Dunlap wrote: > For some time, the blktap2 in-tree has bitrotted. Many years ago the > XenServer team at Citrix forked the code into a separate repository; > several attempts have been made to upstream those changes back into > Xen, to no avail. > > The blktap code at the moment is the only source of performant vhd > format integration. It's additionally in use by projects like the > COLO project. > > This patch series removes the in-tree blktap2 code and treats the > XenServer blktap tree as an upstream. I've gotten agreement from the > XenServer team to act as an upstream -- to accept patches fixing bugs, > to help track down errors, and to attempt to help fix build breakages > introduced by development. > > At the moment we're using the "blktap2" branch of XenServer's > blktap.git. (This has been sometimes known as "blktap 2.5".) This > branch is maintianed in order to provide a buildroot for OpenStack, > and has also been used by the CentOS xen packages for several years > now.
It's probably worth mentioning again that there is a kernel patch required. Some years ago I did some work to make the patch into a dkms module, but since then the patch and the kernel have moved on and I couldn't quite make it work any more; I'm afraid my kernel knowledge is a bit lacking. The current patches used in XenServer are on github here: https://github.com/xenserver/linux-3.x.pg/tree/master/master and the old dkms code is here: https://github.com/xapi-project/blktap-dkms In case anyone is interested...! Jon _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
