Hello, I''ve been working on VM snapshots/CoW for Xen (as seen at Xen Summit this year). I''m happy to release my first version. There are some known issues with capturing page dirties for HVM guests. I think it''s related to the QEMU code (I believe I''m not catching the pages that QEMU dirties). However, it works with both 32-bit and 64-bit PV guests. This release includes modifications to Linux, Xen, and some tools (a library, FUSE fs, and testing tool). The FUSE file system will take a snapshot if you try to create a file in the directory you mount the xencowfs file system too. The testing tool pauses a domain, enables CoW, takes a dump of the CoW image, takes two live memory dumps, unpauses the domain for a bit, then takes another CoW image. It compares all the images and reports on which pages are different. These patches are against xen-unstable revision 19425, however I had no trouble patching them against the current revision of xen-unstable (19553). Please remember this is an alpha release, so there is likely to be some problems. Please let me know if you find any! Patrick _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel