ftp://sources.redhat.com/pub/dm/patches/2.6-unstable/2.6.11-rc3/2.6.11-rc3-udm2.tar.bz2 Same as udm1 with a bit of tidying up. Simplified the locking for now: it uses the per-device multipath lock everywhere. We can refine this later to address the performance issues. Updated version numbers and added a few more comments. Please re-test and review this patchset - I'd like to submit patches 7-10 to -mm after adding more documentation. Alasdair