I believe it is the consensus among those folks testing VFS union mounts that its not a workable alternative for Live CDs compared to AUFS in Jaunty. Therefore Andy Whitcroft has prepared a commit series to the Karmic kernel tree that will add AUFS back to our builds.
Following is an edited transcript of our discussion. ------------------------------------------------------------------------ On Sun, Jul 12, 2009 at 08:14:35PM -0600, Tim Gardner wrote: > As for aufs, I thought it was kind of a long shot from the beginning >> that we'd be able to avoid using it. Looks like I'm gonna have to >> cave on this one, huh? It was a useful exercise. A lot of good has come out of it. For one we now have a fuse based fallback for next cycle meaning we can have live cds from alpha-1 regardless of the state of the kernel support. We have forged good links and gained upstream karma from helping out in testing and driving the implementation fo VFS union mounts. I am hopeful we will have something upstream for LL even if we do have to have aufs in here for one more cycle. Plus although aufs is a bit of a mess, it is a whole heap less of a mess as a result of you pushing hard to get the maintainer to push it upstream. That meant that slurping it up seems to be a much easier exercise than one might have expected and the result is more reliable than we have seen in the past (as more people are paying him to maintain it). But yes, I think we are reaching the point where we have to say, VFS union mounts are not going to make 2.6.31 and therefore not going to make Karmic. If so then my personal opinion is that aufs2, while being a suboptimal external module, it is at least better than it has been in the Intrepid and Jaunty releases, and is a devil we know and foundations have installer support for. >From my testing, and I have been agressive with aufs2, I think it is of sufficient quality to handle livecd use. I would therefore suggest that I push up a version of aufs2 to my union mount PPA soon and offer it to installer folks for testing. Let them do some additional testing on it and let things play out from there. ------------------------------------------------------------------------ Any objections? rtg -- Tim Gardner tim.gard...@canonical.com -- Ubuntu-installer mailing list Ubuntu-installer@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-installer
