APPLIED: [PATCH v1 0/4][DISCO] fs: add shiftfs

[Christian Brauner]

On Thu, Apr 04, 2019 at 09:06:50AM -0500, Tyler Hicks wrote:
> On 2019-04-04 09:03:01, Seth Forshee wrote:
> > On Thu, Apr 04, 2019 at 03:39:10PM +0200, Christian Brauner wrote:
> > > Hey everyone,
> > > 
> > > This is v1 of shiftfs with Tyler's comments addressed.
> > > 
> > > This is the patchset for shiftfs which Seth and I have been working on
> > > for a while. It is needed to transparently translate the on-disk ids of
> > > an underlaying filesystem into valid ids in a given user namespace.
> > > This work has been mentioned quite a bit lately since we need it for LXD
> > > and Anbox and has been targeted for inclusion in Disco.
> > > The main advantage of shiftfs is that it provides signficiant
> > > performance benefits as it lets us avoid recursively chowning the root
> > > filesystem for unprivileged containers when they are created or when
> > > their idmap is changed. This becomes very important with workloads where
> > > we are running a huge number of containers which Anbox and LXD both are
> > > currently doing. Other container runtimes will benefit from shiftfs in
> > > Ubuntu as well.
> > > Also, a big thank you to Seth who even with his regular busy schedule
> > > still always was ready to help out by discussing ideas, reviewing, and
> > > writing patches.
> > 
> > Applied to disco/master-next, thanks!
> 
> FWIW, I did just finish reviewing the delta between the two patch set
> revisions and the changes do look like they address my feedback
> comments.

Thanks, Tyler. :)

Christian