[PATCH v5 00/18] xfs: sparse inode chunks

[Brian Foster]

On Fri, Feb 20, 2015 at 10:01:50AM +1100, Dave Chinner wrote:
> On Thu, Feb 19, 2015 at 02:10:34PM -0500, Brian Foster wrote:
> > On Thu, Feb 19, 2015 at 01:13:25PM -0500, Brian Foster wrote:
> > > Hi all,
> > > 
> > > Here's v5 of sparse inode chunks. The only real change here is to
> > > convert the allocmask helpers back to using the XFS bitmap helpers
> > > rather than the generic bitmap code. This eliminates the need for the
> > > endian-conversion hack and extra helper to export a generic bitmap to a
> > > native type. The former users of the generic bitmap itself have been
> > > converted to use the native 64-bit value appropriately.
> > > 
> > > The XFS bitmap code is actually not in userspace either so neither of
> > > these implementations backport cleanly to userspace. As it is, I've not
> > > included the sparse alloc/free code in my xfsprogs branch as this code
> > > currently isn't needed. Nothing in userspace that I've seen requires the
> > > ability to do a sparse inode allocation or free. I suspect if it is
> > > needed in the future, we can more easily sync the XFS bitmap helpers to
> > > userspace than the generic Linux bitmap code.
> > > 
> > > Thoughts, reviews, flames appreciated...
> > > 
> > 
> > Attached is a tarball of a set of xfsprogs patches to aid in testing
> > this patchset. I'm posting as a tarball because the core patches (e.g.,
> > the kernel patches) are obviously still in flux. The tarball includes
> > the following:
> > 
> > - general dependency backports
> > - core infrastructure backports (i.e., applicable patches from this v5
> >   sparse inode set)
> > - xfsprogs work for sparse inode support
> 
> You should probably base it on the libxfs-3.19-update branch rather
> than backport random patches into the current branch. This is what
> I'm basing the current rmap-btree work I'm doing on, and having the
> same libxfs structure on both sides makes it way easier to keep both
> sides up to date....
> 

I wasn't aware we had such a branch... I don't see it in my xfsprogs
repo. Perhaps that's because my repo is still based on the oss.sgi.com
repo?

> Give me a couple of hours and I'll push out the latest updates to
> that the branch...
> 

If you can make it available somewhere or another, I'll try to move
everything over.

Brian

> Cheers,
> 
> Dave.
> -- 
> Dave Chinner
> david at fromorbit.com