[Btrfs-devel] BTRFS and old kernels.

[Bron Gondwana]

On Sat, Apr 05, 2008 at 08:13:47PM +0100, Miguel Sousa Filipe wrote:
> My question is, is there sill interestest in having btrfs compatible
> with older kernels (like, 2.6.20 or 2.6.18)?
> I'll post (or repost) patches that I need for btrfs-unstable to
> build/work on this ppc system of mine.

It sort of depends who you ask.  Personally, I see value in being
compatible with as wide range of kernels as possible in a development
filesystem that you want people to be testing.  But then I'm not
doing any btrfs development, so I don't count for much.

Other people, well - Christoph Hellwig had this to say a little
while back in <20080207044835.GC4140 at lst.de> (rewrapped):

  On Wed, Feb 06, 2008 at 05:14:51PM -0500, Jeff Mahoney wrote:
  > -----BEGIN PGP SIGNED MESSAGE-----
  > Hash: SHA1
  >
  >  Kernels prior to 2.6.19 don't export file_ra_state_init().
  >  This patch adds the file_ra_state_init() from 2.6.18.

  Please put this somewhere else, a separate file and hopefully 
  only in your backports tree.  This is kernels from stoneage
  after all, not just one or two revisions back.

Bron ( not being particularly helpful or even answering your 
       question really )