On Wed 02-09-15 16:47:24, Linus Torvalds wrote:

On Wed, Sep 2, 2015 at 11:45 AM, Darrick J. Wong
[off-list ref] wrote:

quoted

On Wed, Sep 02, 2015 at 05:52:01PM +0100, Mel Gorman wrote:

quoted

On the flip side, there does not appear to be any good reason for
keeping the ext3 driver around because if there ever is a case where an
old kernel is required to mount an ext3 filesystem then it appears the
ext4 developers would consider it a bug.

Yes, that would be a bug.

So the thing I'm happy to see is that the ext4 developers seem to
unanimously agree that maintaining ext3 compatibility is part of their
job, and nobody seems to be arguing for keeping ext3 around. As long
as any possible regressions from ext3 removal have a clear "yup, it's
on us" from the ext4 people,  I don't mind removing it. I was
expecting ext4 people to not be thrilled about supporting possible
legacy cases.

As a result, I'm personally convinced. I'll get around to the
filesystem pulls tomorrow unless something unexpected happens, and
expect to pull Jan's ext3-removal tree unless somebody suddenly speaks
up.

Thanks for pulling. Next time I will do a better job when writing a
changelog for such large change. We were discussing this on and off for
last two years with other ext4 developers so when I finally decided the
time for removal has come, it felt obvious to me...

								Honza
-- 
Jan Kara [off-list ref]
SUSE Labs, CR