Ext4 support for LTS kernels (was: Re: [PATCH 3.14] ext4: fix data exposure after a crash)

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On Mon, Oct 09, 2017 at 01:05:37PM +0200, Jan Kara wrote:
> On Fri 06-10-17 10:04:41, HUANG Weller (CM/ESW12-CN) wrote:
> > I checked the latest 3.14 source code 3.14.79. I didn't found the below patch.
> 
> Well, I'm not sure who runs the 3.14 stable tree (it's not listed at
> kernel.org). It's up to him to pick up patches...

The announcement of 3.14's End of Life as a stable kernel series was
announced in September 2016.  As far as I know, the fact that 3.14 is
no longer listed on kernel.org means that no one is maintaining 3.14
after Greg K-H declared it to be EOL'ed.

On a side note, I just recently finished an effort to update the ext4
patches for 3.14, 4.1, 4.4, and 4.9.  I've sent those backports and
cherry pick requests to stable@xxxxxxxxxxxxxxx.  For details of my
work, at:

https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git

There are testing notes in the signed git tags:

ext4-4.9.54-1
   - https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/tag/?h=ext4-4.9.54-1
ext4-4.4.91-1
   - https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/tag/?h=ext4-4.4.91-1
ext4-4.1.44-1
   - https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/tag/?h=ext4-4.1.44-1
ext4-3.18.74-1
   - https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/tag/?h=ext4-3.18.74-1

.... and on a "when Ted has time / interest basis", the ext4-3.18,
ext4-4.1, ext4-4.4, and ext-4.9 branches in the above repo will be
updated with a rebase against the latest LTS kernel and whatever
patches are needed to minimize xfstests failures that haven't yet
gotten accepted into the LTS kernel versions.

Getting changes into android-common and/or various SOC's BSP kernels
is left as an exercise to the reader.

I suspect that at some point soon, when 4.14 becomes released and
becomes a LTS kernel, I'm going to drop ext4-4.1 and replace it with
ext4-4.14, since very few people seem to be using the 4.1 LTS kernel,
and my time / effort is limited.  If someone is interested in helping
out, please contact me.

					- Ted



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