On 2016-09-12 16:44, Chris Murphy wrote:
On Mon, Sep 12, 2016 at 2:35 PM, Martin Steigerwald <mar...@lichtvoll.de> wrote:
Am Montag, 12. September 2016, 23:21:09 CEST schrieb Pasi Kärkkäinen:
On Mon, Sep 12, 2016 at 09:57:17PM +0200, Martin Steigerwald wrote:
Am Montag, 12. September 2016, 18:27:47 CEST schrieb David Sterba:
On Mon, Sep 12, 2016 at 04:27:14PM +0200, David Sterba wrote:
I therefore would like to propose that some sort of feature /
stability
matrix for the latest kernel is added to the wiki preferably
somewhere
where it is easy to find. It would be nice to archive old matrix'es
as
well in case someone runs on a bit older kernel (we who use Debian
tend
to like older kernels). In my opinion it would make things bit
easier
and perhaps a bit less scary too. Remember if you get bitten badly
once
you tend to stay away from from it all just in case, if you on the
other
hand know what bites you can safely pet the fluffy end instead :)

Somebody has put that table on the wiki, so it's a good starting
point.
I'm not sure we can fit everything into one table, some combinations
do
not bring new information and we'd need n-dimensional matrix to get
the
whole picture.

https://btrfs.wiki.kernel.org/index.php/Status

Great.

I made to minor adaption. I added a link to the Status page to my warning
in before the kernel log by feature page. And I also mentioned that at
the time the page was last updated the latest kernel version was 4.7.
Yes, thats some extra work to update the kernel version, but I think its
beneficial to explicitely mention the kernel version the page talks
about. Everyone who updates the page can update the version within a
second.

Hmm.. that will still leave people wondering "but I'm running Linux 4.4, not
4.7, I wonder what the status of feature X is.."

Should we also add a column for kernel version, so we can add "feature X is
known to be OK on Linux 3.18 and later"..  ? Or add those to "notes" field,
where applicable?

That was my initial idea, and it may be better than a generic kernel version
for all features. Even if we fill in 4.7 for any of the features that are
known to work okay for the table.

For RAID 1 I am willing to say it works stable since kernel 3.14, as this was
the kernel I used when I switched /home and / to Dual SSD RAID 1 on this
ThinkPad T520.

Just to cut yourself some slack, you could skip 3.14 because it's EOL
now, and just go from 4.4.
That reminds me, we should probably make a point to make it clear that this is for the _upstream_ mainline kernel versions, not for versions from some arbitrary distro, and that people should check the distro's documentation for that info.

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