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 Forum index » Advanced Topics » Cutting edge
Kernel 2.6.27.47 for Puppy
Moderators: Flash, Ian, JohnMurga
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Iguleder


Joined: 11 Aug 2009
Posts: 1872
Location: Israel, somewhere in the beautiful desert

PostPosted: Wed 09 Jun 2010, 04:14    Post subject:  Kernel 2.6.27.47 for Puppy
Subject description: ext4 support in a retro kernel
 

In my eyes, Wary and 2.6.27.47 seem to be the best choice for a mainstream Puppy. Some people don't like the big size and compatibility of Lupu, so this may be the Puppy to replace 4.3.1 for many of us.

2.6.27.47 is the current kernel in the long-term support branch, so if we get it to work correctly ... it may be the best Puppy kernel ever. Barry already backported Squashfs 4 from 2.6.29 to it and added Aufs2, plus a patch that renames ext4dev to ext4, so it's usable.

I made my own patch that backports Squashfs 4 from the stable kernel (2.6.33.5) to 2.6.27.47 and it works perfectly.

The issue with 2.6.27.47 that really interests me is the possibility to backport ext4 from a later kernel to it. Basically, it should be a really tough case, because ext4 has undergone many changes since .27. I tried to port both ext4 from 2.6.33.5 and 2.6.32.15 with no success. I think ext4 relies on other parts of the kernel that need to be "upgraded" too.

It doesn't REALLY matter, because ext3 is very stable, but if one uses more than one distro or puplet, that could be problematic. I think Barry will eventually give up on ext4 in this retro kernel, but I still think it could be a great addition. And I truly believe it's possible, somehow.

So ... does anyone know how to do this correctly?

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BarryK
Puppy Master


Joined: 09 May 2005
Posts: 7047
Location: Perth, Western Australia

PostPosted: Wed 09 Jun 2010, 04:47    Post subject:  

Backporting ext4 is not something we can do (I don't think so anyway), it is very complicated. I posted some feedback from ext4 developers here:

http://bkhome.org/blog/?viewDetailed=01656

There are still more ext4 patches coming in for 2.6.27.48, so it's an on-going thing.

Despite the warnings from the developers, I wonder, it might be quite usable.

Anyway, I hope to release an alpha of Wary with this kernel very soon, and it will be very interesting to see how it works on old and new PCs, and on ext4 filesystems.

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raffy

Joined: 25 May 2005
Posts: 4759
Location: Manila

PostPosted: Wed 09 Jun 2010, 07:12    Post subject: Re: Kernel 2.6.27.47 for Puppy  

Iguleder wrote:
In my eyes .. this may be the Puppy to replace 4.3.1 for many of us.

Agreed - there is still no clear upgrade path from 4.3.1 for users.

We can keep broadcasting Lupu or Quirky, but at the end of the day, the question remains: where is the next Puppy?

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Ray MK


Joined: 05 Feb 2008
Posts: 760
Location: UK

PostPosted: Sun 11 Jul 2010, 17:40    Post subject:  

Hi

Maybe wary03 would be a good starting point?

Seems to be a good solid puppy and uses k2.6.27.47

Just a thought - very best regards - Ray
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