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Budoka
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Joined: 03 Jun 2012
Posts: 687
Location: Tokyo, Japan

PostPosted: Sat Aug 30, 2014 7:28 pm    Post subject: I am still confused about kernel sources. Reply with quote

Subject says it all. I am still confused about kernel sources because they never seem to match the kernel.org versions.

Maybe it will help if I state what I would like to have. If possible, the most current LTS kernel or stable kernel that is posted on kernel.org. I understand that this may be difficult with the stable versions because the Gentoo team must patch it and it changes often etc, but what about the longterm version? So for example currently kernel.org indicates that the most recent stable version is 3.16.1 and the most recent long term support is 3.14.17

Gentoo-Sources lists its available versions as:

Quote:
Available versions:
(3.4.103) ~3.4.103^bs
(3.4.9999) **3.4.9999^bs
(3.10.41-r1) 3.10.41-r1^bs
(3.10.53) ~3.10.53^bs
(3.10.9999) **3.10.9999^bs
(3.12.21-r1) 3.12.21-r1^bs
(3.12.26) ~3.12.26^bs
(3.12.9999) **3.12.9999^bs
(3.14.14) 3.14.14^bs
(3.14.16) ~3.14.16^bs
(3.14.17) ~3.14.17^bs
(3.15.10) ~3.15.10^bs
(3.16.1) ~3.16.1^bs


and Vanilla lists as :

Quote:
Available versions:
(3.2.62) ~3.2.62^bs
(3.4.103) ~3.4.103^bs
(3.10.53) ~3.10.53^bs
(3.12.27) ~3.12.27^bs
(3.14.17) (~)3.14.17^bs
(3.15.10) ~3.15.10^bs
(3.16.1) (~)3.16.1^bs


That means I have to autounmask 3.14.17. That is fine but is it safe to assume that it is "safe" to do so? By that I mean kernel.org states that
Quote:
that maintainers will provide bugfixes for this kernel revision for a much longer period of time.
so I assume that it is safe to use the version in Vanilla.

Since gentoo-sources is using it as the basis for its patching I guess I don't understand why it isn't listed as stable. Shouldn't I be able to use it safely?

Hopefully people will understand what I am asking. Thanks
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NeddySeagoon
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Joined: 05 Jul 2003
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PostPosted: Sat Aug 30, 2014 7:49 pm    Post subject: Reply with quote

Budoka,

vanillia-sources is the same as you would get from kernel.org - nothing added and nothing taken away.
Stable on kernel. org means the kernel devs think its stable.

Stable or Gentoo means that Gentoo devs think its stable. That takes longer, so 3.14.17 is still in testing on Gentoo.

gentoo-sources is vanillia-sources with patches backported from later kernels.
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NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.
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Budoka
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Joined: 03 Jun 2012
Posts: 687
Location: Tokyo, Japan

PostPosted: Sat Aug 30, 2014 7:55 pm    Post subject: Reply with quote

NeddySeagoon wrote:
Budoka,

vanillia-sources is the same as you would get from kernel.org - nothing added and nothing taken away.
Stable on kernel. org means the kernel devs think its stable.

Stable or Gentoo means that Gentoo devs think its stable. That takes longer, so 3.14.17 is still in testing on Gentoo.

gentoo-sources is vanillia-sources with patches backported from later kernels.


Thank you Neddy. So does this mean that it is safer to use the vanilla version vs the gentoo-sources version? I can't imagine that gentoo-sources would break a kernel by patching it. Or will the long term version eventually be made stable and I should wait? It just often seems to me that version numbers don't match. So for example I can wait for LTS 3.14.17 to be made stable in Gentoo and all of a sudden it will be gone and x-version is in the tree even though 3.14.17 it is still in kernel.org. Sorry for the trouble just really trying to understand the best way to upgrade my kernels.

ie: I was running linux-3.15.6 because until recently it was the most recent stable version on kernel.org but now it isn't even there. So I figured it is safer to roll back to the longterm which is 3.14.17 but it isn't stable on gentoo. So is it bad to unmask it and use it just as a general practice.
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NeddySeagoon
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PostPosted: Sat Aug 30, 2014 8:10 pm    Post subject: Reply with quote

Budoka,

I have always used the latest testing gentoo-sources.
Whats good for you, only you can determine.

I do keep 3 or 4 kernels in my grub.conf, so reverting is just a choice from the grub menu. This also makes it easy to recover from attempting to boot a dud kernel.
We all do that from time to time.
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NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.
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Duncan Mac Leod
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Joined: 02 May 2004
Posts: 251
Location: Germany

PostPosted: Sat Aug 30, 2014 9:37 pm    Post subject: Reply with quote

We are using 3.10.xx (currently 3.10.53) long-term kernels (gentoo-sources) on two production servers in our datacenter, no problems so far.

FYI: we are using gentoo-sources since 2004 (10 years, 3 months) on our servers and had never encountered a problem -> rock solid stuff 8) !!
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