Arch Linux

PC

Member

Registered: 2010-03-16

Posts: 3

Increasing CPU limit for lts kernel

There seems to be limit of 16 CPUs for archlinux kernels. Ubuntu has limit of 8 for i386 version and 64 for x86_64.

May be it's desirable to increase core limit at least for kernel26-lts? (This kernel is for servers, isn't it?) Is there any benefits of core configured exactly sixteen CPUs?

I know, it's easy to change the limit and recompile core, but it's very inconvenient. Just installed archlinux on 4 Hexa-core CPU (total of 24) machine, few days ago. And my colleagues almost convinced me to install ubuntu because of default CPU limit

Last edited by PC (2010-08-28 23:28:31)

AndyRTR

Developer

From: Magdeburg/Germany

Registered: 2005-10-07

Posts: 1,642

Re: Increasing CPU limit for lts kernel

file a feature request.

.:B:.

Forum Fellow

Registered: 2006-11-26

Posts: 5,819

Website

Re: Increasing CPU limit for lts kernel

I don't think the 2.6.32-lts kernel is specifically aimed at servers. It's aimed at people wanting stability (and more corporate-oriented distributions - Ubuntu uses it in its 10.04 release).

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stqn

Member

Registered: 2010-03-19

Posts: 1,191

Website

Re: Increasing CPU limit for lts kernel

You are the exception, please don't put the burden of recompiling on *most* other people... (Not that I'm using the lts kernel at the moment, nor x86_64, but still.)

(I've spent two days building kernels with BFS in order to get a decent performance in games and videos because the kernel devs care more about machines with 4096 CPUs than single-core machines, so I'm a little bit bitter. And it's not yet working for me, apparently.)

ngoonee

Forum Fellow

From: Between Thailand and Singapore

Registered: 2009-03-17

Posts: 7,358

Re: Increasing CPU limit for lts kernel

You are the exception, please don't put the burden of recompiling on *most* other people... (Not that I'm using the lts kernel at the moment, nor x86_64, but still.)

(I've spent two days building kernels with BFS in order to get a decent performance in games and videos because the kernel devs care more about machines with 4096 CPUs than single-core machines, so I'm a little bit bitter. And it's not yet working for me, apparently.)

I think you misunderstand what he's requesting. The CPU limit does not affect performance AT ALL, except for slightly increasing (by a few kb) the size of the kernel image.

And I see you've been reading the BFS notes. While I do use BFS myself, I'd advise you that reading its 'documentation' is an extremely one-sided view into kernel development. In any case, it has no relevance into this particular thread.

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stqn

Member

Registered: 2010-03-19

Posts: 1,191

Website

Re: Increasing CPU limit for lts kernel

Edit: don't bother.

Last edited by stqn (2010-08-30 01:58:56)

anonymous_user

Member

Registered: 2009-08-28

Posts: 3,059

Re: Increasing CPU limit for lts kernel

Arch Linux has binary packages in its repos, so if a revised package was released, you would just download and install like usual. What would be the problem?

graysky

Wiki Maintainer

From: :wq

Registered: 2008-12-01

Posts: 10,696

Website

Re: Increasing CPU limit for lts kernel

file a feature request.

+1 for this suggestion: http://bugs.archlinux.org/newtask/proj1

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