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With the latest 2.6.4 in portage, is Preemptible Kernel ok ?
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bleakcabal
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PostPosted: Tue Mar 16, 2004 3:22 am    Post subject: With the latest 2.6.4 in portage, is Preemptible Kernel ok ? Reply with quote

With the latest 2.6.4 devlopment sources ( vanilla ) in portage, is setting Preemptible Kernel ok or are there still troubles and bugs related to it ?
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Fubarovic
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PostPosted: Tue Mar 16, 2004 12:58 pm    Post subject: Reply with quote

I've been using kernel preemption since v2.4.20 (ck-sources) without any problems. Now I'm running kernel 2.6.3-evil6 (every kernel since 2.4.20 had preemption enabled) with an XFS-partition and nVIDIA-drivers (this combination was known to cause filecorruption to XFS-partitions) and I'm not having any problems whatsoever, stability or filesystem wise.
I think since 2.6.0, kernel preemption is in the vanilla-tree, so it should be stable.
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ebrostig
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PostPosted: Tue Mar 16, 2004 2:25 pm    Post subject: Re: With the latest 2.6.4 in portage, is Preemptible Kernel Reply with quote

bleakcabal wrote:
With the latest 2.6.4 devlopment sources ( vanilla ) in portage, is setting Preemptible Kernel ok or are there still troubles and bugs related to it ?


Which problems are you hinting to?

I have also used it for generations of the kernel without any issues.

Erik
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bleakcabal
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PostPosted: Tue Mar 16, 2004 2:34 pm    Post subject: Reply with quote

I have seen threads on these boards and other sites where people said they were having problems with the Preemptible Kernel option in the 2.6.x kernels.

Like here for example : https://forums.gentoo.org/viewtopic.php?t=148020&highlight=preemptible+kernel

I remember reading similar stuff on www.osnews.com
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Lemma
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PostPosted: Tue Mar 16, 2004 3:03 pm    Post subject: Reply with quote

There was also a problem that was trigged (made more frequent, I think) by an activated preemtive flag in the kernel. Can't remember now, but it was during the 2.6-testing-x series; I run my servers using vanilla without preemting as a result, and I will continue untill I know that it is safe not to... I will try to dig up some info about it...
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Lemma
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PostPosted: Tue Mar 16, 2004 4:35 pm    Post subject: Reply with quote

Ok, found it.
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Jefklak
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PostPosted: Tue Mar 16, 2004 4:40 pm    Post subject: Reply with quote

I yust recompiled my 2.6.4-mm1 with preemptive sheduling and everything seems fine. Thanks for the usefull link, Lemma!
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Lemma
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PostPosted: Tue Mar 16, 2004 5:05 pm    Post subject: Reply with quote

Jefklak wrote:
I yust recompiled my 2.6.4-mm1 with preemptive sheduling and everything seems fine. Thanks for the usefull link, Lemma!
No problem, it's all about helping our fellow man, right :-).

I've had some problem with 2.6.4-mm1 and preemtive (couldn't boot all the way, the kernel killed itself trying to load ALSA...) but 2.6.4-mm2 is fine for me; the problem is that the preemtive-related problem in the link does not show for some time and so it is both hard to say if the kernel is stable or not and is therefore also very hard to correct. It may be gone, I don't know but as I said, until I do I will not enable preemtive on my servers (on my laptop, sure, but not the servers ;-)).
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