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From: "K.R. Foley" <kr@cybsft.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org
Subject: Re: v2.6.20-rt1, yum/rpm
Date: Wed, 28 Feb 2007 04:16:04 -0600	[thread overview]
Message-ID: <45E55664.90407@cybsft.com> (raw)
In-Reply-To: <20070228081132.GA32405@elte.hu>

Ingo Molnar wrote:
> * K.R. Foley <kr@cybsft.com> wrote:
> 
>> Ingo Molnar wrote:
>>> i have released the v2.6.20-rt1 kernel, which can be downloaded from the 
>>> usual place:
>>>
>> I have a couple of questions regarding priorities of the softirqs, IRQ 
>> handlers, etc.
>>
>> With some exceptions, back in 2.6.18 and prior patches the IRQ threads 
>> were prioritized between 50 and 25 and the most of the softirqs were 
>> prioritized at 1? In newer patches it looks like they are all 
>> prioritized at 50?
>>
>> I was just curious what went into making these choices? I am just 
>> trying to better understand these decisions.
> 
> The basically random order-of-request_irq() prioritization was causing 
> problems (it worked for some but didnt work for others), so i got rid of 
> trying to auto-guess some priority order. Also, now that we've got 
> tools/scripts like set_kthread_prio and rtprio it seemed more consistent 
> to just not attempt to prioritize interrupts and softirqs at all, but to 
> keep them all 'in the middle' of the RT priority range.
> 
> 	Ingo
> 

Thanks.

-- 
	kr

  reply	other threads:[~2007-02-28 10:16 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-05  6:56 Ingo Molnar
2007-02-05  9:18 ` Serge Belyshev
2007-02-05  9:02   ` Ingo Molnar
2007-02-05 10:36 ` Sunil Naidu
2007-02-05 10:42   ` Peter Zijlstra
2007-02-05 10:22     ` Ingo Molnar
2007-02-05 11:15     ` Sunil Naidu
2007-02-05 12:59 ` Michal Piotrowski
2007-02-05 13:47   ` Ingo Molnar
2007-02-05 21:29     ` Michal Piotrowski
2007-02-05 14:25 ` Karsten Wiese
2007-02-05 15:17 ` Parag Warudkar
2007-02-05 21:50 ` Michal Piotrowski
2007-02-06  0:11 ` Michal Piotrowski
2007-02-06  1:14 ` Daniel Walker
2007-02-06 10:10 ` Arjan van de Ven
2007-02-07 12:32   ` Ingo Molnar
2007-02-06 10:30 ` Sunil Naidu
2007-02-27 17:39 ` K.R. Foley
2007-02-28  8:11   ` Ingo Molnar
2007-02-28 10:16     ` K.R. Foley [this message]
2007-04-26 13:57 ` v2.6.21-rt1 Ingo Molnar
2007-04-26 20:53   ` v2.6.21-rt1 Free Ekanayaka
2007-05-03 19:16   ` v2.6.21-rt1 - bug in asm-mips/atomic.h Tim Bird
2007-05-03 19:35     ` v2.6.21-rt1 - mips compile bugs Tim Bird
2007-05-17 18:46   ` v2.6.21-rt1 emin ak
2007-02-05 15:06 v2.6.20-rt1, yum/rpm Milan Svoboda

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