LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Ingo Molnar <mingo@elte.hu>
To: "K.R. Foley" <kr@cybsft.com>
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 09:11:32 +0100	[thread overview]
Message-ID: <20070228081132.GA32405@elte.hu> (raw)
In-Reply-To: <45E46CB4.1080009@cybsft.com>


* 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

  reply	other threads:[~2007-02-28  8:18 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 [this message]
2007-02-28 10:16     ` K.R. Foley
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20070228081132.GA32405@elte.hu \
    --to=mingo@elte.hu \
    --cc=kr@cybsft.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-rt-users@vger.kernel.org \
    --subject='Re: v2.6.20-rt1, yum/rpm' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).