| Re: [proaudio] 2.6.21-rt9 - IRQ23 using CPU constantly / 2.6.18-rt7 didn't |
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- To: proaudio@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [proaudio] 2.6.21-rt9 - IRQ23 using CPU constantly / 2.6.18-rt7 didn't
- From: "Mark Knecht" <markknecht@xxxxxxxxx>
- Date: Sun, 10 Jun 2007 13:46:45 -0700
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On 6/10/07, Frieder Bürzele <evermind@xxxxxxxxxxxxx> wrote:
Mark Knecht wrote:
> On 6/9/07, Frieder Bürzele <evermind@xxxxxxxxxxxxx> wrote:
>> Mark Knecht wrote:
>> > Hi all,
>> >
>> > Since upgrading to the 2.6.21-rt series kernel I've seen that IRQ 23
>> > is constantly using a small amount of the CPU. This is true in
>> > 2.6.21-rt9 (what's the '.3'?) and 2.6.21-rc5-r12.
>> .3 is just because Ingo's realtime-patch also ships the stable patch
>> from
>> kernel.org
>> >
>> > Before I report this to the kernel mailing list I thought I'd ask here
>> > whether anyone else has seen anything like this? I haven't seen any
>> > discussions myself but I thought it didn't hurt to ask.
>> >
>> <snip>
>
> OK, cool. (I think!) ;-)
>
> Anyway, if no one has seen this or I don't have some response by
> tomorrow, Sunday, then I'll ship the info of to LKML. I hope one
> Sunday morning before I report it to have a chance to test the vanilla
> kernel to ensure the regression isn't in the main kernel instead of
> Ingo's patches.
>
> Thanks all,
> Mark
>
I saw this kind of 'problem' also on the 64studio-devel mailinglist
http://search.gmane.org/?query=IRQ+23&group=gmane.linux.distributions.64studio
Greetz Frieder
Thanks again. I reported it with a copy to Ingo and got a patch back
that fixes the issue. I don't know if this will result in a change to
rt-sources down the road. (I'm not that smart.) Anyway, it's in the
forcedeth.c driver should the question come up. Here's the patch I
applied:
http://people.redhat.com/mingo/realtime-preempt/testing/forcedeth-rt-tweak.patch
Cheers,
Mark