Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm3-V0.7.25-1
From: Shane Shrybman <shrybman@aei.ca>
To: "K.R. Foley" <kr@cybsft.com>
Cc: Ingo Molnar <mingo@elte.hu>, linux-kernel <linux-kernel@vger.kernel.org>,
       Lee Revell <rlrevell@joe-job.com>, Rui Nuno Capela <rncbc@rncbc.org>,
       Mark_H_Johnson@Raytheon.com, Bill Huey <bhuey@lnxw.com>,
       Adam Heath <doogie@debian.org>, Florian Schmidt <mista.tapas@gmx.net>,
       Thomas Gleixner <tglx@linutronix.de>,
       Michal Schmidt <xschmi00@stud.feec.vutbr.cz>,
       Fernando Pablo Lopez-Lezcano <nando@ccrma.Stanford.EDU>,
       Karsten Wiese <annabellesgarden@yahoo.de>,
       Gunther Persoons <gunther_persoons@spymac.com>, emann@mrv.com,
       Amit Shah <amit.shah@codito.com>
In-Reply-To: <4194F294.4000908@cybsft.com>
References: <20041022155048.GA16240@elte.hu> <20041022175633.GA1864@elte.hu>
	 <20041025104023.GA1960@elte.hu> <20041027001542.GA29295@elte.hu>
	 <20041103105840.GA3992@elte.hu> <20041106155720.GA14950@elte.hu>
	 <20041108091619.GA9897@elte.hu> <20041108165718.GA7741@elte.hu>
	 <20041109160544.GA28242@elte.hu> <20041111144414.GA8881@elte.hu>
	 <20041111215122.GA5885@elte.hu> <1100269881.10971.6.camel@mars>
	 <4194F294.4000908@cybsft.com>
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Date: Fri, 12 Nov 2004 12:50:52 -0500
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On Fri, 2004-11-12 at 12:27, K.R. Foley wrote:
> Shane Shrybman wrote:
> > On Thu, 2004-11-11 at 16:51, Ingo Molnar wrote:
> > 
> >>i have released the -V0.7.25-1 Real-Time Preemption patch, which can be
> >>downloaded from the usual place:
> >>
> >>    http://redhat.com/~mingo/realtime-preempt/
> >>
> >>this is a fixes-only release that resolves a couple of bugs that slipped
> >>into -V0.7.25-0:
> >>
> >> - lockup/deadlock fix: make debug_direct_keyboard default to 0. It is
> >>   only a debug helper to be used for development, it was never intended
> >>   to be enabled. This fix should resolve the bugs reported by Gunther
> >>   Persoons and Mark H. Johnson.
> > 
> > 
> > Ahh, that probably explains the problems I had with it!
> > 
> > V0.7.25-1 has been stable here with the ivtv driver for 11 hrs. No sign
> > of the ide dma time out issue either. Out of curiosity, do we know what
> > solved that problem?
> > 
> > Regards,
> > 
> > Shane
> > 
> 
> What sort of errors did you get about the ide dma timeouts?
> 

Typical example of the error message:

kernel: hde: dma_timer_expiry: dma status == 0x24
kernel: ALSA sound/core/pcm_native.c:1424: playback drain error (DMA or IRQ trouble?)
kernel: PDC202XX: Primary channel reset.
kernel: hde: DMA interrupt recovery
kernel: hde: lost interrupt

This was on a Promise TX2 133 ide card with one IDE disk. The problem
would show itself if using the RT patches and APIC. But the problem seems
to have been resolved now.

> kr
> 

Regards,

Shane

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