linux-kernel - Re: [PATCH -rt] use SA_NODELAY for XScale PMU interrupts

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Message-ID: <4501F348.7000208@mvista.com>
Date:	Fri, 08 Sep 2006 15:48:40 -0700
From:	Kevin Hilman <khilman@...sta.com>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH -rt] use SA_NODELAY for XScale PMU interrupts

Arjan van de Ven wrote:
> On Fri, 2006-09-08 at 12:22 -0700, Kevin Hilman wrote:
>> In the XScale oprofile support, the performance monitoring unit (PMU)
>> triggers interrupts and the ISR reads out the performance data.  These
>> ISRs are currently set to SA_INTERRUPT.  In order to get accurate
>> performance and profiling data under PREEMPT_RT, these should use
>> SA_NODELAY.  The functions called by this ISR are limited to
>> drivers/oprofile functions.
>>
>> Patch against 2.6.18-rt8
> 
> hmm I thought the SA_ flags were deprecated ???
> 

Sorry, although I said 2.6.18-rt8, the patch is against 2.6.17-rt8,
where the SA_ flags are still used.

Kevin


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