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Date:	Thu, 30 Jul 2015 12:08:49 +0800
From:	Jiang Liu <jiang.liu@...ux.intel.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	Matt Fleming <matt@...eblueprint.co.uk>
Cc:	linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
	Ingo Molnar <mingo@...nel.org>,
	Wolfram Sang <wsa@...-dreams.de>, linux-i2c@...r.kernel.org
Subject: Re: Regression in v4.2-rc1 caused by hierarchical irqdomain changes

On 2015/7/30 5:03, Thomas Gleixner wrote:
> On Mon, 27 Jul 2015, Matt Fleming wrote:
>> [BAD]
>>   3:          1          0          0          0  IR-IO-APIC   3-edge    
>>   6:          0          0          0          0  IR-IO-APIC   6-edge      dw_dmac
>>   7:         15          1          0          0  IR-IO-APIC   7-edge      INT3432:00, INT3433:00
> 
> [GOOD]
>>   3:         16         17         49         20  IR-IO-APIC-fasteoi   AudioDSP, dw_dmac
>>   6:          0          0          0          0  IR-IO-APIC-fasteoi   dw_dmac
>>   7:       2662       3072      12307       5419  IR-IO-APIC-fasteoi   INT3432:00, INT3433:00
> 
> So the old code uses fasteoi while the new one uses edge.
> 
> Jiang????
Sorry for the slow response.
We have reproduced this regression on Surface Pro 3, but are still
trying to figure out the root cause.
Thanks!
Gerry
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