linux-kernel - Re: [PATCH v2] iommu: Add event tracing feature to iommu

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Date:	Tue, 30 Jul 2013 14:18:20 +0000
From:	Shuah Khan <shuah.kh@...sung.com>
To:	Joe Perches <joe@...ches.com>
Cc:	"joro@...tes.org" <joro@...tes.org>,
	"alex.williamson@...hat.com" <alex.williamson@...hat.com>,
	"Varun.Sethi@...escale.com" <Varun.Sethi@...escale.com>,
	"aik@...abs.ru" <aik@...abs.ru>,
	"rostedt@...dmis.org" <rostedt@...dmis.org>,
	"fweisbec@...il.com" <fweisbec@...il.com>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"tony@...mide.com" <tony@...mide.com>,
	"ohad@...ery.com" <ohad@...ery.com>,
	"andreas.herrmann@...xeda.com" <andreas.herrmann@...xeda.com>,
	"will.deacon@....com" <will.deacon@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
	"shuahkhan@...il.com" <shuahkhan@...il.com>,
	Shuah Khan <shuah.kh@...sung.com>
Subject: Re: [PATCH v2] iommu: Add event tracing feature to iommu

On 07/29/2013 07:30 PM, Joe Perches wrote:
> On Mon, 2013-07-29 at 19:22 -0600, Shuah Khan wrote:
>> Add tracing feature to iommu to report various iommu events. Classes
>> iommu_group, iommu_device, iommu_map_unmap, and iommu_amd_event are defined.
>
> Hi again Shuah
>
>> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> []
>> @@ -2159,6 +2160,15 @@ static int iommu_prepare_identity_map(struct pci_dev *pdev,
>>   	printk(KERN_INFO
>>   	       "IOMMU: Setting identity map for device %s [0x%Lx - 0x%Lx]\n",
>>   	       pci_name(pdev), start, end);
>> +
>> +	{
>> +		trace_amd_event("Event", 0x1, pdev->devfn, 0, start, 2);
>> +		trace_remove_device_from_group(0, &pdev->dev);
>> +		trace_attach_device_to_domain(&pdev->dev);
>> +		trace_detach_device_from_domain(&pdev->dev);
>> +		trace_map(start, end, 1024);
>> +		trace_unmap(start, end, 1024);
>> +	}
>
> Aren't these parentheses superfluous and
> so the indent too deep too?
>

Hi Joe,

That is the test code, I included by mistake. I had these changes 
sitting uncommitted in my tree for testing and I accidentally generated 
the patch with them. I am going to send a patch without this file.

I should remember to not rush things at the end of day and create noise. :(

-- Shuah

Shuah Khan, Linux Kernel Developer - Open Source Group Samsung Research 
America (Silicon Valley) shuah.kh@...sung.com | (970) 672-0658
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