linux-kernel - Re: [PATCH] irqdomain: provide useful debugging information for irq domain

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Date:   Wed, 17 Jan 2018 10:43:19 +0000
From:   Marc Zyngier <marc.zyngier@....com>
To:     "Yang, Shunyong" <shunyong.yang@...-semitech.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Zheng, Joey" <yu.zheng@...-semitech.com>
Subject: Re: [PATCH] irqdomain: provide useful debugging information for irq
 domain

On 17/01/18 10:20, Yang, Shunyong wrote:
> Hi, Thomas and Marc,
> 
> On Wed, 2018-01-17 at 11:01 +0100, Thomas Gleixner wrote:
>> On Wed, 17 Jan 2018, Yang, Shunyong wrote:
>>>
>>> On Wed, 2018-01-17 at 10:33 +0100, Thomas Gleixner wrote:
>>>>
>>>> And how is that different from:
>>>>
>>>>>
>>>>>
>>>>> The nodes under debugfs irq/irqs describes information of every
>>>>> single
>>>>> irq.
>>>> Not at all. It contains the complete hierarchical information of
>>>> each
>>>> virq.
>>>>
>>> I think irq_domain_mapping can provide some high-level information
>>> in a
>>> summary style.
>>> For example, we can check all the IRQs connect to a specific irq
>>> chip
>>> or irq domain.
>> You can retrieve the same information from the irq/irqs files. All it
>> takes
>> is a shell script.
>>
>> Aside of that with hierarchical irq domains the old debug output is
>> just
>> useless.
>>
> Umm...Agree. Need I post a patch to remove it?

I'm on it.

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...