linux-kernel - Re: [PATCH v2] [media] vb2: core: Lower the log level of debug outputs

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Date:   Wed, 7 Jun 2017 11:01:06 +0200
From:   Hans Verkuil <hverkuil@...all.nl>
To:     Joe Perches <joe@...ches.com>, Hirokazu Honda <hiroh@...omium.org>
Cc:     Pawel Osciak <pawel@...iak.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] [media] vb2: core: Lower the log level of debug
 outputs

On 31/05/17 06:06, Joe Perches wrote:
> On Wed, 2017-05-31 at 12:28 +0900, Hirokazu Honda wrote:
>> If I understand a bitmap correctly, it is necessary to change the log level
>> for each message.
>> I didn't mean a bitmap will take a long CPU time.
>> I mean the work to change so takes a long time.
> 
> No, none of the messages or levels need change,
> only the >= test changes to & so that for instance,
> level 1 and level 3 messages could be emitted
> without also emitting level 2 messages.
> 
> The patch suggested is all that would be required.
> 

I prefer the solution that Joe proposed as well.

It's more useful, esp. with a complex beast like vb2.

Regards,

	Hans