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List:       alsa-devel
Subject:    [alsa-devel] [RFC] ALSA: add new alsa control byte extended
From:       broonie () kernel ! org (Mark Brown)
Date:       2013-11-29 14:17:55
Message-ID: 20131129141755.GA27568 () sirena ! org ! uk
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On Fri, Nov 29, 2013 at 01:11:53PM +0000, Charles Keepax wrote:

> We haven't done a lot of investigation into the latency of this
> at this time but it is certainly something that is coming up in
> discussions and I would expect we will be starting to worry more
> about it in the near future. I will endeavour to share what
> results I can as we get into this more.

Given that you're working with devices that aren't memory mapped I'd
expect we'd have to be doing something appauling for it to register -
the costs of doing I/O really ought to dwarf anything else for them.
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