[LAD] ALSA latency and MMAP

Jussi Laako jussi at sonarnerd.net
Mon Sep 7 21:02:55 UTC 2009

Paul Davis wrote:
> something must have changed. "back in the day", you could not possible
> use the mmap API to deliver > 1 period at a time. has that changed?

at least I understand that readi/writei/readn/writen are just helper
functions around mmap_begin/mmap_commit.

Essentially it should be possible to do read/modify/write as well as the
memcpy actions on mmap buffer, because former can be implemented in user
space using latter...

	- Jussi

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