RE: [PATCH 0/5] cramfs refresh for embedded usage

Nicolas Pitre <[email protected]> Wed, 16 Aug 2017 21:17:45 -0400 (EDT)

Newsgroups	org.kernel.vger.linux-embedded,org.kernel.vger.linux-fsdevel,org.kernel.vger.linux-kernel
Message-ID	<[email protected]>

On Wed, 16 Aug 2017, Chris Brandt wrote:

> I made an example once were all the graphics were RAW and uncompressed 
> and marked as XIP in AXFS. The result was a large saving of RAM because 
> as the graphics framework (DirectFB) would copy directly from Flash 
> whenever it needed to do a background erase or image re-draw (button press 
> animations).
> 
> Same went for playing MP3 files. The MP3 files were XIP in flash, so 
> mpg123 pulled from flash directly.

I wouldn't have expected mpg123 to mmap() its input files though.
If you use read() and not mmap() then you don't get the full benefit.


Nicolas