Re: [PATCH 00/10] AXFS: Advanced XIP filesystem

[Greg Ungerer <gerg@snapgear.com>]

Jamie Lokier wrote:
> Jared Hulbert wrote:
>> The biggest improvement is in the way AXFS allows for each page to be XIP or
>> not.  First, a user collects information about which pages are accessed on a
>> compressed image for each mmap()ed region from /proc/axfs/volume0.  That
>> 'profile' is used as an input to the image builder.  The resulting image has
>> only the relevant pages uncompressed and XIP.  The result is smaller memory
>> sizes and faster launches.
> 
> Sounds great, really nice idea.
> 
> How does it fare with no MMU?  Can the profiler and image builder lay
> out the XIP pages in such a way that no-MMU mmaps can map those regions?

The key for XIP on noMMU would be the ability to store a
file as one complete contiguous chunk. Can AXFS do this?

Regards
Greg



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