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

Greg Ungerer
2008-08-21T23:49:44Z

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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Greg Ungerer -- Chief Software Dude EMAIL: gerg@snapgear.com
Secure Computing Corporation PHONE: +61 7 3435 2888
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