Re: is anyone seriously using execute-in-place (in embedded systems)?

[Erik Mouw <mouw@xxxxxxxxxxxx>]

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On Wed, May 02, 2007 at 09:36:09AM -0400, Robert P. J. Day wrote:
>   is anyone using XIP for their linux kernel?  i know the argument
> about saving space by running the kernel straight out of ROM, but that
> also costs more in terms of ROM memory since the kernel has to be
> stored uncompressed, no?

Correct. Given the fact that flash memory is more expensive than RAM,
I've always failed to see why XIP would be an advantage.

>   so, despite the advantages of XIP, is anyone actually using it on a
> regular or production basis?  thanks.

So far I haven't actually heard a convincing advantage of XIP.

I guess some appliances use XIP, after all it was a large network
vendor that moved a large stack of green paper in the direction of an
embedded Linux vendor to get XIP supported. After moving all that green
paper it would be a shame not to use the result ;)


Erik

- -- 
They're all fools. Don't worry. Darwin may be slow, but he'll
eventually get them. -- Matthew Lammers in alt.sysadmin.recovery
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