Maximum bootable kernel size in current ARM linux

[Marek Vasut]

Dne Po 13. září 2010 09:40:56 Bruce M. Penrod napsal(a):
> This seems like a pretty straightforward question, but extensive web
> searching hasn't shown a really clear, up-to-date answer.  The most
> recent info is circa 2004 and states that 4MB is the largest
> uncompressed ARM kernel that may be loaded.  Not being an ARM assembly
> guru (head.S baffles me), I'd like to know if that is still true in
> 2010, and if it is, why?
> 
> I'm having one hell of a time compiling a monolithic kernel and keeping
> it under 4M without leaving out some core networking features I need.
>  From my searching, it looks like x86 has either removed the limit or
> raised it to a much higher number.  It's not clear to me why a 32 bit
> processor would not be able to boot a kernel larger than 4 MB.

Hey, CCed Russell.

Btw. this shouldn't be true anymore. On the other hand, why do you need such a 
huge kernel?

It's not even possible to create kernel that big if you don't have some kind of 
initramfs in, right? Besides, you can use some kind of a compression, like LZMA 
or something to keep the size down.

Cheers
> 
> Bruce
> 
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