Re: Crash while mapping memory in pagetable_init() (Was: Re: .config)

[Jeremy Fitzhardinge]

Zachary Amsden wrote:
> Note you can always run out of space; to ensure safety, the init code
> needs to not use a fixed mapping size, it needs to map
> end_kernel_address + pae ? 1808k : 896k, assuming 128M vmalloc hole. 
> This could cause problems like running into initrd, however, so might
> require loader changes, or perhaps relocating the initrd.  Is the
> solution to just cap the kernel size at some fixed maximum?  6.2M
> appears to be the safe limit for all configurations.
>
> I'm pulling this back onto lkml; seems this is a serious bug which
> needs attention.  I've also cc'd some parties that might have relevant
> knowledge.  Why do I seem to recall head.S mapping 128M of mappings at
> one point in time? 

I just posted a patch.  Oops, forgot to Cc: Eric.

    J
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