Re: [PATCH] x86: put initial_pg_tables into .bss -v4

[Jeremy Fitzhardinge]

H. Peter Anvin wrote:
> Yinghai Lu wrote:
>   
> > it just estimates initial_pg_tables size, and make _end a little bigger (1M), so boot loader could have idea of correct size of vmlinux aka the uncompressed size of in kernel.
> >
> > I assume brk patches could estimate the extra size that it needs too.
> >
> >     
>
> Yes, and I have made that point several times in this thread already.
>
> I really like the brk interface because it's a clean, general-purpose 
> allocator.
>
> We can create a brk segment in vmlinux (and even bound the brk to catch 
> overflows, instead of randomly failing) to advertise the presence of the 
> brk.
>   

I have a patchset to do exactly this in testing; I'll try to mail it out 
later this evening.  Its very similar (including reserving 1MB after the 
end of the bss variables, in the bss section).

   J
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