Re: 2.5.68-mm4

[Andrew Morton <akpm@digeo.com>]

Anton Blanchard <anton@samba.org> wrote:
>
> 
> Hi,
> 
> > . Included the `kexec' patch - load Linux from Linux.  Various people want
> >   this for various reasons.  I like the idea of going from a login prompt to
> >   "Calibrating delay loop" in 0.5 seconds.
> 
> One thing that bothers me about kexec is how we grab low pages in
> kimage_alloc_page(). On a partitioned ppc64 box I will need to grab
> memory in the low 256MB and the machine might have 500GB of memory
> free. Thats going to take some time :)
> 
> Id hate to introduce a separate zone just for this sort of stuff (we
> currently throw all memory in the DMA zone). Could we add a hint to
> the page allocator where it makes a best effort to grab memory below
> a threshold?
> 

Eric may be able to suggest something.


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