Re: [linux-pm] [PATCH] hibernation should work ok with memory hotplug

Dave Hansen
2008-11-05T16:23:43Z

On Wed, 2008-11-05 at 20:10 +1100, Nigel Cunningham wrote:
> In your example above, zone_start_pfn will be 1, won't it? If that's the
> case, I shouldn't need to subtract ARCH_PFN_OFFSET to get the right
> index within the zone and avoid the same wastage that ARCH_PFN_OFFSET
> avoids with mem_map.

Yeah, I don't think the first zone will ever start before
ARCH_PFN_OFFSET.

If the code just deals with starting at any random zone_start_pfn and
going to any other random zone_end_pfn without any waste, then it should
be fine in the presence of ARCH_PFN_OFFSET. The only trouble is if it
assumes memory to start at 0x0.

-- Dave