Re: [patch 2/2] mm: handle unaligned zones

[Nick Piggin <nickpiggin@yahoo.com.au>]

Nick Piggin wrote:
> Andrew Morton wrote:
> 
>> How about just throwing the pages away?  It sounds like a pretty rare
>> problem.
> 
> 
> Well that's what many architectures will end up doing, yes. But on
> small or embedded platforms, 4MB - 1 is a whole lot of memory to be
> throwing away.
> 
> Also, I'm not sure it is something we can be doing in generic code,
> because some architectures apparently have very strange zone setups
> (eg. zones from several pages interleaved within a single zone's
> ->spanned_pages). So it doesn't sound like a simple matter of trying
> to override the zones' intervals.

Oh I see, yeah I guess you could throw away the pages forming the
present fraction of the MAX_ORDER buddy...

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