[PATCH/RFCv4 0/6] The Contiguous Memory Allocator framework

Peter Zijlstra
2010-08-26T10:06:00Z

On Thu, 2010-08-26 at 18:29 +0900, Minchan Kim wrote:
> As I said following mail, I said about free space problem.
> Of course, compaction could move anon pages into somewhere.
> What's is somewhere? At last, it's same zone.
> It can prevent fragment problem but not size of free space.
> So I mean it would be better to move it into another zone(ex, HIGHMEM)
> rather than OOM kill.

Real machines don't have highmem, highmem sucks!! /me runs

Does cross zone movement really matter, I though these crappy devices
were mostly used on crappy hardware with very limited memory, so pretty
much everything would be in zone_normal.. no?

But sure, if there's really a need we can look at maybe doing cross zone
movement.