Re: [00/41] Large Blocksize Support V7 (adds memmap support)

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Christoph Lameter wrote:
True. That is why we want to limit the number of unmovable allocations and that is why ZONE_MOVABLE exists to limit those. However, unmovable allocations are already rare today. The overwhelming majority of allocations are movable and reclaimable. You can see that f.e. by looking at /proc/meminfo and see how high SUnreclaim: is (does not catch everything but its a good indicator).

Just to inject another factor into the discussion, please remember that Linux also runs on nommu systems, where things like user space allocations are neither movable nor reclaimable.


Bernd

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