On Wed, 2007-10-31 at 14:52 +1100, Nick Piggin wrote:

On Wednesday 31 October 2007 03:04, Peter Zijlstra wrote:

quoted

Change ALLOC_NO_WATERMARK page allocation such that the reserves are system
wide - which they are per setup_per_zone_pages_min(), when we scrape the
barrel, do it properly.

IIRC it's actually not too uncommon to have allocations coming here via
page reclaim. It's not exactly clear that you want to break mempolicies
at this point.

Hmm, the way I see it is that mempolicies are mainly for user-space
allocations, reserve allocations are always kernel allocations. These
already break mempolicies - for example hardirq context allocations.

Also, as it stands, the reserve is spread out evenly over all
zones/nodes (excluding highmem), so by restricting ourselves to a
subset, we don't have access to the full reserve.