On 03/02/2015 05:08 PM, Christoph Lameter wrote:

On Mon, 2 Mar 2015, Vlastimil Babka wrote:

quoted

quoted

You are thinking about an opportunistic allocation attempt in SLAB?

AFAICT SLAB allocations should trigger reclaim.

Well, let me quote your commit 952f3b51beb5:

This was about global reclaim. Local reclaim is good and that can be
done via zone_reclaim.

Right, so the patch is a functional change for zone_reclaim_mode == 1, 
where !__GFP_WAIT will prevent it.