On Tue, 2011-05-10 at 11:21 +0100, Mel Gorman wrote:

I really would like to hear if the fix makes a big difference or
if we need to consider forcing SLUB high-order allocations bailing
at the first sign of trouble (e.g. by masking out __GFP_WAIT in
allocate_slab). Even with the fix applied, kswapd might be waking up
less but processes will still be getting stalled in direct compaction
and direct reclaim so it would still be jittery.

"the fix" being this

https://lkml.org/lkml/2011/3/5/121

In addition to your GFP_KSWAPD one?

OK, will retry with that.

James