On Fri, Oct 23, 2009 at 10:03:05PM -0400, Christoph Lameter wrote:

There are now rt dependencies in the page allocator that screw things up?

The rt logic was present before.

And an rt flag causes the page allocator to try harder meaning it adds
latency.

The harder term in the flag is a bit misleading. The effect of ALLOC_HARDER
is that the watermark is lower for the task. i.e. a rt task is less likely
to enter direct reclaim than normal tasks so it should have less latency.

?

-- 
Mel Gorman
Part-time Phd Student                          Linux Technology Center
University of Limerick                         IBM Dublin Software Lab