Re: [PATCH 2/5] page allocator: Do not allow interrupts to useALLOC_HARDER

[Mel Gorman]

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
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