Re: [RFC PATCH 0/3] Aggressively allocate the pages on cma reserved memory

[Joonsoo Kim]

On Thu, May 15, 2014 at 10:47:18AM +0100, Mel Gorman wrote:
> On Thu, May 15, 2014 at 11:10:55AM +0900, Joonsoo Kim wrote:
> > > That doesn't always prefer CMA region. It would be nice to
> > > understand why grouping in pageblock_nr_pages is beneficial. Also in
> > > your patch you decrement nr_try_cma for every 'order' allocation. Why ?
> > 
> > pageblock_nr_pages is just magic value with no rationale. :)
> 
> I'm not following this discussions closely but there is rational to that
> value -- it's the size of a huge page for that architecture.  At the time
> the fragmentation avoidance was implemented this was the largest allocation
> size of interest.

Hello,

Indeed. There is a such good rationale.
Really thanks for informing it.

Thanks.
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