Re: [PATCH] set_pgdat_percpu_threshold() don't usefor_each_online_cpu

[Mel Gorman]

On Mon, Nov 15, 2010 at 08:04:23AM -0600, Christoph Lameter wrote:
> On Mon, 15 Nov 2010, Mel Gorman wrote:
> 
> > With recent per-cpu allocator changes, are we guaranteed that the per-cpu
> > structures exist and are valid?
> 
> We always guarantee that all per cpu areas for all possible cpus exist.
> That has always been the case. There was a discussion about changing
> that though. Could be difficult given the need for additional locking.
> 

In that case, I do not have any more concerns about the patch. It's
unfortunate that more per-cpu structures will have to be updated but I
doubt it'll be noticable.

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