Re: [RFC PATCH 0/2] Removal of lumpy reclaim

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On 04/06/2012 04:31 PM, Hugh Dickins wrote:
On Fri, 6 Apr 2012, Andrew Morton wrote:
On Wed, 28 Mar 2012 17:06:21 +0100
Mel Gorman<mgorman@xxxxxxx>  wrote:

(cc'ing active people in the thread "[patch 68/92] mm: forbid lumpy-reclaim
in shrink_active_list()")

In the interest of keeping my fingers from the flames at LSF/MM, I'm
releasing an RFC for lumpy reclaim removal.

I grabbed them, thanks.

I do have a concern with this: I was expecting lumpy reclaim to be
replaced by compaction, and indeed it is when CONFIG_COMPACTION=y.
But when CONFIG_COMPACTION is not set, we're back to 2.6.22 in
relying upon blind chance to provide order>0 pages.

Is this an issue for any architecture?

I could see NOMMU being unable to use compaction, but
chances are lumpy reclaim would be sufficient for that
configuration, anyway...

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