Re: [PATCH 2/2] page-allocator: Maintain rolling count of pages to free from the PCP

From: Minchan Kim
Date: Fri Aug 28 2009 - 09:50:10 EST

On Fri, Aug 28, 2009 at 5:44 PM, Mel Gorman<mel@xxxxxxxxx> wrote:
> When round-robin freeing pages from the PCP lists, empty lists may be
> encountered. In the event one of the lists has more pages than another,
> there may be numerous checks for list_empty() which is undesirable. This
> patch maintains a count of pages to free which is incremented when empty
> lists are encountered. The intention is that more pages will then be freed
> from fuller lists than the empty ones reducing the number of empty list
> checks in the free path.
> Signed-off-by: Mel Gorman <mel@xxxxxxxxx>
Reviewed-by: Minchan Kim <>

I like this idea. :)
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