Re: [PATCH 44 of 66] skip transhuge pages in ksm for now

[Mel Gorman]

On Wed, Nov 03, 2010 at 04:28:19PM +0100, Andrea Arcangeli wrote:
> From: Andrea Arcangeli <aarcange@xxxxxxxxxx>
> 
> Skip transhuge pages in ksm for now.
> 
> Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
> Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>

Acked-by: Mel Gorman <mel@xxxxxxxxx>

This is an idle concern that I haven't looked into but is there any conflict
between khugepaged scanning the KSM scanning?

Specifically, I *think* the impact of this patch is that KSM will not
accidentally split a huge page. Is that right? If so, it could do with
being included in the changelog.

On the other hand, can khugepaged be prevented from promoting a hugepage
because of KSM?

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