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Date:	Thu, 23 Feb 2012 13:57:42 -0800
From:	Andi Kleen <>
To:	Rik van Riel <>
Cc:,,, Mel Gorman <>,
	Johannes Weiner <>,
	KOSAKI Motohiro <>,
	Andrea Arcangeli <>,
Subject: Re: [PATCH -mm 2/2] mm: do not reset mm->free_area_cache on every single munmap

Rik van Riel <> writes:

> Some programs have a large number of VMAs, and make frequent calls
> to mmap and munmap. Having munmap constantly cause the search
> pointer for get_unmapped_area to get reset can cause a significant
> slowdown for such programs. 

This would be a much nicer patch if you split it into one that merges
all the copy'n'paste code and another one that actually implements
the new algorithm.


-- -- Speaking for myself only
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