Re: [PATCH -mm 2/2] mm: do not reset mm->free_area_cache on everysingle munmap

[Rik van Riel]

On 02/23/2012 04:57 PM, Andi Kleen wrote:
> Rik van Riel<riel@xxxxxxxxxx>  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.

The copy'n'pasted functions are not quite the same, though.

All the ones that could be unified already have been, leaving
a few functions with actual differences around.

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