Re: [PATCH 5/5] mm: search from free_area_cache for the bigger size

[Andrew Morton]

On Fri, 13 Jan 2012 19:47:31 +0800
Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxxxxxx> wrote:

> If the required size is bigger than cached_hole_size, we would better search
> from free_area_cache, it is more easier to get free region, specifically for
> the 64 bit process whose address space is large enough
> 
> Do it just as hugetlb_get_unmapped_area_topdown() in arch/x86/mm/hugetlbpage.c

Can this cause additional fragmentation of the virtual address region? 
If so, what might be the implications of this?

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