linux-kernel - Re: [PATCH 5/5] mm: search from free_area

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Date:	Wed, 1 Feb 2012 14:44:01 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
Cc:	William Irwin <wli@...omorphy.com>, linux-mm@...ck.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 5/5] mm: search from free_area_cache for the bigger size

On Fri, 13 Jan 2012 19:47:31 +0800
Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com> 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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