Re: [PATCH] mm/rmap.c: reuse mergeable anon_vma as parent when fork

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To: Wei Yang <richardw.yang@xxxxxxxxxxxxxxx>
Subject: Re: [PATCH] mm/rmap.c: reuse mergeable anon_vma as parent when fork
From: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Date: Fri, 4 Oct 2019 09:11:20 -0700
Cc: akpm@xxxxxxxxxxxxxxxxxxxx, kirill.shutemov@xxxxxxxxxxxxxxx, jglisse@xxxxxxxxxx, mike.kravetz@xxxxxxxxxx, riel@xxxxxxxxxxx, khlebnikov@xxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
In-reply-to: <20191004160632.30251-1-richardw.yang@linux.intel.com>
References: <20191004160632.30251-1-richardw.yang@linux.intel.com>
User-agent: Mutt/1.12.1 (2019-06-15)

On Sat, Oct 05, 2019 at 12:06:32AM +0800, Wei Yang wrote:
> After this change, kernel build test reduces 20% anon_vma allocation.

But does it have any effect on elapsed time or peak memory consumption?

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References:
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  - From: Wei Yang

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