linux-kernel - Re: [RFC][PATCH] mm: madvise: MADV

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Message-ID: <51D25A71.3060007@sr71.net>
Date:	Mon, 01 Jul 2013 21:43:29 -0700
From:	Dave Hansen <dave@...1.net>
To:	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH] mm: madvise: MADV_POPULATE for quick pre-faulting

On 07/01/2013 07:37 PM, Zheng Liu wrote:
> FWIW, it would be great if we can let MAP_POPULATE flag support shared
> mappings because in our product system there has a lot of applications
> that uses mmap(2) and then pre-faults this mapping.  Currently these
> applications need to pre-fault the mapping manually.

Are you sure it doesn't?  From a cursory look at the code, it looked to
me like it would populate anonymous and file-backed, but I didn't
double-check experimentally.
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