linux-kernel - Re: [PATCH 2/2] mmap2: clarify MAP

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Message-ID: <20150513144715.GE1227@akamai.com>
Date:	Wed, 13 May 2015 10:47:15 -0400
From:	Eric B Munson <emunson@...mai.com>
To:	Michal Hocko <miso@...p22.suse.cz>
Cc:	Michael Kerrisk <mtk.manpages@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux API <linux-api@...r.kernel.org>, linux-mm@...ck.org,
	Michal Hocko <mhocko@...e.cz>
Subject: Re: [PATCH 2/2] mmap2: clarify MAP_POPULATE

On Wed, 13 May 2015, Michal Hocko wrote:

> From: Michal Hocko <mhocko@...e.cz>
> 
> David Rientjes has noticed that MAP_POPULATE wording might promise much
> more than the kernel actually provides and intend to provide. The
> primary usage of the flag is to pre-fault the range. There is no
> guarantee that no major faults will happen later on. The pages might
> have been reclaimed by the time the process tries to access them.
> 
> Signed-off-by: Michal Hocko <mhocko@...e.cz>

Reviewed-by: Eric B Munson <emunson@...mai.com>

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