linux-kernel - Re: [PATCH 2/3] Add MAP_LARGEPAGE for mmaping pseudo-anonymous huge page regions

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Message-ID: <cfd18e0f0908112207y186d0aav6e0e55ce070778cf@mail.gmail.com>
Date:	Wed, 12 Aug 2009 07:07:48 +0200
From:	Michael Kerrisk <mtk.manpages@...glemail.com>
To:	Eric B Munson <ebmunson@...ibm.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-man@...r.kernel.org
Subject: Re: [PATCH 2/3] Add MAP_LARGEPAGE for mmaping pseudo-anonymous huge 
	page regions

Eric,

On Wed, Aug 12, 2009 at 12:13 AM, Eric B Munson<ebmunson@...ibm.com> wrote:
> This patch adds a flag for mmap that will be used to request a huge
> page region that will look like anonymous memory to user space.  This
> is accomplished by using a file on the internal vfsmount.  MAP_LARGEPAGE
> is a modifier of MAP_ANONYMOUS and so must be specified with it.  The
> region will behave the same as a MAP_ANONYMOUS region using small pages.

Does this flag provide functionality analogous to shmget(SHM_HUGETLB)?
If so, would iot not make sense to name it similarly (i.e.,
MAP_HUGETLB)?

Cheers,

Michael

-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Watch my Linux system programming book progress to publication!
http://blog.man7.org/
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