linux-kernel - Re: [PATCH 1/3] hugetlbfs: Allow the creation of files suitable for MAP

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <alpine.DEB.2.00.0908261234020.4511@chino.kir.corp.google.com>
Date:	Wed, 26 Aug 2009 12:34:15 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Eric B Munson <ebmunson@...ibm.com>
cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	akpm@...ux-foundation.org, linux-man@...r.kernel.org,
	mtk.manpages@...il.com, randy.dunlap@...cle.com
Subject: Re: [PATCH 1/3] hugetlbfs: Allow the creation of files suitable for
 MAP_PRIVATE on the vfs internal mount

On Tue, 25 Aug 2009, Eric B Munson wrote:

> There are two means of creating mappings backed by huge pages:
> 
>         1. mmap() a file created on hugetlbfs
>         2. Use shm which creates a file on an internal mount which essentially
>            maps it MAP_SHARED
> 
> The internal mount is only used for shared mappings but there is very
> little that stops it being used for private mappings. This patch extends
> hugetlbfs_file_setup() to deal with the creation of files that will be
> mapped MAP_PRIVATE on the internal hugetlbfs mount. This extended API is
> used in a subsequent patch to implement the MAP_HUGETLB mmap() flag.
> 
> Signed-off-by: Eric Munson <ebmunson@...ibm.com>

Acked-by: David Rientjes <rientjes@...gle.com>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/