linux-kernel - Re: [PATCH] shm: Fix the filename of hugetlb sysv shared memory

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Message-Id: <20070611111111.2345470d.akpm@linux-foundation.org>
Date:	Mon, 11 Jun 2007 11:11:11 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	ebiederm@...ssion.com (Eric W. Biederman)
Cc:	"Serge E. Hallyn" <serge@...lyn.com>,
	Albert Cahalan <acahalan@...il.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	torvalds@...ux-foundation.org,
	Badari Pulavarty <pbadari@...ibm.com>
Subject: Re: [PATCH] shm: Fix the filename of hugetlb sysv shared memory

On Fri, 08 Jun 2007 17:43:34 -0600
ebiederm@...ssion.com (Eric W. Biederman) wrote:

> Some user space tools need to identify SYSV shared memory when
> examining /proc/<pid>/maps.  To do so they look for a block device
> with major zero, a dentry named SYSV<sysv key>, and having the minor of
> the internal sysv shared memory kernel mount.
> 
> To help these tools and to make it easier for people just browsing
> /proc/<pid>/maps this patch modifies hugetlb sysv shared memory to
> use the SYSV<key> dentry naming convention.
> 
> User space tools will still have to be aware that hugetlb sysv
> shared memory lives on a different internal kernel mount and so
> has a different block device minor number from the rest of sysv
> shared memory.

So..  I am sitting here believing that this patch and Badari's
restore-shmid-as-inode-to-fix-proc-pid-maps-abi-breakage.patch are both
needed in 2.6.22 and that they will fix all these issues up.

If that is untrue, someone please let us know..
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