linux-kernel - [PATCH -mm 0/2] make /proc/PID/*maps* namespace friendly

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Date:	Wed, 20 Aug 2014 18:49:22 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Alexander Viro <viro@...iv.linux.org.uk>,
	Cyrill Gorcunov <gorcunov@...nvz.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Greg Ungerer <gerg@...inux.org>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH -mm 0/2] make /proc/PID/*maps* namespace friendly

Hello,

Lets continue the boring proc/maps cleanups.

Eric, I do agree that the tgid vs pid logic looks strange, but I didn't
even try to change it. Let's at least fix the namespace problems first.
This is minor, but it is shame that /proc/pid/maps still shows the pid
from the global namespace. And this is preparation for the next change.

With this change the only user of proc_maps_private->task is
hold_task_mempolicy/release_task_mempolicy. I believe this code is buggy
and should die, but this needs the changes in mm/mempolicy.c.

After that we can kill priv->task. task_nommu.c can be updated right now,
but it would be better to change it along with task_mmu.c (we have a small
complication with -ESRCH).

Oleg.

 fs/proc/internal.h   |    2 +-
 fs/proc/task_mmu.c   |   29 +++++++++++++++++++++++------
 fs/proc/task_nommu.c |   25 ++++++++++++++++++++++---
 include/linux/mm.h   |    4 ++--
 mm/util.c            |   23 ++++++++---------------
 5 files changed, 56 insertions(+), 27 deletions(-)

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