linux-kernel - Re: [PATCH 1/1] proc: add /proc/pid/shmaps

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Date:	Wed, 8 Aug 2012 14:10:24 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Qiaowei Ren <qiaowei.ren@...el.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Oleg Nesterov <oleg@...hat.com>,
	Cyrill Gorcunov <gorcunov@...nvz.org>,
	Vasiliy Kulikov <segoon@...nwall.com>,
	Hugh Dickins <hughd@...gle.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] proc: add /proc/pid/shmaps

On Wed, 8 Aug 2012, Qiaowei Ren wrote:

> Add a shmaps entry to /proc/pid: show information about shared memory in an address space.
> 
> People that use shared memory and want to perform an analyzing about it. For example, judge whether any memory address is shared. This file just contains 'share' part of /proc/pid/maps now. There are too many contents in maps, and so we have to do a lot of analysis to obtain relative information every time.
> 
> Signed-off-by: Qiaowei Ren <qiaowei.ren@...el.com>

Nack as unnecessary; /proc/pid/maps already explicitly emits 's' for 
VM_MAYSHARE and 'p' otherwise so this information is already available to 
userspace.
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