linux-kernel - Re: [PATCH 10/10] Use down_read_critical() for /sys/<pid>/exe and /sys/<pid>/maps files

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Message-ID: <17704.1274780573@redhat.com>
Date:	Tue, 25 May 2010 10:42:53 +0100
From:	David Howells <dhowells@...hat.com>
To:	Michel Lespinasse <walken@...gle.com>
Cc:	dhowells@...hat.com,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mike Waychison <mikew@...gle.com>,
	Suleiman Souhlal <suleiman@...gle.com>,
	Ying Han <yinghan@...gle.com>, peterz@...radead.org
Subject: Re: [PATCH 10/10] Use down_read_critical() for /sys/<pid>/exe and /sys/<pid>/maps files

Michel Lespinasse <walken@...gle.com> wrote:

> - The cluster management software tracks ownership of sysv shm
> segments, potentially deleting them if they have been abandoned.
> /proc/<pid>/maps files are used as an input to these decisions.

ipcs manages to give you that information in its nattch column, I believe,
without touching /proc/pid/maps.

David
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