From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932253Ab0EYJn0 (ORCPT ); Tue, 25 May 2010 05:43:26 -0400 Received: from mx1.redhat.com ([209.132.183.28]:50861 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754245Ab0EYJnZ (ORCPT ); Tue, 25 May 2010 05:43:25 -0400 Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: References: <1274135154-24082-1-git-send-email-walken@google.com> <1274135154-24082-11-git-send-email-walken@google.com> <31783.1274282492@redhat.com> To: Michel Lespinasse Cc: dhowells@redhat.com, Linus Torvalds , Ingo Molnar , Thomas Gleixner , LKML , Andrew Morton , Mike Waychison , Suleiman Souhlal , Ying Han , peterz@infradead.org Subject: Re: [PATCH 10/10] Use down_read_critical() for /sys//exe and /sys//maps files Date: Tue, 25 May 2010 10:42:53 +0100 Message-ID: <17704.1274780573@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Michel Lespinasse wrote: > - The cluster management software tracks ownership of sysv shm > segments, potentially deleting them if they have been abandoned. > /proc//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