Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754141Ab3DWBxx (ORCPT ); Mon, 22 Apr 2013 21:53:53 -0400 Received: from LGEMRELSE1Q.lge.com ([156.147.1.111]:53218 "EHLO LGEMRELSE1Q.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753191Ab3DWBxw (ORCPT ); Mon, 22 Apr 2013 21:53:52 -0400 X-AuditID: 9c93016f-b7c87ae000002520-91-5175e9ae52e2 Date: Tue, 23 Apr 2013 10:53:49 +0900 From: Minchan Kim To: Dave Hansen Cc: Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Michael Kerrisk , Rik van Riel , Rob Landley , Namhyung Kim Subject: Re: [PATCH 6/6] add documentation on proc.txt Message-ID: <20130423015349.GC2603@blaptop> References: <1366620306-30940-1-git-send-email-minchan@kernel.org> <1366620306-30940-6-git-send-email-minchan@kernel.org> <51756286.4020704@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <51756286.4020704@intel.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1403 Lines: 47 Hello Dave, On Mon, Apr 22, 2013 at 09:17:10AM -0700, Dave Hansen wrote: > On 04/22/2013 01:45 AM, Minchan Kim wrote: > > +The /proc/PID/reclaim is used to reclaim pages in this process. > > +To reclaim file-backed pages, > > + > echo 1 > /proc/PID/reclaim > > + > > +To reclaim anonymous pages, > > + > echo 2 > /proc/PID/reclaim > > + > > +To reclaim both pages, > > + > echo 3 > /proc/PID/reclaim > > This seems to be in the same spirit as /proc/sys/vm/drop_caches. That's > not a sin in and of itself. But, why use numbers here? > > Any chance I could talk you in to using some strings, say like: > > echo 'anonymous' > /proc/PID/reclaim > echo 'anonymous|file' > /proc/PID/reclaim I discussed with Namhyung about interface. His suggestion looks sane to me. echo 'file' > /proc/PID/reclaim echo 'anon' > /proc/PID/reclaim echo 'both' > /proc/PID/reclaim For range reclaim, echo $((1<<20)) 8192 > /proc/PID/reclaim. IOW, we don't need any type for range reclaim because only thing user takes care is address range which has mapped page regardless of that it's anon or file. Does it make sense to you? -- Kind regards, Minchan Kim -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/