Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757952Ab0LNLpt (ORCPT ); Tue, 14 Dec 2010 06:45:49 -0500 Received: from e28smtp04.in.ibm.com ([122.248.162.4]:41972 "EHLO e28smtp04.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754642Ab0LNLps (ORCPT ); Tue, 14 Dec 2010 06:45:48 -0500 Date: Tue, 14 Dec 2010 17:15:42 +0530 From: Balbir Singh To: Minchan Kim Cc: linux-mm@kvack.org, akpm@linux-foundation.org, npiggin@kernel.dk, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, kosaki.motohiro@jp.fujitsu.com, cl@linux.com, kamezawa.hiroyu@jp.fujitsu.com Subject: Re: [PATCH 2/3] Refactor zone_reclaim (v2) Message-ID: <20101214114542.GE14178@balbir.in.ibm.com> Reply-To: balbir@linux.vnet.ibm.com References: <20101210142745.29934.29186.stgit@localhost6.localdomain6> <20101210143018.29934.11893.stgit@localhost6.localdomain6> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2121 Lines: 64 * MinChan Kim [2010-12-14 19:01:26]: > Hi Balbir, > > On Fri, Dec 10, 2010 at 11:31 PM, Balbir Singh > wrote: > > Move reusable functionality outside of zone_reclaim. > > Make zone_reclaim_unmapped_pages modular > > > > Signed-off-by: Balbir Singh > > --- > > ?mm/vmscan.c | ? 35 +++++++++++++++++++++++------------ > > ?1 files changed, 23 insertions(+), 12 deletions(-) > > > > diff --git a/mm/vmscan.c b/mm/vmscan.c > > index e841cae..4e2ad05 100644 > > --- a/mm/vmscan.c > > +++ b/mm/vmscan.c > > @@ -2815,6 +2815,27 @@ static long zone_pagecache_reclaimable(struct zone *zone) > > ?} > > > > ?/* > > + * Helper function to reclaim unmapped pages, we might add something > > + * similar to this for slab cache as well. Currently this function > > + * is shared with __zone_reclaim() > > + */ > > +static inline void > > +zone_reclaim_unmapped_pages(struct zone *zone, struct scan_control *sc, > > + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? unsigned long nr_pages) > > +{ > > + ? ? ? int priority; > > + ? ? ? /* > > + ? ? ? ?* Free memory by calling shrink zone with increasing > > + ? ? ? ?* priorities until we have enough memory freed. > > + ? ? ? ?*/ > > + ? ? ? priority = ZONE_RECLAIM_PRIORITY; > > + ? ? ? do { > > + ? ? ? ? ? ? ? shrink_zone(priority, zone, sc); > > + ? ? ? ? ? ? ? priority--; > > + ? ? ? } while (priority >= 0 && sc->nr_reclaimed < nr_pages); > > +} > > As I said previous version, zone_reclaim_unmapped_pages doesn't have > any functions related to reclaim unmapped pages. The scan control point has the right arguments for implementing reclaim of unmapped pages. > The function name is rather strange. > It would be better to add scan_control setup in function inner to > reclaim only unmapped pages. > > -- > Kind regards, > Minchan Kim -- Three Cheers, Balbir -- 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/