From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with ESMTP id 406656B004A for ; Mon, 13 Jun 2011 06:31:07 -0400 (EDT) Date: Mon, 13 Jun 2011 12:30:32 +0200 From: Johannes Weiner Subject: Re: [patch 7/8] vmscan: memcg-aware unevictable page rescue scanner Message-ID: <20110613103032.GA12143@cmpxchg.org> References: <1306909519-7286-1-git-send-email-hannes@cmpxchg.org> <1306909519-7286-8-git-send-email-hannes@cmpxchg.org> <20110613094203.GC10563@tiehlicka.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110613094203.GC10563@tiehlicka.suse.cz> Sender: owner-linux-mm@kvack.org List-ID: To: Michal Hocko Cc: KAMEZAWA Hiroyuki , Daisuke Nishimura , Balbir Singh , Ying Han , Andrew Morton , Rik van Riel , Minchan Kim , KOSAKI Motohiro , Mel Gorman , Greg Thelen , Michel Lespinasse , linux-mm@kvack.org, linux-kernel@vger.kernel.org On Mon, Jun 13, 2011 at 11:42:03AM +0200, Michal Hocko wrote: > On Wed 01-06-11 08:25:18, Johannes Weiner wrote: > > Once the per-memcg lru lists are exclusive, the unevictable page > > rescue scanner can no longer work on the global zone lru lists. > > > > This converts it to go through all memcgs and scan their respective > > unevictable lists instead. > > > > Signed-off-by: Johannes Weiner > > Just a minor naming thing. > > Other than that looks good to me. > Reviewed-by: Michal Hocko > > > --- a/include/linux/memcontrol.h > > +++ b/include/linux/memcontrol.h > [...] > > +struct page *mem_cgroup_lru_to_page(struct zone *zone, struct mem_cgroup *mem, > > + enum lru_list lru) > > +{ > > + struct mem_cgroup_per_zone *mz; > > + struct page_cgroup *pc; > > + > > + mz = mem_cgroup_zoneinfo(mem, zone_to_nid(zone), zone_idx(zone)); > > + pc = list_entry(mz->lists[lru].prev, struct page_cgroup, lru); > > + return lookup_cgroup_page(pc); > > +} > > + > [...] > > --- a/mm/vmscan.c > > +++ b/mm/vmscan.c > > @@ -3233,6 +3233,14 @@ void scan_mapping_unevictable_pages(struct address_space *mapping) > > > > } > > > > +static struct page *lru_tailpage(struct zone *zone, struct mem_cgroup *mem, > > + enum lru_list lru) > > +{ > > + if (mem) > > + return mem_cgroup_lru_to_page(zone, mem, lru); > > + return lru_to_page(&zone->lru[lru].list); > > +} > > Wouldn't it better to have those names consistent? > mem_cgroup_lru_tailpage vs lru_tailpage? It's bad naming alright, but what is the wrapper for both of them supposed to be called then? Note that this function is only temporary, though, that's why I did not spent much time on looking for a better name. When the per-memcg lru lists finally become exclusive, this is removed and the function converted to work on lruvecs. Would you be okay with just adding an /* XXX */ to the function in this patch that mentions that it's only temporary? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org