Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753758AbbG0N6S (ORCPT ); Mon, 27 Jul 2015 09:58:18 -0400 Received: from mx2.suse.de ([195.135.220.15]:54705 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752235AbbG0N6O (ORCPT ); Mon, 27 Jul 2015 09:58:14 -0400 Subject: Re: [PATCH 4/4] mm: remove direct calling of migration To: Gioh Kim , jlayton@poochiereds.net, bfields@fieldses.org, iamjoonsoo.kim@lge.com, viro@zeniv.linux.org.uk, mst@redhat.com, koct9i@gmail.com, minchan@kernel.org, aquini@redhat.com, linux-fsdevel@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, linux-mm@kvack.org References: <1436776519-17337-1-git-send-email-gioh.kim@lge.com> <1436776519-17337-5-git-send-email-gioh.kim@lge.com> Cc: dri-devel@lists.freedesktop.org, akpm@linux-foundation.org, Gioh Kim From: Vlastimil Babka Message-ID: <55B638F1.9090407@suse.cz> Date: Mon, 27 Jul 2015 15:58:09 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0 MIME-Version: 1.0 In-Reply-To: <1436776519-17337-5-git-send-email-gioh.kim@lge.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1780 Lines: 51 On 07/13/2015 10:35 AM, Gioh Kim wrote: > From: Gioh Kim > > Migration is completely generalized so that migrating mobile page > is processed with lru-pages in move_to_new_page. > > Signed-off-by: Gioh Kim > Acked-by: Rafael Aquini Why not just fold this to Patch 3? You already modify this hunk there, and prior to patch 3, the hunk was balloon-pages specific. You made it look generic only to remove it, which is unneeded code churn and I don't think it adds anything wrt e.g. bisectability. > --- > mm/migrate.c | 15 --------------- > 1 file changed, 15 deletions(-) > > diff --git a/mm/migrate.c b/mm/migrate.c > index 53f0081d..e6644ac 100644 > --- a/mm/migrate.c > +++ b/mm/migrate.c > @@ -844,21 +844,6 @@ static int __unmap_and_move(struct page *page, struct page *newpage, > } > } > > - if (unlikely(mobile_page(page))) { > - /* > - * A mobile page does not need any special attention from > - * physical to virtual reverse mapping procedures. > - * Skip any attempt to unmap PTEs or to remap swap cache, > - * in order to avoid burning cycles at rmap level, and perform > - * the page migration right away (proteced by page lock). > - */ > - lock_page(newpage); > - rc = page->mapping->a_ops->migratepage(page->mapping, > - newpage, page, mode); > - unlock_page(newpage); > - goto out_unlock; > - } > - > /* > * Corner case handling: > * 1. When a new swap-cache page is read into, it is added to the LRU > -- 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/