From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-f51.google.com (mail-lf0-f51.google.com [209.85.215.51]) by kanga.kvack.org (Postfix) with ESMTP id AD9F96B0038 for ; Wed, 16 Dec 2015 09:47:53 -0500 (EST) Received: by mail-lf0-f51.google.com with SMTP id p203so31126564lfa.0 for ; Wed, 16 Dec 2015 06:47:53 -0800 (PST) Received: from mail-lf0-f41.google.com (mail-lf0-f41.google.com. [209.85.215.41]) by mx.google.com with ESMTPS id 198si4033229lff.81.2015.12.16.06.47.52 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 16 Dec 2015 06:47:52 -0800 (PST) Received: by mail-lf0-f41.google.com with SMTP id l133so30629044lfd.2 for ; Wed, 16 Dec 2015 06:47:52 -0800 (PST) Date: Wed, 16 Dec 2015 15:47:50 +0100 From: Michal Hocko Subject: Re: [PATCH] mm: make sure isolate_lru_page() is never called for tail page Message-ID: <20151216144749.GB23092@dhcp22.suse.cz> References: <1450276170-140679-1-git-send-email-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1450276170-140679-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: "Kirill A. Shutemov" Cc: Andrew Morton , linux-mm@kvack.org On Wed 16-12-15 16:29:30, Kirill A. Shutemov wrote: > The VM_BUG_ON_PAGE() would catch such cases if any still exists. Thanks, this better than a silent breakage. > Signed-off-by: Kirill A. Shutemov Acked-by: Michal Hocko > --- > mm/vmscan.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/mm/vmscan.c b/mm/vmscan.c > index 964390906167..05dd182f04fd 100644 > --- a/mm/vmscan.c > +++ b/mm/vmscan.c > @@ -1436,6 +1436,7 @@ int isolate_lru_page(struct page *page) > int ret = -EBUSY; > > VM_BUG_ON_PAGE(!page_count(page), page); > + VM_BUG_ON_PAGE(PageTail(page), page); > > if (PageLRU(page)) { > struct zone *zone = page_zone(page); > -- > 2.6.2 -- Michal Hocko SUSE Labs -- 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/ . Don't email: email@kvack.org