From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx179.postini.com [74.125.245.179]) by kanga.kvack.org (Postfix) with SMTP id 191346B0037 for ; Fri, 15 Mar 2013 09:35:50 -0400 (EDT) Received: by mail-ob0-f171.google.com with SMTP id x4so3207716obh.30 for ; Fri, 15 Mar 2013 06:35:49 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20130315132911.63716E0085@blue.fi.intel.com> References: <1363283435-7666-1-git-send-email-kirill.shutemov@linux.intel.com> <1363283435-7666-20-git-send-email-kirill.shutemov@linux.intel.com> <20130315132911.63716E0085@blue.fi.intel.com> Date: Fri, 15 Mar 2013 21:35:49 +0800 Message-ID: Subject: Re: [PATCHv2, RFC 19/30] thp, mm: split huge page on mmap file page From: Hillf Danton Content-Type: text/plain; charset=UTF-8 Sender: owner-linux-mm@kvack.org List-ID: To: "Kirill A. Shutemov" Cc: Andrea Arcangeli , Andrew Morton , Al Viro , Hugh Dickins , Wu Fengguang , Jan Kara , Mel Gorman , linux-mm@kvack.org, Andi Kleen , Matthew Wilcox , "Kirill A. Shutemov" , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org On Fri, Mar 15, 2013 at 9:29 PM, Kirill A. Shutemov wrote: > Hillf Danton wrote: >> On Fri, Mar 15, 2013 at 1:50 AM, Kirill A. Shutemov >> wrote: >> > >> > We are not ready to mmap file-backed tranparent huge pages. >> > >> It is not on todo list either. > > Actually, following patches implement mmap for file-backed thp and this > split_huge_page() will catch only fallback cases. > I wonder if the effort we pay for THP cache is nuked by mmap. -- 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