From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx194.postini.com [74.125.245.194]) by kanga.kvack.org (Postfix) with SMTP id C9E376B0027 for ; Fri, 15 Mar 2013 09:43:49 -0400 (EDT) From: "Kirill A. Shutemov" In-Reply-To: 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> Subject: Re: [PATCHv2, RFC 19/30] thp, mm: split huge page on mmap file page Content-Transfer-Encoding: 7bit Message-Id: <20130315134528.8BD83E0085@blue.fi.intel.com> Date: Fri, 15 Mar 2013 15:45:28 +0200 (EET) Sender: owner-linux-mm@kvack.org List-ID: To: Hillf Danton Cc: "Kirill A. Shutemov" , 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 Hillf Danton wrote: > 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. I will not be nuked after patch 30/30. Actually, it will be splited only if process tries to map hugepage with unsuitable alignment. -- Kirill A. Shutemov -- 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