From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F062CC43381 for ; Thu, 14 Feb 2019 00:00:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BDCAD218FF for ; Thu, 14 Feb 2019 00:00:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="jGrISdXx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387508AbfBNAAD (ORCPT ); Wed, 13 Feb 2019 19:00:03 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:52052 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732400AbfBNAAD (ORCPT ); Wed, 13 Feb 2019 19:00:03 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=b2Y8OC5a1L0hTA7a0DVJp+KO4Zptb0EV6XMOqxk1G+k=; b=jGrISdXx/anAMBh9d7rwMCvlO X0NtwpLdXl/IOKKTTDF7Twpcwfz0rW6tS+/zwtzcuQ3d93A0SXY8xL7hOTY4MM6FfPTtaTBNMRnqP ZLXdu58FC0eXBsxg6WFaQ6JlMZHKXOHvuYKVK7MZCqqlOZ3D9cP8DH5AhTYydoIHdyEMCufTgTPmW iWYm17Yzz+LymbTRAzQSlzPfKQvWXi0VxYr6E1a1+GHA5+r4FdDCVyklGMXKlXOEssNm7hmIfoQVK DUkyZa1sdJ4+TKLTgp3gxgCipDIrVfB6Ah6rhAwBomoBdQs8CzfPmYWFNxeNJO/PQfhV2iRFaryUO d/Tu1WQWw==; Received: from willy by bombadil.infradead.org with local (Exim 4.90_1 #2 (Red Hat Linux)) id 1gu4Rc-0005fL-5B; Thu, 14 Feb 2019 00:00:00 +0000 Date: Wed, 13 Feb 2019 15:59:59 -0800 From: Matthew Wilcox To: Song Liu Cc: "lsf-pc@lists.linux-foundation.org" , "linux-mm@kvack.org" , linux-kernel , linux-raid , "bpf@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" , "Kirill A. Shutemov" Subject: Re: [LSF/MM TOPIC] (again) THP for file systems Message-ID: <20190213235959.GX12668@bombadil.infradead.org> References: <77A00946-D70D-469D-963D-4C4EA20AE4FA@fb.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <77A00946-D70D-469D-963D-4C4EA20AE4FA@fb.com> User-Agent: Mutt/1.9.2 (2017-12-15) Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Wed, Feb 13, 2019 at 10:00:10PM +0000, Song Liu wrote: > I would like to discuss remaining work to bring THP to (non-tmpfs) file systems. > This topic has been discussed multiple times in previous LSF/MM summits [1][2]. > However, there hasn't been much progress since late 2017 (the latest work I can > find is by Kirill A. Shutemov [3]). ... this was literally just discussed. Feel free to review https://lore.kernel.org/lkml/20190212183454.26062-1-willy@infradead.org/ with particular reference to the last three paragraphs of https://lore.kernel.org/lkml/20190208042448.GB21860@bombadil.infradead.org/ > Therefore, we would like discuss (for one more time) what is needed to bring > THP to file systems like ext4, xfs, btrfs, etc. Once we are aligned on the > direction, we are more than happy to commit time and resource to make it happen. I believe the direction is clear. It needs people to do the work. We're critically short of reviewers. I got precious little review of the original XArray work, which made Andrew nervous and delayed its integration. Now I'm getting little review of the followup patches to lay the groundwork for filesystems to support larger page sizes. I have very little patience for this situation.