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=-2.5 required=3.0 tests=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 BBE1BC10F00 for ; Wed, 6 Mar 2019 23:32:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9488C206DD for ; Wed, 6 Mar 2019 23:32:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726138AbfCFXc0 (ORCPT ); Wed, 6 Mar 2019 18:32:26 -0500 Received: from nautica.notk.org ([91.121.71.147]:54608 "EHLO nautica.notk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725747AbfCFXcZ (ORCPT ); Wed, 6 Mar 2019 18:32:25 -0500 Received: by nautica.notk.org (Postfix, from userid 1001) id 0F7D5C009; Thu, 7 Mar 2019 00:32:24 +0100 (CET) Date: Thu, 7 Mar 2019 00:32:09 +0100 From: Dominique Martinet To: Andrew Morton Cc: Jiri Kosina , Vlastimil Babka , Linus Torvalds , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-api@vger.kernel.org, Peter Zijlstra , Greg KH , Jann Horn , Andy Lutomirski , Cyril Hrubis , Daniel Gruss , Dave Chinner , Kevin Easton , "Kirill A. Shutemov" , Matthew Wilcox , Tejun Heo Subject: Re: [PATCH 0/3] mincore() and IOCB_NOWAIT adjustments Message-ID: <20190306233209.GA7753@nautica> References: <20190130124420.1834-1-vbabka@suse.cz> <20190306143547.c686225447822beaf3b6e139@linux-foundation.org> <20190306152337.e06cbc530fbfbcfcfe0dc37c@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20190306152337.e06cbc530fbfbcfcfe0dc37c@linux-foundation.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Andrew Morton wrote on Wed, Mar 06, 2019: > On Wed, 6 Mar 2019 23:48:03 +0100 (CET) Jiri Kosina wrote: > > > 3/3 is actually waiting for your decision, see > > > > https://lore.kernel.org/lkml/20190212063643.GL15609@dhcp22.suse.cz/ > > I pity anyone who tried to understand this code by reading this code. > Can we please get some careful commentary in there explaining what is > going on, and why things are thus? > > I guess the [3/3] change makes sense, although it's unclear whether > anyone really needs it? 5.0 was released with 574823bfab8 ("Change > mincore() to count "mapped" pages rather than "cached" pages") so we'll > have a release cycle to somewhat determine how much impact 574823bfab8 > has on users. How about I queue up [3/3] and we reevaluate its > desirability in a couple of months? FWIW, 574823bfab8 has been reverted in 30bac164aca750, included in 5.0-rc4, so the controversial change has only been there from 5.0-rc1 to 5.0-rc3 -- Dominique