From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35572 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726720AbgH1PUJ (ORCPT ); Fri, 28 Aug 2020 11:20:09 -0400 Received: from mail-qk1-x743.google.com (mail-qk1-x743.google.com [IPv6:2607:f8b0:4864:20::743]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B350CC061264 for ; Fri, 28 Aug 2020 08:20:08 -0700 (PDT) Received: by mail-qk1-x743.google.com with SMTP id u3so1247613qkd.9 for ; Fri, 28 Aug 2020 08:20:08 -0700 (PDT) Date: Fri, 28 Aug 2020 12:20:06 -0300 From: Jason Gunthorpe Subject: Re: [RFC PATCH 0/2] mm/gup: fix gup_fast with dynamic page table folding Message-ID: <20200828152006.GY24045@ziepe.ca> References: <20200828140314.8556-1-gerald.schaefer@linux.ibm.com> <20200828142137.GX24045@ziepe.ca> <20200828170103.6d954d95@thinkpad> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200828170103.6d954d95@thinkpad> Sender: linux-s390-owner@vger.kernel.org List-ID: To: Gerald Schaefer Cc: Linus Torvalds , Andrew Morton , linux-mm , LKML , Vasily Gorbik , Alexander Gordeev , linux-s390@vger.kernel.org, Heiko Carstens , Claudio Imbrenda , Christian Borntraeger On Fri, Aug 28, 2020 at 05:01:03PM +0200, Gerald Schaefer wrote: > Just to make sure, you are referring to some future / planned > changes to mm/pagewalk.c, and not some currently existing > pagetable walkers already using the READ_ONCE logic w/o > spinlocks? Yes no current code, just something I've been looking at slowly. Jason