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=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 F018AC2BA2B for ; Thu, 9 Apr 2020 14:55:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BE5ED206E9 for ; Thu, 9 Apr 2020 14:55:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=xen.org header.i=@xen.org header.b="po8LC+iH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727902AbgDIOzV (ORCPT ); Thu, 9 Apr 2020 10:55:21 -0400 Received: from mail.xenproject.org ([104.130.215.37]:40796 "EHLO mail.xenproject.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726940AbgDIOzU (ORCPT ); Thu, 9 Apr 2020 10:55:20 -0400 X-Greylist: delayed 1617 seconds by postgrey-1.27 at vger.kernel.org; Thu, 09 Apr 2020 10:55:20 EDT DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=In-Reply-To:Content-Transfer-Encoding:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: 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=88CLnI9d7vqlxpuj08ZyNiGa+C1+B5g5kceeRwldYQw=; b=po8LC+iHiziy3E2x/Sb34Szt44 iStb7gSnx4kP/LR9uZ+C2vryyP6l98PNHg54l8mzGKJORo1GC7Dl6jHR3cTCFKvbnJZY72/dZhAR4 w8fdyOBDM8fhMhaDd4yJNPaUl23wnaPUU6iM0ZN92lVm/ppPnP/rGK4KXDrHgdMMLsPk=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1jMYAC-0007As-PA; Thu, 09 Apr 2020 14:28:16 +0000 Received: from 44.142.6.51.dyn.plus.net ([51.6.142.44] helo=debian) by xenbits.xenproject.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1jMYAC-00041C-Ep; Thu, 09 Apr 2020 14:28:16 +0000 Date: Thu, 9 Apr 2020 15:28:13 +0100 From: Wei Liu To: =?utf-8?B?SsO8cmdlbiBHcm/Dnw==?= Cc: Christoph Hellwig , Wei Liu , Bob Liu , "Durrant, Paul" , Konrad Wilk , Boris Ostrovsky , Stefano Stabellini , xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org Subject: Re: Use of VM_IOREMAP in xenbus Message-ID: <20200409142813.lbxembj7b63b2wmi@debian> References: <20200409061846.GA30241@lst.de> <8074b77d-d784-95ee-8d47-069827855876@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <8074b77d-d784-95ee-8d47-069827855876@suse.com> User-Agent: NeoMutt/20180716 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Christoph On Thu, Apr 09, 2020 at 08:37:48AM +0200, Jürgen Groß wrote: > Adjusting recipient list (dropping David, new mail addresses for Wei and > Paul). > > On 09.04.20 08:18, Christoph Hellwig wrote: > > Hi Wei, > > > > commit ccc9d90a9a8b5 ("xenbus_client: Extend interface to support > > multi-page ring") addes a use of vmap in what is now > > xenbus_map_ring_valloc_hvm, and uses the VM_IOREMAP flag that is > > only really intended for implementing ioremap. Do you remember > > what the reason is that this flag was used? > > I don't remember the reason. I can that flag can be dropped per your reasoning. Wei. > > Juergen