Received: by 2002:a05:6a10:5bc5:0:0:0:0 with SMTP id os5csp413425pxb; Thu, 21 Oct 2021 01:58:44 -0700 (PDT) X-Google-Smtp-Source: ABdhPJw81tGpcn5QETmqkL5klbmuHrVQrZvE7oRjBgMVWeckc9MUbS75ITzxRNec3O3WFML3m34l X-Received: by 2002:aa7:9e9e:0:b0:44c:c821:c132 with SMTP id p30-20020aa79e9e000000b0044cc821c132mr4069053pfq.61.1634806724498; Thu, 21 Oct 2021 01:58:44 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1634806724; cv=none; d=google.com; s=arc-20160816; b=dsa3tP5jmqjUN1Z+oNLpT4hOpRtbyCwUQ1MD8BpE1SsfVm/8AnCXxd1wJkR7rJ+78a rgkW4/UXK3drek6FeIfQg3btnbpdgPsFNkVKMA7hUb0SKxFHtgS5StkSIAnsikpa2/sE O0JCOFzeDDmwgFKw1OYYfc8Un9wq7xD/hCphTRZCZbmo6osAanPD39AqZeSqKgclWC0V vejNUP69BUU3JcwQwYU+uGVbyvU35C0dfWkg8eELgui2lk3RGauLI0722BvniB1aID/7 N7EUWXeSz0+JCBUVSuLtHHt3aYlGEUcsiPaRFquDgf7ouHCOOpTS/CrFaTVzl7yqaD3M WRwQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:in-reply-to :mime-version:user-agent:date:message-id:from:references:cc:to :subject; bh=POLxozGjJVXdpO06CCL6EoFqmz14caSGU/NyscG34lw=; b=pVy4XvNN5AdC6/BsadbSWxS8P5YH/qMTbBsiMK2cT7Bz4lxvD7VvcVPPsIZJsxB0Tr quq+2r52R8txy/xJOywwgSkHhHu5G0SPLoHMPxP4N1q91uQ3cEC7SDjIAi6sArN5+k8O M7ff3iw39Fw5MhiXC/DDoVdQcSCjFABF5Ruiovz1VSDlFiKHfb6cXChzVLK5lZIvrGpA xhGyLSR/qcGz0ScTFDLFHU5rdnEk1TDplkHaPnCLd18crTqWRCHjfxZ0577d8QF8uNHB nDjp1/WJSqW4/QDTvYknsIz/PBeN5THgJtTUJq0NUNHwhrlv+Z/U8jwYESeCzTjfFlde hZnw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=alibaba.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id s7si5855626pjp.159.2021.10.21.01.58.15; Thu, 21 Oct 2021 01:58:44 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=alibaba.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231489AbhJUI65 (ORCPT + 99 others); Thu, 21 Oct 2021 04:58:57 -0400 Received: from out4436.biz.mail.alibaba.com ([47.88.44.36]:4159 "EHLO out4436.biz.mail.alibaba.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231461AbhJUI64 (ORCPT ); Thu, 21 Oct 2021 04:58:56 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R191e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04400;MF=xianting.tian@linux.alibaba.com;NM=1;PH=DS;RN=9;SR=0;TI=SMTPD_---0Ut7VcNC_1634806588; Received: from B-LB6YLVDL-0141.local(mailfrom:xianting.tian@linux.alibaba.com fp:SMTPD_---0Ut7VcNC_1634806588) by smtp.aliyun-inc.com(127.0.0.1); Thu, 21 Oct 2021 16:56:29 +0800 Subject: Re: [PATCH v11 0/3] make hvc pass dma capable memory to its backend To: Greg KH Cc: jirislaby@kernel.org, amit@kernel.org, arnd@arndb.de, osandov@fb.com, shile.zhang@linux.alibaba.com, linuxppc-dev@lists.ozlabs.org, virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org References: <20211015024658.1353987-1-xianting.tian@linux.alibaba.com> From: Xianting Tian Message-ID: <16ffdf1c-7ea9-7466-fcc5-7e6b09ca5a28@linux.alibaba.com> Date: Thu, 21 Oct 2021 16:56:28 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I am very glad to get this reply:) Thank you and other experts' kindly help and guide, which improved me a lot. 在 2021/10/21 下午4:35, Greg KH 写道: > On Fri, Oct 15, 2021 at 10:46:55AM +0800, Xianting Tian wrote: >> Dear all, >> >> This patch series make hvc framework pass DMA capable memory to >> put_chars() of hvc backend(eg, virtio-console), and revert commit >> c4baad5029 ("virtio-console: avoid DMA from stack”) > Thanks for sticking with this, looks much better now, all now queued up. > > greg k-h