From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755670AbdKCIdK (ORCPT ); Fri, 3 Nov 2017 04:33:10 -0400 Received: from mga09.intel.com ([134.134.136.24]:59753 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753378AbdKCIdI (ORCPT ); Fri, 3 Nov 2017 04:33:08 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.44,337,1505804400"; d="scan'208";a="1213778354" Message-ID: <59FC2A47.3020103@intel.com> Date: Fri, 03 Nov 2017 16:35:19 +0800 From: Wei Wang User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 MIME-Version: 1.0 To: "Michael S. Tsirkin" CC: penguin-kernel@I-love.SAKURA.ne.jp, mhocko@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, virtualization@lists.linux-foundation.org Subject: Re: [PATCH v1 0/3] Virtio-balloon Improvement References: <1508500466-21165-1-git-send-email-wei.w.wang@intel.com> <20171022061307-mutt-send-email-mst@kernel.org> In-Reply-To: <20171022061307-mutt-send-email-mst@kernel.org> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/22/2017 11:19 AM, Michael S. Tsirkin wrote: > On Fri, Oct 20, 2017 at 07:54:23PM +0800, Wei Wang wrote: >> This patch series intends to summarize the recent contributions made by >> Michael S. Tsirkin, Tetsuo Handa, Michal Hocko etc. via reporting and >> discussing the related deadlock issues on the mailinglist. Please check >> each patch for details. >> >> >From a high-level point of view, this patch series achieves: >> 1) eliminate the deadlock issue fundamentally caused by the inability >> to run leak_balloon and fill_balloon concurrently; > We need to think about this carefully. Is it an issue that > leak can now bypass fill? It seems that we can now > try to leak a page before fill was seen by host, > but I did not look into it deeply. > > I really like my patch for this better at least for > current kernel. I agree we need to work more on 2+3. > Since we have many customers interested in the "Virtio-balloon Enhancement" series, please review the v17 patches first (it has a dependency on your patch for that deadlock fix, so I included it there too), and we can get back to 2+3 here after that series is done. Thanks. Best, Wei From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f199.google.com (mail-pf0-f199.google.com [209.85.192.199]) by kanga.kvack.org (Postfix) with ESMTP id 11BF46B0261 for ; Fri, 3 Nov 2017 04:33:09 -0400 (EDT) Received: by mail-pf0-f199.google.com with SMTP id 76so2169160pfr.3 for ; Fri, 03 Nov 2017 01:33:09 -0700 (PDT) Received: from mga14.intel.com (mga14.intel.com. [192.55.52.115]) by mx.google.com with ESMTPS id j13si5468720pgf.700.2017.11.03.01.33.07 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 03 Nov 2017 01:33:07 -0700 (PDT) Message-ID: <59FC2A47.3020103@intel.com> Date: Fri, 03 Nov 2017 16:35:19 +0800 From: Wei Wang MIME-Version: 1.0 Subject: Re: [PATCH v1 0/3] Virtio-balloon Improvement References: <1508500466-21165-1-git-send-email-wei.w.wang@intel.com> <20171022061307-mutt-send-email-mst@kernel.org> In-Reply-To: <20171022061307-mutt-send-email-mst@kernel.org> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: "Michael S. Tsirkin" Cc: penguin-kernel@I-love.SAKURA.ne.jp, mhocko@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, virtualization@lists.linux-foundation.org On 10/22/2017 11:19 AM, Michael S. Tsirkin wrote: > On Fri, Oct 20, 2017 at 07:54:23PM +0800, Wei Wang wrote: >> This patch series intends to summarize the recent contributions made by >> Michael S. Tsirkin, Tetsuo Handa, Michal Hocko etc. via reporting and >> discussing the related deadlock issues on the mailinglist. Please check >> each patch for details. >> >> >From a high-level point of view, this patch series achieves: >> 1) eliminate the deadlock issue fundamentally caused by the inability >> to run leak_balloon and fill_balloon concurrently; > We need to think about this carefully. Is it an issue that > leak can now bypass fill? It seems that we can now > try to leak a page before fill was seen by host, > but I did not look into it deeply. > > I really like my patch for this better at least for > current kernel. I agree we need to work more on 2+3. > Since we have many customers interested in the "Virtio-balloon Enhancement" series, please review the v17 patches first (it has a dependency on your patch for that deadlock fix, so I included it there too), and we can get back to 2+3 here after that series is done. Thanks. Best, Wei -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org