Received: by 2002:a25:ab43:0:0:0:0:0 with SMTP id u61csp81415ybi; Fri, 14 Jun 2019 19:16:11 -0700 (PDT) X-Google-Smtp-Source: APXvYqzXBgquCqGAjI62TxZqmoNl5dpZZ/BsBNkDW3ZAGSvT9v1HTNY1q53n1NTuydYX21NlobNS X-Received: by 2002:a17:902:da4:: with SMTP id 33mr35997221plv.209.1560564971285; Fri, 14 Jun 2019 19:16:11 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1560564971; cv=none; d=google.com; s=arc-20160816; b=o1v4AHSD9Is9KaWN0GJE1TPzMfQKTSfYvMkVAsteabRbcxkGLDyNvfUNo5pOKS8OBD T9UVEr10AojonCdCosdBdcGkr0Hp+uo1fH9vzrMeoyZ1kPTGNdNv/mxtpY7rwe0QI8L/ jgPoZIFhMouauuU2VLgpMlRVcAXnjz9d3sLnp9I+Q8h4W8X/kbpbfVxyadXHfXgqpPQk 8onGSxHROX6Lp/9vP6dQMshwrEvs9RkMhEzctihmO8zUkrcqNxDlleG6cMlFc0Kh1WY4 6yav0RDWXfERic8aPKPg3XCWMLxe5nEYUBwh1tXsplQz9Iy2ijaLBY8DxB4QEFZM5GtQ XCwQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:from:subject:cc:to:message-id:date; bh=SQ/hqAAzWsKIR3JXaj0oDhCflClSAAHq5GSi9OCUEkM=; b=lhywFZe2jmfnna1VJSTtHafoXw7o6IRvVGwXeOKeKuHaaAADdC9OA++xcn+KU7fn6q dEcSeCys+SkJ/EoaO+zYgkf1UH3cc3dog6Kk9zuM/xj8lzFHgnadABKLwLn+WkuC0KJn emxGhETHp5mshWGJAG/dj73lMDAFUTxS137kQdaD0VhdxjuGAxZLWmpycNkF4D8jHM19 /p2wG4v+INTgIOvtbJn4iBRv1PRQjOgLvPtLSGRONW1qRdja9yGuv49aPk/aXWe3kVRn LT8G40VK24hR+hd6ABllL9gFI38wD33/TnyrUN1EJAklcAbr6ysYVOWwc5uTKwfRgz+0 7C3g== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id y34si3794347plb.186.2019.06.14.19.15.55; Fri, 14 Jun 2019 19:16:11 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726405AbfFOCO7 (ORCPT + 99 others); Fri, 14 Jun 2019 22:14:59 -0400 Received: from shards.monkeyblade.net ([23.128.96.9]:57268 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725812AbfFOCO7 (ORCPT ); Fri, 14 Jun 2019 22:14:59 -0400 Received: from localhost (unknown [IPv6:2601:601:9f80:35cd::3d5]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id EDACD133FE74A; Fri, 14 Jun 2019 19:14:56 -0700 (PDT) Date: Fri, 14 Jun 2019 19:14:56 -0700 (PDT) Message-Id: <20190614.191456.407433636343988177.davem@davemloft.net> To: sunilmut@microsoft.com Cc: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, sashal@kernel.org, decui@microsoft.com, mikelley@microsoft.com, netdev@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH net] hvsock: fix epollout hang from race condition From: David Miller In-Reply-To: References: X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=iso-8859-7 Content-Transfer-Encoding: base64 X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Fri, 14 Jun 2019 19:14:57 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org DQpUaGlzIGFkZHMgbG90cyBvZiBuZXcgd2FybmluZ3M6DQoNCm5ldC92bXdfdnNvY2svaHlwZXJ2 X3RyYW5zcG9ydC5jOiBJbiBmdW5jdGlvbiChaHZzX3Byb2JlojoNCm5ldC92bXdfdnNvY2svaHlw ZXJ2X3RyYW5zcG9ydC5jOjIwNToyMDogd2FybmluZzogoXZuZXeiIG1heSBiZSB1c2VkIHVuaW5p dGlhbGl6ZWQgaW4gdGhpcyBmdW5jdGlvbiBbLVdtYXliZS11bmluaXRpYWxpemVkXQ0KICAgcmVt b3RlLT5zdm1fcG9ydCA9IGhvc3RfZXBoZW1lcmFsX3BvcnQrKzsNCiAgIH5+fn5+fn5+fn5+fn5+ fn5+Xn5+fn5+fn5+fn5+fn5+fn5+fn5+fn4NCm5ldC92bXdfdnNvY2svaHlwZXJ2X3RyYW5zcG9y dC5jOjMzMjoyMTogbm90ZTogoXZuZXeiIHdhcyBkZWNsYXJlZCBoZXJlDQogIHN0cnVjdCB2c29j a19zb2NrICp2bmV3Ow0KICAgICAgICAgICAgICAgICAgICAgXn5+fg0KbmV0L3Ztd192c29jay9o eXBlcnZfdHJhbnNwb3J0LmM6NDA2OjIyOiB3YXJuaW5nOiChaHZzX25ld6IgbWF5IGJlIHVzZWQg dW5pbml0aWFsaXplZCBpbiB0aGlzIGZ1bmN0aW9uIFstV21heWJlLXVuaW5pdGlhbGl6ZWRdDQog ICBodnNfbmV3LT52bV9zcnZfaWQgPSAqaWZfdHlwZTsNCiAgIH5+fn5+fn5+fn5+fn5+fn5+fn5e fn5+fn5+fn5+DQpuZXQvdm13X3Zzb2NrL2h5cGVydl90cmFuc3BvcnQuYzozMzM6MjM6IG5vdGU6 IKFodnNfbmV3oiB3YXMgZGVjbGFyZWQgaGVyZQ0KICBzdHJ1Y3QgaHZzb2NrICpodnMsICpodnNf bmV3Ow0KICAgICAgICAgICAgICAgICAgICAgICBefn5+fn5+DQo=