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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 14AD6C31E44 for ; Sat, 15 Jun 2019 02:15:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CF02C2133D for ; Sat, 15 Jun 2019 02:14:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725999AbfFOCO7 (ORCPT ); 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-hyperv-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@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=