From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752577AbaIAGkN (ORCPT ); Mon, 1 Sep 2014 02:40:13 -0400 Received: from mga09.intel.com ([134.134.136.24]:9988 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751131AbaIAGkL (ORCPT ); Mon, 1 Sep 2014 02:40:11 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.04,440,1406617200"; d="scan'208";a="566436313" Message-ID: <540414AB.9000004@linux.intel.com> Date: Mon, 01 Sep 2014 09:39:39 +0300 From: Eliezer Tamir User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.0 MIME-Version: 1.0 To: Jason Wang , Ingo Molnar CC: Mike Galbraith , davem@davemloft.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, mst@redhat.com, Peter Zijlstra , Ingo Molnar Subject: Re: [PATCH net-next 2/2] net: exit busy loop when another process is runnable References: <1408608310-13579-1-git-send-email-jasowang@redhat.com> <1408608310-13579-2-git-send-email-jasowang@redhat.com> <1408683665.5648.69.camel@marge.simpson.net> <53F6F14B.1030609@redhat.com> <20140822074224.GB7372@gmail.com> <53FFEEC0.4000304@redhat.com> In-Reply-To: <53FFEEC0.4000304@redhat.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 29/08/2014 06:08, Jason Wang wrote: > Yes, but rx busy polling only works in process context and does not > disable bh, so it may be not an issue. sk_busy_loop() uses rcu_read_lock_bh(), so it does run with bh disabled. -Eliezer