From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2992826AbcB1ErF (ORCPT ); Sat, 27 Feb 2016 23:47:05 -0500 Received: from shards.monkeyblade.net ([149.20.54.216]:49463 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2992703AbcB1ErD (ORCPT ); Sat, 27 Feb 2016 23:47:03 -0500 Date: Sat, 27 Feb 2016 23:46:57 -0500 (EST) Message-Id: <20160227.234657.984787532933890615.davem@davemloft.net> To: peter@hurleysoftware.com Cc: eric.dumazet@gmail.com, edumazet@google.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org, dmaengine@vger.kernel.org, john.ogness@linutronix.de, bigeasy@linutronix.de, akpm@linux-foundation.org Subject: Re: Softirq priority inversion from "softirq: reduce latencies" From: David Miller In-Reply-To: <56D25713.8050307@hurleysoftware.com> References: <56D23266.2080306@hurleysoftware.com> <1456624766.648.43.camel@edumazet-ThinkPad-T530> <56D25713.8050307@hurleysoftware.com> X-Mailer: Mew version 6.7 on Emacs 24.5 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Sat, 27 Feb 2016 20:47:01 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Peter Hurley Date: Sat, 27 Feb 2016 18:10:27 -0800 > That tasklet should run before any process. You never have this guarantee, even before Eric's patch. Under load tasklets run from ksoftirqd just like any other softirq. Please fix your driver and stop blaming Eric's change. Thank you.