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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,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 A9824C282C4 for ; Tue, 12 Feb 2019 18:29:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 82A55222C4 for ; Tue, 12 Feb 2019 18:29:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731557AbfBLS3P (ORCPT ); Tue, 12 Feb 2019 13:29:15 -0500 Received: from shards.monkeyblade.net ([23.128.96.9]:55854 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726049AbfBLS3O (ORCPT ); Tue, 12 Feb 2019 13:29:14 -0500 Received: from localhost (96-89-128-221-static.hfc.comcastbusiness.net [96.89.128.221]) (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 5F78714C4CCB8; Tue, 12 Feb 2019 10:29:13 -0800 (PST) Date: Tue, 12 Feb 2019 10:29:12 -0800 (PST) Message-Id: <20190212.102912.1498886718723769885.davem@davemloft.net> To: frederic@kernel.org Cc: linux-kernel@vger.kernel.org, bigeasy@linutronix.de, peterz@infradead.org, mchehab@s-opensource.com, torvalds@linux-foundation.org, tglx@linutronix.de, paulmck@linux.vnet.ibm.com, fweisbec@gmail.com, pkondeti@codeaurora.org, mingo@kernel.org, joel@joelfernandes.org Subject: Re: [PATCH 00/32] softirq: Per vector masking v2 From: David Miller In-Reply-To: <20190212171423.8308-1-frederic@kernel.org> References: <20190212171423.8308-1-frederic@kernel.org> X-Mailer: Mew version 6.8 on Emacs 26.1 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]); Tue, 12 Feb 2019 10:29:13 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Frederic Weisbecker Date: Tue, 12 Feb 2019 18:13:51 +0100 > For those who missed the infinitely invasive and carpal tunnel > unfriendly v1: https://lwn.net/Articles/768157/ > > Softirqs masking is an all or nothing operation. It's currently not > possible to disable a single vector. Yet some workloads are interested > in deterministic latencies for vectors execution. Reducing their > interdependencies is a first step toward that. > > Unlike the previous take, the current APIs aren't changed, as advised > by reviewers. But new APIs have been introduced. An individual vector > can be disabled and that behaviour can self-nest and nest with existing > APIs: ... I really like this stuff, nice work: Reviewed-by: David S. Miller