Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422694AbbENT6Q (ORCPT ); Thu, 14 May 2015 15:58:16 -0400 Received: from www.linutronix.de ([62.245.132.108]:39064 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030232AbbENT6O (ORCPT ); Thu, 14 May 2015 15:58:14 -0400 Date: Thu, 14 May 2015 21:58:11 +0200 From: Sebastian Andrzej Siewior To: Jan Kiszka Cc: RT , Linux Kernel Mailing List , Steven Rostedt , Mike Galbraith Subject: Re: [PATCH v2 RT 3.18] irq_work: Provide a soft-irq based queue Message-ID: <20150514195811.GJ13442@linutronix.de> References: <5538A0DF.50401@siemens.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <5538A0DF.50401@siemens.com> X-Key-Id: 2A8CF5D1 X-Key-Fingerprint: 6425 4695 FFF0 AA44 66CC 19E6 7B96 E816 2A8C F5D1 User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 651 Lines: 18 * Jan Kiszka | 2015-04-23 09:35:59 [+0200]: >Instead of turning all irq_work requests into lazy ones on -rt, just >move their execution from hard into soft-irq context. > >This resolves deadlocks of ftrace which will queue work from arbitrary >contexts, including those that have locks held that are needed for >raising a soft-irq. > >Signed-off-by: Jan Kiszka Applied Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/