From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752739AbaCFKcL (ORCPT ); Thu, 6 Mar 2014 05:32:11 -0500 Received: from merlin.infradead.org ([205.233.59.134]:50605 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752023AbaCFKcJ (ORCPT ); Thu, 6 Mar 2014 05:32:09 -0500 Date: Thu, 6 Mar 2014 11:31:58 +0100 From: Peter Zijlstra To: Tony Lu Cc: Paul Mackerras , Ingo Molnar , Arnaldo Carvalho de Melo , Chris Metcalf , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH 1/4] tile: Add support for handling PMC hardware Message-ID: <20140306103158.GJ9987@twins.programming.kicks-ass.net> References: <20140306091102.GG9987@twins.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Mar 06, 2014 at 10:12:54AM +0000, Tony Lu wrote: > >One thing I didn't spot is a tile irq_work implementation; perf likes to > >have one. > > We do not have tile irq_work for now. It seems like perf works fine > even without the arch irq_work. Anyway, we will investigate it, and > submit it as a separate patch when it gets ready. Yeah, it does work; I have a note somewhere there's a race without it, but I lost the relevant details. I should probably try and reconstruct and either fix or at least comment :/