From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753311AbaIBKul (ORCPT ); Tue, 2 Sep 2014 06:50:41 -0400 Received: from casper.infradead.org ([85.118.1.10]:33175 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750863AbaIBKuk (ORCPT ); Tue, 2 Sep 2014 06:50:40 -0400 Date: Tue, 2 Sep 2014 12:50:36 +0200 From: Peter Zijlstra To: Jiri Olsa Cc: linux-kernel@vger.kernel.org, Andi Kleen , Arnaldo Carvalho de Melo , Corey Ashford , David Ahern , Frederic Weisbecker , Ingo Molnar , "Jen-Cheng(Tommy) Huang" , Namhyung Kim , Paul Mackerras , Stephane Eranian Subject: Re: [PATCH 1/9] perf: Remove redundant parent context check from context_equiv Message-ID: <20140902105036.GH5806@worktop.ger.corp.intel.com> References: <1408977943-16594-1-git-send-email-jolsa@kernel.org> <1408977943-16594-2-git-send-email-jolsa@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1408977943-16594-2-git-send-email-jolsa@kernel.org> User-Agent: Mutt/1.5.22.1 (2013-10-16) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Aug 25, 2014 at 04:45:35PM +0200, Jiri Olsa wrote: > As described in commit: > 1f9a7268c67f perf: Do not allow optimized switch for non-cloned events > we dont allow optimized switch for non cloned contexts. > > There's no need now to check if one of the context is parent > of the other in context_equiv function. > OK, so talk to me about that patch; it looks like you're slowly reverting: 5a3126d4fe7c ("perf: Fix the perf context switch optimization"). So what exactly is the problem? I'm still jet-lagged and not seeing it.