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[209.132.180.67]) by mx.google.com with ESMTP id g23si1198227pfb.87.2018.03.09.09.43.44; Fri, 09 Mar 2018 09:43:58 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@infradead.org header.s=merlin.20170209 header.b=QcSmmzk5; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932424AbeCIRmj (ORCPT + 99 others); Fri, 9 Mar 2018 12:42:39 -0500 Received: from merlin.infradead.org ([205.233.59.134]:47518 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932288AbeCIRme (ORCPT ); Fri, 9 Mar 2018 12:42:34 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=+WWf/zoq4ZL+rKliR6uu8o2bRaAp+FuIy+z9r8mu9dc=; b=QcSmmzk5CDbHmnfSEkGfMAMk5 OddNf910h/HHhsht3gAmAcy9C5GGYjo6pfuqJz2QBINijULZ3wm6kVzhFYUacDgXdzYf1a+RLRwmb d081zqrQ55GF1wojTeC21i7GtE5FvlygtG9a93FVKOsYgIH56akdvO928XvPOoQOvUj9bccT9vzuJ 8cPiVd+iMjQ6cwqFuF+5laxy4OWDpHH1SwQFzW8A+r7UEHHdNkhL3xN1+u+MI3PfU3DGL0n4sWR0n lB0ieUPlnpFCesKkbvZrpynksFhnD4JocjtCR6Cu6RvKIO2LTLLEwfnpD/yFwzGQC3Kt0sAURy7ty mCKUvyJVA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.89 #1 (Red Hat Linux)) id 1euM28-0000E3-T1; Fri, 09 Mar 2018 17:42:21 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 362AB2029FA14; Fri, 9 Mar 2018 18:42:18 +0100 (CET) Date: Fri, 9 Mar 2018 18:42:18 +0100 From: Peter Zijlstra To: Vince Weaver Cc: kan.liang@linux.intel.com, linux-kernel@vger.kernel.org, tglx@linutronix.de, torvalds@linux-foundation.org, eranian@google.com, acme@redhat.com, hpa@zytor.com, alexander.shishkin@linux.intel.com, mingo@kernel.org, jolsa@redhat.com, linux-tip-commits@vger.kernel.org Subject: Re: [tip:perf/core] perf/x86/intel: Disable userspace RDPMC usage for large PEBS Message-ID: <20180309174218.GB4064@hirez.programming.kicks-ass.net> References: <1518474035-21006-6-git-send-email-kan.liang@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.3 (2018-01-21) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 09, 2018 at 09:31:11AM -0500, Vince Weaver wrote: > On Fri, 9 Mar 2018, tip-bot for Kan Liang wrote: > > > Commit-ID: 1af22eba248efe2de25658041a80a3d40fb3e92e > > Gitweb: https://git.kernel.org/tip/1af22eba248efe2de25658041a80a3d40fb3e92e > > Author: Kan Liang > > AuthorDate: Mon, 12 Feb 2018 14:20:35 -0800 > > Committer: Ingo Molnar > > CommitDate: Fri, 9 Mar 2018 08:22:23 +0100 > > > > perf/x86/intel: Disable userspace RDPMC usage for large PEBS > > > > > So this whole commit log is about disabling RDPMC usage for "large PEBS" > but the actual change disables RDPMC if "PERF_X86_EVENT_FREERUNNING" > > Either the commit log is really misleading, or else a poor name was chosen > for this feature. Its the same thing, and yes that might want renaming I suppose.