Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934880AbaFTQaa (ORCPT ); Fri, 20 Jun 2014 12:30:30 -0400 Received: from e34.co.us.ibm.com ([32.97.110.152]:60675 "EHLO e34.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756687AbaFTQa2 (ORCPT ); Fri, 20 Jun 2014 12:30:28 -0400 Date: Fri, 20 Jun 2014 09:30:23 -0700 From: "Paul E. McKenney" To: Christoph Lameter Cc: josh@joshtriplett.org, Andi Kleen , Dave Hansen , LKML , "Chen, Tim C" Subject: Re: [bisected] pre-3.16 regression on open() scalability Message-ID: <20140620163023.GE4904@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20140619180916.GE4904@linux.vnet.ibm.com> <20140619204220.GJ4904@linux.vnet.ibm.com> <20140619213203.GA16747@cloud> <20140619230732.GX4904@linux.vnet.ibm.com> <20140620153839.GB4904@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14062016-1542-0000-0000-000002B5E55F Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 20, 2014 at 11:07:13AM -0500, Christoph Lameter wrote: > On Fri, 20 Jun 2014, Paul E. McKenney wrote: > > > And the fraction of the small systems that care that much about latency > > is also quite small. > > This also impacts general performance of course not only latency. > > > Of course, if you have performance results that show otherwise, please > > share them. > > We are discussing a performance problem right here. We are engaging in a lot of -speculation- about an -alleged- performance problem. I have posted a fix to the actual performance problem, but the guy reporting the original report of that problem has not yet reported the performance of the fix. Which is fine, as I am getting ready to post an updated fix, and besides which he might well have higher-priority tasks requiring his attention. But without that performance information, we are all just engaging in baseless speculation. Thanx, Paul -- 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/