Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933008AbcJZTMT (ORCPT ); Wed, 26 Oct 2016 15:12:19 -0400 Received: from mx6-phx2.redhat.com ([209.132.183.39]:52531 "EHLO mx6-phx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932323AbcJZTMR (ORCPT ); Wed, 26 Oct 2016 15:12:17 -0400 Date: Wed, 26 Oct 2016 15:11:42 -0400 (EDT) From: Bob Peterson To: Linus Torvalds Cc: Andy Lutomirski , Andreas Gruenbacher , Peter Zijlstra , Andy Lutomirski , LKML , Steven Whitehouse , Mel Gorman , linux-mm Message-ID: <1536202752.13054466.1477509102622.JavaMail.zimbra@redhat.com> In-Reply-To: References: <996124132.13035408.1477505043741.JavaMail.zimbra@redhat.com> Subject: Re: CONFIG_VMAP_STACK, on-stack struct, and wake_up_bit MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [10.3.116.61] X-Mailer: Zimbra 8.0.6_GA_5922 (ZimbraWebClient - FF49 (Linux)/8.0.6_GA_5922) Thread-Topic: CONFIG_VMAP_STACK, on-stack struct, and wake_up_bit Thread-Index: 2uloJifcWqaPEXh4I7RlBR+hbYDKfg== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1174 Lines: 30 ----- Original Message ----- | On Wed, Oct 26, 2016 at 11:04 AM, Bob Peterson wrote: | > | > I can test it for you, if you give me about an hour. Sorry. I guess I underestimated the time it takes to build a kernel on my test box. It will take a little longer, but it's compiling now. | I can definitely wait an hour, it would be lovely to see more testing. | Especially if you have a NUMA machine and an interesting workload. I'll see what I can cook up. | And if you actually have that NUMA machine and a load that shows the | page_waietutu effects, it would also be lovely if you can then | _additionally_ test the patch that PeterZ wrote a few weeks ago, it | was on the mm list about a month ago: | | Date: Thu, 29 Sep 2016 15:08:27 +0200 | From: Peter Zijlstra | Subject: Re: page_waitqueue() considered harmful | Message-ID: <20160929130827.GX5016@twins.programming.kicks-ass.net> | | and if you don't find it I can forward it to you (Peter had a few | versions, that latest one is the one that looked best). I'll see what I can do, but first I'll check basic functionality and report back. Bob Peterson