Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757670AbcJZSLE (ORCPT ); Wed, 26 Oct 2016 14:11:04 -0400 Received: from mail-oi0-f48.google.com ([209.85.218.48]:36792 "EHLO mail-oi0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757238AbcJZSLB (ORCPT ); Wed, 26 Oct 2016 14:11:01 -0400 MIME-Version: 1.0 In-Reply-To: <996124132.13035408.1477505043741.JavaMail.zimbra@redhat.com> References: <996124132.13035408.1477505043741.JavaMail.zimbra@redhat.com> From: Linus Torvalds Date: Wed, 26 Oct 2016 11:10:53 -0700 X-Google-Sender-Auth: X8-6ToE5slrpt125iLOtngnhC7U Message-ID: Subject: Re: CONFIG_VMAP_STACK, on-stack struct, and wake_up_bit To: Bob Peterson Cc: Andy Lutomirski , Andreas Gruenbacher , Peter Zijlstra , Andy Lutomirski , LKML , Steven Whitehouse , Mel Gorman , linux-mm Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 865 Lines: 21 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. 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. 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). Linus