From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yw1-f71.google.com (mail-yw1-f71.google.com [209.85.161.71]) by kanga.kvack.org (Postfix) with ESMTP id C5A956B7530 for ; Wed, 5 Sep 2018 17:43:10 -0400 (EDT) Received: by mail-yw1-f71.google.com with SMTP id d23-v6so6044044ywb.2 for ; Wed, 05 Sep 2018 14:43:10 -0700 (PDT) Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id f64-v6sor591018ybf.78.2018.09.05.14.43.05 for (Google Transport Security); Wed, 05 Sep 2018 14:43:05 -0700 (PDT) Date: Wed, 5 Sep 2018 17:43:03 -0400 From: Johannes Weiner Subject: Re: [PATCH 0/9] psi: pressure stall information for CPU, memory, and IO v4 Message-ID: <20180905214303.GA30178@cmpxchg.org> References: <20180828172258.3185-1-hannes@cmpxchg.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180828172258.3185-1-hannes@cmpxchg.org> Sender: owner-linux-mm@kvack.org List-ID: To: Ingo Molnar , Peter Zijlstra , Andrew Morton , Linus Torvalds Cc: Tejun Heo , Suren Baghdasaryan , Daniel Drake , Vinayak Menon , Christopher Lameter , Peter Enderborg , Shakeel Butt , Mike Galbraith , linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@fb.com On Tue, Aug 28, 2018 at 01:22:49PM -0400, Johannes Weiner wrote: > This version 4 of the PSI series incorporates feedback from Peter and > fixes two races in the lockless aggregator that Suren found in his > testing and which caused the sample calculation to sometimes underflow > and record bogusly large samples; details at the bottom of this email. Peter, do the changes from v3 look sane to you? If there aren't any further objections, I was hoping we could get this lined up for 4.20.