From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8AD0FC19759 for ; Thu, 1 Aug 2019 17:49:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5D0D3206A2 for ; Thu, 1 Aug 2019 17:49:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=cmpxchg-org.20150623.gappssmtp.com header.i=@cmpxchg-org.20150623.gappssmtp.com header.b="H1rBOX4e" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387782AbfHARtL (ORCPT ); Thu, 1 Aug 2019 13:49:11 -0400 Received: from mail-pf1-f195.google.com ([209.85.210.195]:36626 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731061AbfHARtL (ORCPT ); Thu, 1 Aug 2019 13:49:11 -0400 Received: by mail-pf1-f195.google.com with SMTP id r7so34494390pfl.3 for ; Thu, 01 Aug 2019 10:49:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cmpxchg-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=y6hdHpqGEBI+iVGPp14PxolI5mp64P3aoDRclef1uXs=; b=H1rBOX4e1UB8ZnKJ7SDE6klXGJFF3zsPjduSN8Z02OId7gY00conT5jk0RaL2uwfBx aPVZxDsYAshkjMZ257WbkZfNRR7PdiePMxjFeWn2g93Q9sTPRv6V9OCXAIz971KnliG5 mhA5ONZyx7jNiWP5kYa2471dy4bF6cxu98jZbjlSPvg1DKgriB6dNbyIOHAMIAa8eJhK jAx7Gx3scQVZDiEgnF4b0b99HuzHJIZaioGVMgPP5YA0Lq1VN2O5dlqfdXoN46xlllGH pe2YPuV3WWwqiIBvMj3V7xpuM7RsPCjGIhJbaETmKoDsb4w/HJQ18qNCq3OPVaSwjUML /OAw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=y6hdHpqGEBI+iVGPp14PxolI5mp64P3aoDRclef1uXs=; b=EsbO3edZdTpMFpRujKU9xLoFFcZbPpafSSE7TFfdkvJGQ6B5dIQuDgNLYAx8Qgdudk +dK4Xz4meCI7/EuV18uCIOC9EitQAuutg2YxLtt3LsuxTIkMezULKlMVqtAANZ929olm vBZ4IQ1ELM5Q9qMI8NpBL/1Mjxwe0bjPVLysicIk0gC8v4p2scU+bVyBvnIznexKzIyf yhoHmWgTsvpdu+/GqpzGCSi7t8G2UWuQH6wsdt+AV+94rPuimN8UiYvTN5Ktm9Ev48fv hryR+RXJCy+lFi3jl6wUo4cld1rBvs8z84bJCwBIUoKEQmjaUZUfHmEYWpvuMox3zs76 Fmxg== X-Gm-Message-State: APjAAAVJ0HcC8f/pEGK0rbFrJaVWkUqhLa8qaQD1e1ZJ13XrKzy9FyjM P9HX4MxHUfz8Y+N+Zv8aysI= X-Google-Smtp-Source: APXvYqwG6QCNgn3q8ZubpYM4sdBg+SifuSKIr4EsSNa27iacMuRB6yqyNVkq6uIotPklc5Bav20CHw== X-Received: by 2002:a63:4041:: with SMTP id n62mr49026346pga.312.1564681750112; Thu, 01 Aug 2019 10:49:10 -0700 (PDT) Received: from localhost ([2620:10d:c091:500::3:533]) by smtp.gmail.com with ESMTPSA id b136sm93410600pfb.73.2019.08.01.10.49.08 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 01 Aug 2019 10:49:09 -0700 (PDT) Date: Thu, 1 Aug 2019 13:49:07 -0400 From: Johannes Weiner To: Peter Zijlstra Cc: mingo@kernel.org, linux-kernel@vger.kernel.org, Suren Baghdasaryan , Thomas Gleixner Subject: Re: [PATCH 1/5] sched/pci: Reduce psimon FIFO priority Message-ID: <20190801174907.GA16554@cmpxchg.org> References: <20190801111348.530242235@infradead.org> <20190801111541.685367413@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190801111541.685367413@infradead.org> User-Agent: Mutt/1.12.0 (2019-05-25) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Aug 01, 2019 at 01:13:49PM +0200, Peter Zijlstra wrote: > PSI defaults to a FIFO-99 thread, reduce this to FIFO-1. > > FIFO-99 is the very highest priority available to SCHED_FIFO and > it not a suitable default; it would indicate the psi work is the > most important work on the machine. > > Since Real-Time tasks will have pre-allocated memory and locked it in > place, Real-Time tasks do not care about PSI. All it needs is to be > above OTHER. > > Cc: Suren Baghdasaryan > Cc: Johannes Weiner > Cc: Thomas Gleixner > Signed-off-by: Peter Zijlstra (Intel) Acked-by: Johannes Weiner Subject should be s/pci/psi/