Received: by 2002:a25:868d:0:0:0:0:0 with SMTP id z13csp2172423ybk; Mon, 11 May 2020 13:52:38 -0700 (PDT) X-Google-Smtp-Source: APiQypKz66SSYgufmhjtl1rrOyziv08pmKz1Ep2pJoLvhlWtuHxeenfWinoO776xj6pgMfarEMYb X-Received: by 2002:a50:9a04:: with SMTP id o4mr14593444edb.289.1589230358750; Mon, 11 May 2020 13:52:38 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1589230358; cv=none; d=google.com; s=arc-20160816; b=JtZjd5pvZ55EbD1fWRZ3M7RWT2nEudQhQlapXMbgMMcst/MKPExy/+XKL1DcQuYY/Z vx84Clt+Pqn44IhdTJI5uO7cKZMSWhAPix7bS///SCPG/+NE3WePO1JyIUvL7e3KJqqP 0K9QkczJnD4BnFhyJISX3AbWrtc5YfcYR20W/fHjST7XyrtHcQ3A8lAZqCTjxptOpzd4 2t8ifLq2GeNBC949tJaMU/Xu6Z5yzva8vJWy3Cgx4eEXLotrkFLOLTBKFeYeLrqSxJey x4DOWvw+KoHAIFcBEID9vnkrXAV246bGB/xUyLj0syFXv1cmt5oemdy5AO5Ec0LmrmE7 BYMw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:subject:cc:to:from:date; bh=hY01oGqpNXjdVGTJ5IK3JjqcDuG+BDtpRdDA63+SX1Y=; b=noTihWzi4VYXGDJbwYSXOOLwNnlZUB7+qgQRlw9ItACm6gGlTnCPVqPc6q0GPdaS2d xFrYAPHj21Lf2wxu+OKtJNxm+UoViROD1P/Lxc+gKtyCUqwKe913PZeDKurtHAWIBn/+ trVpPwJp6OzoCH+BfGOU+mM12zSm/BTfkzME5NAs+eoDKCNJFBEexVHTy7FKghDXdSHK AWFB3sdPNf3tg0pQjecr0Ro9AYfTjah8EdxXHibJzNUu1qC+YRiGlXcvEEbTuPrl6qN0 +KVYfNQ1LwaDoI+5YnVIfP7wynb4aqVG+3ZMvlIIY8w35X0pvpVd3iRKOiziHI519ruw M/uA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id k18si6067260edx.296.2020.05.11.13.52.14; Mon, 11 May 2020 13:52:38 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731639AbgEKUus (ORCPT + 99 others); Mon, 11 May 2020 16:50:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:34052 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727873AbgEKUus (ORCPT ); Mon, 11 May 2020 16:50:48 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B1E0820752; Mon, 11 May 2020 20:50:46 +0000 (UTC) Date: Mon, 11 May 2020 16:50:45 -0400 From: Steven Rostedt To: Joerg Roedel Cc: Andy Lutomirski , Peter Zijlstra , Joerg Roedel , X86 ML , "H. Peter Anvin" , Dave Hansen , "Rafael J. Wysocki" , Arnd Bergmann , Andrew Morton , Vlastimil Babka , Michal Hocko , LKML , Linux ACPI , linux-arch , Linux-MM Subject: Re: [RFC PATCH 0/7] mm: Get rid of vmalloc_sync_(un)mappings() Message-ID: <20200511165045.36198080@gandalf.local.home> In-Reply-To: <20200511191414.GY8135@suse.de> References: <20200508144043.13893-1-joro@8bytes.org> <20200508213609.GU8135@suse.de> <20200509175217.GV8135@suse.de> <20200511074243.GE2957@hirez.programming.kicks-ass.net> <20200511191414.GY8135@suse.de> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 11 May 2020 21:14:14 +0200 Joerg Roedel wrote: > > Or maybe we don't want to defeature this much, or maybe the memory hit > > from this preallocation will hurt little 2-level 32-bit systems too > > much. > > It will certainly make Linux less likely to boot on low-memory x86-32 > systems, whoever will be affected by this. That may be an issue, as I'm guessing the biggest users of x86-32, is probably small systems that uses Intel's attempts at the embedded space. -- Steve