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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_2 autolearn=no 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 75007C54E4B for ; Mon, 11 May 2020 20:50:50 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3C7DA2078A for ; Mon, 11 May 2020 20:50:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3C7DA2078A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id D2AD7900081; Mon, 11 May 2020 16:50:49 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id CDAC0900036; Mon, 11 May 2020 16:50:49 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C1A83900081; Mon, 11 May 2020 16:50:49 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0058.hostedemail.com [216.40.44.58]) by kanga.kvack.org (Postfix) with ESMTP id AA900900036 for ; Mon, 11 May 2020 16:50:49 -0400 (EDT) Received: from smtpin23.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 6D3A93AB6 for ; Mon, 11 May 2020 20:50:49 +0000 (UTC) X-FDA: 76805632218.23.twig29_24416e333135a X-HE-Tag: twig29_24416e333135a X-Filterd-Recvd-Size: 2510 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf11.hostedemail.com (Postfix) with ESMTP for ; Mon, 11 May 2020 20:50:49 +0000 (UTC) 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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