Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp454619pxj; Fri, 28 May 2021 07:45:20 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxLN32Hr7GtKmmx1BHuOr9KsBrgkbj4c0sossGuwCiS1rJjnc41dZqK7bGbwoo4RdAGbjn6 X-Received: by 2002:a50:ff13:: with SMTP id a19mr10235614edu.300.1622213120379; Fri, 28 May 2021 07:45:20 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1622213120; cv=none; d=google.com; s=arc-20160816; b=fBA8+0x8luCsqYC82P4eKF73R2TPzFnHqXm1FbFhdMk4AD4mCnyOq3JtU2EEmvXPj4 046lmWllbBZ/dSxY0RBWvV7GsbUY7TdQMQyOuM1gKy7LvmE6RhOEr8JdBT8yUw/9iz44 f9MrVnzhkb9Q9XX3+pMZX1M1/N8EL+iIYZpJA3PN3KMpXl+b/ReZonXgjXteKFMLGcKR /QocyEl+QqXbUI1TLy2Q48ydLcsuiJ1S+1jwUbelgXctsXkoTEtGDmCwQsgrkSYhLdV9 lcv+Q1iUYnZeTYkFGr4ozNZMIAbgyza1Z4yOac+DvDyaTTE0oCOmOVD2DeN3o6poXjnd oxpg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date:dkim-signature; bh=k424emnjUzEcEougI7OW6CXCCA0P74W2zWVBfp+ccSE=; b=JPfxivsTdAVVez3uYNf0rEMJvL/jPVhzE493La/Ks5pp5HoBkqM3yAnJjknYh2WQaE fxBtux4v7a3MgPpokUyx+qJcv6rFN+XswTNDYa/qMlukpC6a0lUXEhgESDA7VzYzguK7 lD2aYFgCjN3/MNXhH24ogIC3882SGvu7LqtpOFBJqdvsltU1t171LBBGjvNyb4GxmAjm naRHUPz3xZV3HkTcFJ7UdR8SbCjWXIzYbvKZLPwm51r7bpLFXoRtpcN3vdkk6gmBjC5y mw625avPJUDdFV4omlneVH8PRAZozdIivypwEYP2Bzhz5+XB6p+fjLHg6jgtVCRtkwbD C8NA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@alien8.de header.s=dkim header.b=FNVKhXo3; 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; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id i3si5285121ejr.178.2021.05.28.07.44.55; Fri, 28 May 2021 07:45:20 -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; dkim=pass header.i=@alien8.de header.s=dkim header.b=FNVKhXo3; 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; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235535AbhE1Oov (ORCPT + 99 others); Fri, 28 May 2021 10:44:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36252 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235452AbhE1Oom (ORCPT ); Fri, 28 May 2021 10:44:42 -0400 Received: from mail.skyhub.de (mail.skyhub.de [IPv6:2a01:4f8:190:11c2::b:1457]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 24334C061574 for ; Fri, 28 May 2021 07:43:07 -0700 (PDT) Received: from zn.tnic (p200300ec2f0e8e00d6a866fcf7197725.dip0.t-ipconnect.de [IPv6:2003:ec:2f0e:8e00:d6a8:66fc:f719:7725]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 8B3A71EC056D; Fri, 28 May 2021 16:43:05 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1622212985; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=k424emnjUzEcEougI7OW6CXCCA0P74W2zWVBfp+ccSE=; b=FNVKhXo3AZ25ZW9GPi04yomE/czgGdAUvQKwwlSdnP62QYZKtXb4zv8pSPOfB+3lfDUngW xAGcV2x7GTBnSuSnyUZ6dN+UwUIG0Xy+va8hEU/7tXAwLYQmLmI9o9yO3qM22H97Od9kw5 rXgvMIWBHpv53NkOCn0f6LVmJC2HaB8= Date: Fri, 28 May 2021 16:43:04 +0200 From: Borislav Petkov To: "H. Peter Anvin" Cc: Mike Rapoport , Ingo Molnar , Thomas Gleixner , Mike Rapoport , untaintableangel@hotmail.co.uk, x86@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] x86/Kconfig: decrease maximum of X86_RESERVE_LOW to 512K Message-ID: References: <20210526081100.12239-1-rppt@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 27, 2021 at 07:12:51PM -0700, H. Peter Anvin wrote: > BIOSes have been known to clobber more than 64K. They aren't supposed to > clobber any. Yah, the BIOSes and what they're not supposed to do. Like they even care. > 640K is the limit because that is the address of the EGA/VGA frame > buffer. In the words of Bill Gates "640K ought to be enough for anyone." Right. So thoughts on: https://lkml.kernel.org/r/YK%2Bgv0vDfLVD7Sqp@kernel.org ? Time to do what windoze 7 does? -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette