From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr0-f200.google.com (mail-wr0-f200.google.com [209.85.128.200]) by kanga.kvack.org (Postfix) with ESMTP id C5BAB280286 for ; Fri, 10 Nov 2017 04:52:59 -0500 (EST) Received: by mail-wr0-f200.google.com with SMTP id j15so4720098wre.15 for ; Fri, 10 Nov 2017 01:52:59 -0800 (PST) Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41]) by mx.google.com with SMTPS id x14sor5716626edd.14.2017.11.10.01.52.58 for (Google Transport Security); Fri, 10 Nov 2017 01:52:58 -0800 (PST) Date: Fri, 10 Nov 2017 12:52:56 +0300 From: "Kirill A. Shutemov" Subject: Re: [PATCH 3/4] x86/boot/compressed/64: Introduce place_trampoline() Message-ID: <20171110095256.vmndegdixd5keyqo@node.shutemov.name> References: <20171101115503.18358-1-kirill.shutemov@linux.intel.com> <20171101115503.18358-4-kirill.shutemov@linux.intel.com> <20171110091453.6pk5lotvom2cf4mv@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20171110091453.6pk5lotvom2cf4mv@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: Ingo Molnar Cc: "Kirill A. Shutemov" , Ingo Molnar , Linus Torvalds , x86@kernel.org, Thomas Gleixner , "H. Peter Anvin" , Andy Lutomirski , Cyrill Gorcunov , Borislav Petkov , Andi Kleen , linux-mm@kvack.org, linux-kernel@vger.kernel.org On Fri, Nov 10, 2017 at 10:14:53AM +0100, Ingo Molnar wrote: > I'm wondering, how did you test it if no current bootloader puts the kernel to > above addresses of 4G? I didn't test it directly. I've checked with debugger that there's no memory accesses above 1M between disabling paging in the trampoline and returning back from trampoline to the main kernel image code. -- Kirill A. Shutemov -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org