From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f72.google.com (mail-pg0-f72.google.com [74.125.83.72]) by kanga.kvack.org (Postfix) with ESMTP id 145F8440874 for ; Thu, 13 Jul 2017 10:17:09 -0400 (EDT) Received: by mail-pg0-f72.google.com with SMTP id g7so59760513pgp.1 for ; Thu, 13 Jul 2017 07:17:09 -0700 (PDT) Received: from EUR01-HE1-obe.outbound.protection.outlook.com (mail-he1eur01on0101.outbound.protection.outlook.com. [104.47.0.101]) by mx.google.com with ESMTPS id g8si4450938plj.549.2017.07.13.07.17.07 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 13 Jul 2017 07:17:08 -0700 (PDT) Subject: Re: KASAN vs. boot-time switching between 4- and 5-level paging References: <20170711103548.mkv5w7dd5gpdenne@node.shutemov.name> <20170711170332.wlaudicepkg35dmm@node.shutemov.name> <20170711190554.zxkpjeg2bt65wtir@black.fi.intel.com> <20939b37-efd8-2d32-0040-3682fff927c2@virtuozzo.com> <20170713135228.vhvpe7mqdcqzpslw@node.shutemov.name> <20170713141528.rwuz5n2p57omq6wi@node.shutemov.name> From: Andrey Ryabinin Message-ID: Date: Thu, 13 Jul 2017 17:19:22 +0300 MIME-Version: 1.0 In-Reply-To: <20170713141528.rwuz5n2p57omq6wi@node.shutemov.name> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: "Kirill A. Shutemov" Cc: "Kirill A. Shutemov" , Andy Lutomirski , Dmitry Vyukov , Alexander Potapenko , Linus Torvalds , Andrew Morton , "x86@kernel.org" , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Andi Kleen , Dave Hansen , linux-arch , "linux-mm@kvack.org" , LKML , kasan-dev On 07/13/2017 05:15 PM, Kirill A. Shutemov wrote: >> >> Hm. I don't see this: >> >> ... >> [ 0.247532] 0xff9e938000000000-0xff9f000000000000 111104G p4d >> [ 0.247733] 0xff9f000000000000-0xffff000000000000 24P pgd >> [ 0.248066] 0xffff000000000000-0xffffff0000000000 255T p4d >> [ 0.248290] ---[ ESPfix Area ]--- >> [ 0.248393] 0xffffff0000000000-0xffffff8000000000 512G p4d >> [ 0.248663] 0xffffff8000000000-0xffffffef00000000 444G pud >> [ 0.248892] ---[ EFI Runtime Services ]--- >> [ 0.248996] 0xffffffef00000000-0xfffffffec0000000 63G pud >> [ 0.249308] 0xfffffffec0000000-0xfffffffefe400000 996M pmd >> ... >> >> Do you have commit "x86/dump_pagetables: Generalize address normalization" >> in your tree? >> Nope. Applied now, it helped. >> https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git/commit/?h=la57/boot-switching/v2&id=13327fec85ffe95d9c8a3f57ba174bf5d5c1fb01 >> >>> As for KASAN, I think it would be better just to make it work faster, >>> the patch below demonstrates the idea. >> >> Okay, let me test this. > > The patch works for me. > > The problem is not exclusive to 5-level paging, so could you prepare and > push proper patch upstream? > Sure, will do -- 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