From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f200.google.com (mail-io0-f200.google.com [209.85.223.200]) by kanga.kvack.org (Postfix) with ESMTP id A28786B025E for ; Wed, 1 Nov 2017 15:05:46 -0400 (EDT) Received: by mail-io0-f200.google.com with SMTP id 97so9949156iok.19 for ; Wed, 01 Nov 2017 12:05:46 -0700 (PDT) Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41]) by mx.google.com with SMTPS id h99sor655269ioi.200.2017.11.01.12.05.45 for (Google Transport Security); Wed, 01 Nov 2017 12:05:45 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <5005a38e-4dbf-d302-9a82-97c92d0f8f07@linux.intel.com> References: <20171031223146.6B47C861@viggo.jf.intel.com> <9e45a167-3528-8f93-80bf-c333ae6acb71@linux.intel.com> <8bacac66-7d3e-b15d-a73b-92c55c0b1908@linux.intel.com> <5005a38e-4dbf-d302-9a82-97c92d0f8f07@linux.intel.com> From: Linus Torvalds Date: Wed, 1 Nov 2017 12:05:44 -0700 Message-ID: Subject: Re: [PATCH 00/23] KAISER: unmap most of the kernel from userspace page tables Content-Type: text/plain; charset="UTF-8" Sender: owner-linux-mm@kvack.org List-ID: To: Dave Hansen Cc: Andy Lutomirski , Linux Kernel Mailing List , linux-mm , Kees Cook , Hugh Dickins On Wed, Nov 1, 2017 at 11:46 AM, Dave Hansen wrote: > > The vmalloc()'d stacks definitely need the page table walk. Ugh, yes. Nasty. Andy at some point mentioned a per-cpu initial stack trampoline thing for his exception patches, but I'm not sure he actually ever did that. Andy? Linus -- 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