Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752551AbdFSXEp (ORCPT ); Mon, 19 Jun 2017 19:04:45 -0400 Received: from mail-pf0-f195.google.com ([209.85.192.195]:36254 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752372AbdFSXEo (ORCPT ); Mon, 19 Jun 2017 19:04:44 -0400 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Subject: Re: [PATCH v2 10/10] x86/mm: Try to preserve old TLB entries using PCID From: Nadav Amit In-Reply-To: <29636D5E-53D4-47B1-8F72-8DD0FAE58A60@gmail.com> Date: Mon, 19 Jun 2017 16:04:41 -0700 Cc: X86 ML , "linux-kernel@vger.kernel.org" , Borislav Petkov , Linus Torvalds , Andrew Morton , Mel Gorman , "linux-mm@kvack.org" , Rik van Riel , Dave Hansen , Arjan van de Ven , Peter Zijlstra Message-Id: <63A46FD8-1F25-4CE2-8C0C-6E57ECB9470C@gmail.com> References: <35264bd304c93f6d3cfff2329e3e01b084598ea1.1497415951.git.luto@kernel.org> <740B1D51-B801-48C9-A4C9-F31B34A09AEF@gmail.com> <29636D5E-53D4-47B1-8F72-8DD0FAE58A60@gmail.com> To: Andy Lutomirski X-Mailer: Apple Mail (2.3273) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mail.home.local id v5JN4pkx028157 Content-Length: 315 Lines: 10 Nadav Amit wrote: >> > Just to clarify: I asked since I don’t understand how the interaction with > PCID-unaware CR3 users go. Specifically, IIUC, arch_efi_call_virt_teardown() > can reload CR3 with an old PCID value. No? Please ignore this email. I realized it is not a problem. Nadav