Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754161AbdIEXJE (ORCPT ); Tue, 5 Sep 2017 19:09:04 -0400 Received: from mail-it0-f41.google.com ([209.85.214.41]:37196 "EHLO mail-it0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753694AbdIEXJC (ORCPT ); Tue, 5 Sep 2017 19:09:02 -0400 X-Google-Smtp-Source: ADKCNb5mFVekhgtpjymbt1+7uwRo+c+/jw/gsszW/47fOlIOQ116wYg6v2kUH0tQMoVEY933487PnWCHCsdk9Sv4b6g= MIME-Version: 1.0 In-Reply-To: References: <20170904093158.k6pg3ytcbotjlhv5@gmail.com> <20170905214046.ishenhbj7jrtoufc@gmail.com> From: Linus Torvalds Date: Tue, 5 Sep 2017 16:09:01 -0700 X-Google-Sender-Auth: j58qORTbvv5sWuv6HZbj0G8r-zY Message-ID: Subject: Re: [GIT PULL] x86/mm changes for v4.14: PCID support, 5-level paging support, Secure Memory Encryption support To: Ingo Molnar Cc: Linux Kernel Mailing List , Thomas Gleixner , "H. Peter Anvin" , Peter Zijlstra , Andrew Morton , Andy Lutomirski , Borislav Petkov Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 603 Lines: 17 On Tue, Sep 5, 2017 at 3:33 PM, Linus Torvalds wrote: > > And one of those 18 is commit 10af6235e0d3 ("x86/mm: Implement PCID > based optimization: try to preserve old TLB entries using PCID"), > which I guess is where the problem might actually start showing up if > it is pcid. Yup, that's what it bisected down to in the end. And then rebooting once more into that kernel, but with "nopcid" on the command line, and it all works. I'll go back to top-of-tree just to verify that 'nopcid' thing there too, but it does seem pretty clear-cut. Linus