Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751476AbeAECXB (ORCPT + 1 other); Thu, 4 Jan 2018 21:23:01 -0500 Received: from mail-it0-f52.google.com ([209.85.214.52]:44363 "EHLO mail-it0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751166AbeAECW7 (ORCPT ); Thu, 4 Jan 2018 21:22:59 -0500 X-Google-Smtp-Source: ACJfBovv4IZkIiDYSmhIRVE4uZCYDXrfjmfGX5P6+J4bwlniTdyXQyWNmtOUarRVDs2zf22jQNMd4z3J4Erx7Zpn28c= MIME-Version: 1.0 In-Reply-To: References: From: Linus Torvalds Date: Thu, 4 Jan 2018 18:22:58 -0800 X-Google-Sender-Auth: Imp-MWkJoopIuuQ9z5FMAZncnqU Message-ID: Subject: Re: 4.15-rc6+ hang To: Tom Hromatka Cc: Linux Kernel Mailing List , Dhaval Giani , Greg Kroah-Hartman , Peter Zijlstra , Ingo Molnar , Thomas Gleixner Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: On Thu, Jan 4, 2018 at 5:36 PM, Tom Hromatka wrote: > I am seeing a hang running kernel 4.15-rc6+ on a vanilla VirtualBox VM. > (VirtualBox version 5.0.40) Any chance of bisecting this? I could imagine that all the stuff we now do for page table isolation might confuse the VM. > When I boot this kernel, it hangs and falls back into dracut. Here's > the boot log immediately prior to the hang: So a few questions: (a) does it work with "pti=no" on the kernel command line (b) what was the last kernel that worked? Is 4.15-rc5 fine, for example? > [ 0.000000] ------------[ cut here ]------------ > [ 0.000000] XSAVE consistency problem, dumping leaves I think this is a vbox issue, with virtualbox not exposing all the xsave state, so that when the kernel adds up the xsave areas, the end result doesn't match what the total size is reported to be. I suspect you _should_ have gotten that before too, independently of the hang. Linus