From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C1BF0C43387 for ; Mon, 14 Jan 2019 17:42:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9320E20659 for ; Mon, 14 Jan 2019 17:42:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726773AbfANRmY (ORCPT ); Mon, 14 Jan 2019 12:42:24 -0500 Received: from mout.gmx.net ([212.227.15.18]:56327 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726559AbfANRmX (ORCPT ); Mon, 14 Jan 2019 12:42:23 -0500 Received: from homer.simpson.net ([212.114.172.8]) by mail.gmx.com (mrgmx002 [212.227.17.190]) with ESMTPSA (Nemesis) id 0MY7dI-1gnTwH3L96-00UsFd; Mon, 14 Jan 2019 18:42:17 +0100 Message-ID: <1547487736.31585.21.camel@gmx.de> Subject: Re: 5.0-rc1 KVM inspired "BUG: Bad page state in process" spew From: Mike Galbraith To: Sean Christopherson Cc: Adam Borowski , kvm , lkml Date: Mon, 14 Jan 2019 18:42:16 +0100 In-Reply-To: <20190114154619.GA5141@linux.intel.com> References: <1547012338.4926.11.camel@gmx.de> <20190109144257.erwh52326ucgc5tw@angband.pl> <1547046196.31155.1.camel@gmx.de> <20190109192637.GA1697@linux.intel.com> <1547275382.26908.7.camel@gmx.de> <20190114154619.GA5141@linux.intel.com> Content-Type: text/plain; charset="ISO-8859-15" X-Mailer: Evolution 3.26.6 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:epGwAL5vNPXqQI0wAcuSFlcjK8n144qSigZrMij1FRHwSu/ezK1 nuaqxpYL8Dn+lOldBUuat9fgZD2vmkkNSsJD8m0WuJ7ybm6l8LnjqafowYRqU2gLNl+ITcq GWBI9dJlwC4Xi4kBYOfWTUw/9fKQX1zt9s4sjzDvVFLz7pnrp0n7/Mavyo3NpE9vUdd+0jj jA5KilPVtqBZcw/tjYvmQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:FmiQxBm2wZ8=:4wVPuO/9PoQc+KE4ZFPK/W a1t22g2qBD77BcUoS4h45EfBRMJnOUIGDOkUgAP4h12U+c/LA1lYX2N2dCWkh0dlAMG4dnMrp lCcZKPBUG2JPMc6ELTLIT8ahDpPkwnbTNfBcng2gLIhsNQgcO2tJX7vz67Zk9Tj0qJkgKp4JG wqBCXT1cJx0nB8PlrbPuJwtcFW0+2my5Oklmp5OsprsbY2dNTMX7xhcTKocpHqMEYUGorlawz WxVJU4NKzwtnIUPSLS/BXChHGaxFEPNtxnOHaOlgs7EAdXJCVHVfhgh3tIN6V1TV/hjySulJm DypaPkOKYXsSmRpLYGMtdlbwSLDv5WE1/XirqaJ6znyX69cVUyhY8jlw8ZpEedaTCZZQNRVMx IlJbcy69cf0ckyAUwHUZQt27cgIgnbd5knyCJlMOLkZTK5gnjeKJK6JCEQlqkdOAEAIS4Y0B2 O65JLmz2ADV3m5GUSd3GV6qfA31rXFrK27tbjV9VaERCEwY7/28eNfahOCV2XQjJEbrgW9iF4 8rKARjEjPlBh3oqvEmp3fNSrasIzbr6OpBSfPu492OzT6F2suH8OwaF2wnAfsFLWDXnqydfCe oPPmelnmsUMAayYBYNttV1x8Csy7c/JFmY/bCwhlEGKrQrvg7BpTOQTEK7+4oht6AJJr25e/9 lwpa+yecHoz0JsN3+We34VggZ/EMDmMH917pWaEdvGT0sgISphRcYX/8cMEcsa4bJ7xQ3wfWw kcNJAhcywUgeLPZzohVwuj9IdSpDq8J8lpkcMAR9GfgFxUMOcJO2GSdP1OdVHYzcUEsfHeMgf eD70hxytBW4ZL8NkmY+rifismS5gnMJ6T7n7OlS9Grgpz1yFuenuwJVk7oRAGWCcZ5wOMPRfc vXsSTmAd5XabaNF0zhUuj4C89DpAS3yPsTTISCzColLx/CsAiFlqVeDSM6cIKE Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2019-01-14 at 07:46 -0800, Sean Christopherson wrote: > On Sat, Jan 12, 2019 at 07:43:02AM +0100, Mike Galbraith wrote: > > On Wed, 2019-01-09 at 11:26 -0800, Sean Christopherson wrote: > > > > > > I'll try to bisect. > > > > Good luck with that. I gave it a go, but that apparently invalidated > > the warrantee of my vm image :) > > This is fixed in v5.0-rc2 by commit ba422731316d ("mm/mmu_notifier: > mm/rmap.c: Fix a mmu_notifier range bug in try_to_unmap_one"). Good to hear. > Nested VMs are great for bisecting KVM issues :) I tried nesting dolls (to speed bisection.. hah!), but couldn't reliable trigger the problem with my reproducer. Even if it had, nested VMs are pretty cool, but not the _least bit_ fast :) -Mike