From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ua0-f199.google.com (mail-ua0-f199.google.com [209.85.217.199]) by kanga.kvack.org (Postfix) with ESMTP id 2BF496B0005 for ; Tue, 3 Apr 2018 22:17:55 -0400 (EDT) Received: by mail-ua0-f199.google.com with SMTP id a5so9699699uak.17 for ; Tue, 03 Apr 2018 19:17:55 -0700 (PDT) Received: from userp2120.oracle.com (userp2120.oracle.com. [156.151.31.85]) by mx.google.com with ESMTPS id y184si1720192vka.35.2018.04.03.19.17.53 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 03 Apr 2018 19:17:53 -0700 (PDT) Date: Tue, 3 Apr 2018 22:17:46 -0400 From: Pavel Tatashin Subject: Re: [PATCH v2 1/2] mm: uninitialized struct page poisoning sanity checking Message-ID: <20180404021746.m77czxidkaumkses@xakep.localdomain> References: <20180131210300.22963-1-pasha.tatashin@oracle.com> <20180131210300.22963-2-pasha.tatashin@oracle.com> <20180313234333.j3i43yxeawx5d67x@sasha-lappy> <20180314005350.6xdda2uqzuy4n3o6@sasha-lappy> <20180315190430.o3vs7uxlafzdwgzd@xakep.localdomain> <20180315204312.n7p4zzrftgg6m7zw@sasha-lappy> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180315204312.n7p4zzrftgg6m7zw@sasha-lappy> Sender: owner-linux-mm@kvack.org List-ID: To: Sasha Levin Cc: "steven.sistare@oracle.com" , "daniel.m.jordan@oracle.com" , "akpm@linux-foundation.org" , "mgorman@techsingularity.net" , "mhocko@suse.com" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "gregkh@linuxfoundation.org" , "vbabka@suse.cz" , "bharata@linux.vnet.ibm.com" On 18-03-15 20:43:14, Sasha Levin wrote: > On Thu, Mar 15, 2018 at 03:04:30PM -0400, Pavel Tatashin wrote: > >> > >> Attached the config. It just happens on boot. > > > >Hi Sasha, > > > >I have tried unsuccessfully to reproduce the bug in qemu with 20G RAM, > >and 8 CPUs. > > > >Patch "mm: uninitialized struct page poisoning sanity" should be improved > >to make dump_page() to detect poisoned struct page, and simply print hex > >in such case. I will send an updated patch later. > > > >How do you run this on Microsoft hypervisor? Do I need Windows 10 for > >that? > > Booting a Linux VM on Azure would be the easiest, and free too :) Hi Sasha, I have registered on Azure's portal, and created a VM with 4 CPUs and 16G of RAM. However, I still was not able to reproduce the boot bug you found. Could you please try an updated patch that I sent out today, the panic message should improve: https://lkml.org/lkml/2018/4/3/583 Thank you, Pasha