From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AIpwx4/k256cnfhpRDAGXTbzENBrb6DgSr12KpISwEhrcy0SiSgdOq0ZzN0gQZox1ZE+gygHChEb ARC-Seal: i=1; a=rsa-sha256; t=1522808278; cv=none; d=google.com; s=arc-20160816; b=bzhhL1dYtI1latEL1tblG83s87zQH26NDYvE5TxmH4r9UYOdthh3BCuVlbu3ug3pzr nbTMCnZqaSKdLAwZAlY0oPxyfKisp37utmFr+aTwaYx3q++kRWUM1CsgjkY1tA7k0lG3 FQ/Rvw8jKtRnZ4hkyjLLhrlgQSjP/Kq4w0eRScqhn3dT+uFgxFlIePDkkdEej+f1Na7H X4n7qjDvHB8o1fLiBIaa4nD2GyuBhM29kb7ZovNwR33+TdJIzldMXQsyP159i6OZFU7j SiyIbD6Gal05WHz3IW1GGm0hZ6SsSNBtCdiiv8IJnxLW3oAuOhx/HL6PlUCn2XZsZP2K IL0w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=user-agent:in-reply-to:content-disposition:mime-version:references :message-id:subject:cc:to:from:date:dkim-signature :arc-authentication-results; bh=DJH9KQ1N+QUPysEiNwEyftGI1jYYk7862zjxIICd+pc=; b=rzb9zPYtggu04tYV7Ke6Av+5YyyFG9nW4V94rdhMlr0ldfsplsVDl+pqh+9+KWOymF CUrDbkovBoMgRZZoFs8h5s2K9MfhVFWuZJw4WJ8qZ+UFOWGMiGN96nwW6Q9O9PtFY+/Z 8+clBYgtP88v6YEnUGzcrZ6BSdyyAkid52JLOOC6b/X+3tewL0MqCgjeojDiHkF+poBI DRKBMwP5Xs02j9HqMTYqSyvxLBpyQXkmcFOJfnvYnBnMSUekIvu36EsGmgwbQ0649okF /tKotU3242GEOrJMsRWJoZL4V/cHJjrdx2KUr8o3IKFfX4ljO/JC3u/DpAIwRiWLlJMh h1Qg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@oracle.com header.s=corp-2017-10-26 header.b=WFLlWXqP; spf=pass (google.com: domain of pasha.tatashin@oracle.com designates 156.151.31.85 as permitted sender) smtp.mailfrom=pasha.tatashin@oracle.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=oracle.com Authentication-Results: mx.google.com; dkim=pass header.i=@oracle.com header.s=corp-2017-10-26 header.b=WFLlWXqP; spf=pass (google.com: domain of pasha.tatashin@oracle.com designates 156.151.31.85 as permitted sender) smtp.mailfrom=pasha.tatashin@oracle.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=oracle.com Date: Tue, 3 Apr 2018 22:17:46 -0400 From: Pavel Tatashin 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" 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> User-Agent: NeoMutt/20180323 X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8852 signatures=668697 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1711220000 definitions=main-1804040020 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1591143417186287050?= X-GMAIL-MSGID: =?utf-8?q?1596780213750089873?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 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