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[209.132.180.67]) by mx.google.com with ESMTP id v20-v6si4312002plo.199.2018.03.15.12.07.34; Thu, 15 Mar 2018 12:07:50 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@oracle.com header.s=corp-2017-10-26 header.b=NUbppXls; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=oracle.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752854AbeCOTEw (ORCPT + 99 others); Thu, 15 Mar 2018 15:04:52 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:54198 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752284AbeCOTEu (ORCPT ); Thu, 15 Mar 2018 15:04:50 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w2FJ3BEa022049; Thu, 15 Mar 2018 19:04:35 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=corp-2017-10-26; bh=Vems+Ih1SlkAxVbm0yhEdz5hGOowLNBFtQ0k5lQl+xA=; b=NUbppXlsrff1mLLkzp0FSv6ENZNlfuw6PUSR0LCXqFsJ0jZCVtmMNrTK8cHp63YIMRP5 84T/x22HYo5PSY/YY+cuR7JbJ0sFK5tahO9B0n0B7bpWgi3DRUTYqAjm5kp0xTugdCr7 +3SHdcQSg6ESgbGDjBM9zD1rbsRWIdsRH9KqZo1P8OkVf0U1gpC67/YzPdza9XoclaxM FZpzfnK42m/EfiycNqLRTZMo4p8mpp7eOUFnzA9g/UjkbcSP+Cdx8LwC7tCz8O2A2MCW Mt7GncKLmFqvSR8YquCBSLqrOUZXWuMygkVVYbTbPV2q6XGu5dblFxdUXrCvBi4TnPRu mg== Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by aserp2120.oracle.com with ESMTP id 2gqxn6g074-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 15 Mar 2018 19:04:35 +0000 Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w2FJ4XT9007163 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 15 Mar 2018 19:04:34 GMT Received: from abhmp0012.oracle.com (abhmp0012.oracle.com [141.146.116.18]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id w2FJ4Wnp001085; Thu, 15 Mar 2018 19:04:32 GMT Received: from xakep.localdomain (/98.216.35.41) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 15 Mar 2018 12:04:32 -0700 Date: Thu, 15 Mar 2018 15:04:30 -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: <20180315190430.o3vs7uxlafzdwgzd@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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180314005350.6xdda2uqzuy4n3o6@sasha-lappy> User-Agent: NeoMutt/20180223 X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8832 signatures=668690 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 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-1803150169 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > > 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? BTW, I am going to be on vacation for the next two week (going to Israel), so I may not be able to response quickly. Thank you, Pasha