From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AG47ELtrOh9o3CbTesPmuptElWwce+1x7XtF+HaRGuT0t9P8WVBQrrnEPNrPxMxleUjNwvNj8qWz ARC-Seal: i=1; a=rsa-sha256; t=1521140679; cv=none; d=google.com; s=arc-20160816; b=k/30o2oCufTT/M6NwoPV7iMJYsC1JZ78OlySUlkDKX3BVOxW4JXNu2YH7vRWjpm8SO 6Bzez7vd8LG2JwyMO1KAWNcLbdWJMU9nI5daD3aGPSGZSNhR2Xd8nKHEPQaST8H6YEL4 4zkA9SMDfTX6engg3U517Hi3XGGz7Zkxp4RhugmQB3/HnfA4aRa07TBoxtUPLqVIs1V3 K3RenfAR758cj97eKZ02fovHOiJBeP98Q9N+lvWoB5y0imIHOzW1wWrdrefxbzZi8mKT aU+t380SFp5ko/AsjxOozVKD0kwkMtNcH1zp7G6MIviq5KYqM+jwSH606NnSIh10lxfY zZnA== 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=Vems+Ih1SlkAxVbm0yhEdz5hGOowLNBFtQ0k5lQl+xA=; b=ueRJzUujoMrq76nXA+z0DyYaUaTKJIVNIpvHt61vyqjYsJYN5CLDdTWnzHp6kjMbmK u5DB1EhumIXJ4Hbsq6KdFymK31roOhEBMMmdCm7S/iQabaH+I4j4EIwZcnFa9x4QK5Pf mj0zKsjvz1CWq4J1AD3Ks71W70PH+RXQ4+nY/G0TWSnhWc5GXesLb84X4goORWzm+Iq4 /Fp+v/HoMJHowni2rZJ6orm1He5s/GfSBtQ0l+3W+zI2W2u8zMZRwRh3K6AoIzuRkGXg xYr81xbJgitG4+NEWzDoDVQOFtA2xYueRSFMWOP9K7t3ErprwRhgYHdltjigVz6Z6INk zGJA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@oracle.com header.s=corp-2017-10-26 header.b=NUbppXls; spf=pass (google.com: domain of pasha.tatashin@oracle.com designates 141.146.126.78 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=NUbppXls; spf=pass (google.com: domain of pasha.tatashin@oracle.com designates 141.146.126.78 as permitted sender) smtp.mailfrom=pasha.tatashin@oracle.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=oracle.com 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 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1591143417186287050?= X-GMAIL-MSGID: =?utf-8?q?1595031609050794641?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: > > 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