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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id A4380C433F5 for ; Mon, 21 Mar 2022 17:28:40 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id C5C926B0071; Mon, 21 Mar 2022 13:28:39 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C0C166B0073; Mon, 21 Mar 2022 13:28:39 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id AD3516B0074; Mon, 21 Mar 2022 13:28:39 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0110.hostedemail.com [216.40.44.110]) by kanga.kvack.org (Postfix) with ESMTP id 9CE276B0071 for ; Mon, 21 Mar 2022 13:28:39 -0400 (EDT) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 56C1C182888CF for ; Mon, 21 Mar 2022 17:28:39 +0000 (UTC) X-FDA: 79269077958.21.2D13E07 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by imf15.hostedemail.com (Postfix) with ESMTP id 4ED4DA0020 for ; Mon, 21 Mar 2022 17:28:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1647883718; x=1679419718; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=rwSMSJL/Qkpsa34OftwjEfWcktSYy7WkC9GOoOaW6LY=; b=nN3No44EUaGW18kzTw8gIBRfGNrhCGruh9NQyasumql9QZRc36Ws4KTw zkzfbsS6rHgSFZ3JMeT77SIaodzqk5fYn/ZmZeJNFwm+cDHZIa7mnKpPL FwJAmsDraLoIPaloIQN1SgpwY8yIY7vhAQYw+KSyW03YJuiRaul5egHe7 NqD3/eAsn0h2aqqFG2Ot2MJNxrqw2zfL6BYRH8isxDe07tdM5+NkO+GjS ZMT9ZR/tEFwwhJiEjv2r0l/SxhmyieAriWz/nwaQyG1MHa70VORKwQ8+K RMS1SifaVKU+T4dHq/yuZYpt7gtMyk5JeKzwNpr+n+6h4rBl5ZVamtylI A==; X-IronPort-AV: E=McAfee;i="6200,9189,10293"; a="239767238" X-IronPort-AV: E=Sophos;i="5.90,199,1643702400"; d="scan'208";a="239767238" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Mar 2022 10:28:27 -0700 X-IronPort-AV: E=Sophos;i="5.90,199,1643702400"; d="scan'208";a="692245748" Received: from agluck-desk3.sc.intel.com ([172.25.222.60]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Mar 2022 10:28:26 -0700 Date: Mon, 21 Mar 2022 10:28:25 -0700 From: "Luck, Tony" To: Matthew Wilcox Cc: linux-mm@kvack.org, shy828301@gmail.com, naoya.horiguchi@nec.com, mike.kravetz@oracle.com, bp@alien8.de, linmiaohe@huawei.com, akpm@linux-foundation.org Subject: Re: unhandlable pages Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: 4ED4DA0020 X-Stat-Signature: o4sb9hp1xh6za3ow4asmeem8o7zoz1t5 X-Rspam-User: Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=nN3No44E; dmarc=pass (policy=none) header.from=intel.com; spf=none (imf15.hostedemail.com: domain of tony.luck@intel.com has no SPF policy when checking 134.134.136.126) smtp.mailfrom=tony.luck@intel.com X-Rspamd-Server: rspam02 X-HE-Tag: 1647883717-754450 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, Mar 21, 2022 at 05:21:05PM +0000, Matthew Wilcox wrote: > On Mon, Mar 21, 2022 at 10:17:29AM -0700, Luck, Tony wrote: > > Validation folks are seeing this on a v5.16 kernel. I don't > > see any changes in v5.17 that look like they address it. > > > > Mar 04 14:05:05 JF5300-07B181T kernel: page:00000000696b0b6a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x195cda44 > > Mar 04 14:05:05 JF5300-07B181T kernel: flags: 0x57ffffc0801000(reserved|hwpoison|node=1|zone=2|lastcpupid=0x1fffff) > > Mar 04 14:05:05 JF5300-07B181T kernel: raw: 0057ffffc0801000 ffff6ea817369108 ffff6ea817369108 0000000000000000 > > Mar 04 14:05:05 JF5300-07B181T kernel: raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 > > Mar 04 14:05:05 JF5300-07B181T kernel: page dumped because: hwpoison: unhandlable page > > Mar 04 14:05:05 JF5300-07B181T kernel: Memory failure: 0x195cda44: recovery action for unknown page: Ignored > > > > Som debugging shows this is an anon page (expected ... that's the > > type of page where the error was injected. They see shake_page() > > called three times, but it doesn't change anything, so the page > > is reported as unhandlable. > > Uhm, that's not PageAnon. page->mapping is NULL, and anon pages have > the bottom bit set with the rest of the page->mapping pointing to its > anon_vma. Why do you think it's an anon page? Sorry. I didn't do that decode ... just copied what was in the internal report. If it isn't anon, then does that page dump give info on what type the page is? -Tony