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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E338CC2BA19 for ; Wed, 15 Apr 2020 08:54:15 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A16A9206F9 for ; Wed, 15 Apr 2020 08:54:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A16A9206F9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id E553E8E0003; Wed, 15 Apr 2020 04:54:14 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id DDDFF8E0001; Wed, 15 Apr 2020 04:54:14 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CA4DF8E0003; Wed, 15 Apr 2020 04:54:14 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0144.hostedemail.com [216.40.44.144]) by kanga.kvack.org (Postfix) with ESMTP id AF8DC8E0001 for ; Wed, 15 Apr 2020 04:54:14 -0400 (EDT) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 5B833181AEF1D for ; Wed, 15 Apr 2020 08:54:14 +0000 (UTC) X-FDA: 76709477628.17.brain46_7c3a6dba95f4a X-HE-Tag: brain46_7c3a6dba95f4a X-Filterd-Recvd-Size: 2391 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by imf27.hostedemail.com (Postfix) with ESMTP for ; Wed, 15 Apr 2020 08:54:13 +0000 (UTC) IronPort-SDR: 2RsYYRPdVtMdjqZyE76WFT1rQcxULgBZzXYKqvTe6AgHdt7waIpGFDxpEYu0SsuAC2uj/szjJj LVytDxdx28KA== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Apr 2020 01:54:11 -0700 IronPort-SDR: O7cjpUfFjgMpL7zI0bfxzytfapVd/xUtrDDlSDbMRWYfsMOTsPZkKP5VmCR4FSsG8ZzbzYqdaY ZjVyver8c2pA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.72,386,1580803200"; d="scan'208";a="453855992" Received: from yhuang-dev.sh.intel.com (HELO yhuang-dev) ([10.239.159.23]) by fmsmga005.fm.intel.com with ESMTP; 15 Apr 2020 01:54:09 -0700 From: "Huang\, Ying" To: Qian Cai Cc: Linux-MM , LKML , Minchan Kim , Hugh Dickins , "Andrew Morton" Subject: Re: linux-next: not-present page at swap_vma_readahead() References: <874ktl1p7y.fsf@yhuang-dev.intel.com> Date: Wed, 15 Apr 2020 16:54:08 +0800 In-Reply-To: (Qian Cai's message of "Tue, 14 Apr 2020 22:12:55 -0400") Message-ID: <875ze1yvrj.fsf@yhuang-dev.intel.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable 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: Qian Cai writes: >> On Apr 14, 2020, at 10:01 PM, Huang, Ying wrote= : >>=20 >> Is it possible to bisect this? > > Yes, I=E2=80=99ll need to find a quick reproducer first by analyzing th= e fuzzer=E2=80=99s last logs. Can you share the reproducer to me when it's available? Or the command line you used to reproduce it now? >>=20 >> Because the crash point is identified, it may be helpful to collect an= d >> analyze the status of the faulting page table and readahead ptes. But= I >> am not familiar with the ARM64 architecture. So I cannot help much >> here. > > It happens for x86 as well where the trace is in the first email of thi= s thread. Got it! Thanks! Best Regards, Huang, Ying