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=-6.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 04BC5C48BCF for ; Wed, 9 Jun 2021 02:23:24 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 4B60B6128A for ; Wed, 9 Jun 2021 02:23:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4B60B6128A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 69EE56B006C; Tue, 8 Jun 2021 22:23:22 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 63BB56B006E; Tue, 8 Jun 2021 22:23:22 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5044D6B0070; Tue, 8 Jun 2021 22:23:22 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0077.hostedemail.com [216.40.44.77]) by kanga.kvack.org (Postfix) with ESMTP id 1F1576B006C for ; Tue, 8 Jun 2021 22:23:22 -0400 (EDT) Received: from smtpin10.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id ADE60A2CA for ; Wed, 9 Jun 2021 02:23:21 +0000 (UTC) X-FDA: 78232588602.10.14091D3 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by imf29.hostedemail.com (Postfix) with ESMTP id 581EAF2 for ; Wed, 9 Jun 2021 02:23:15 +0000 (UTC) Received: from dggemv711-chm.china.huawei.com (unknown [172.30.72.55]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4G09n73zMdzYrnF; Wed, 9 Jun 2021 10:20:27 +0800 (CST) Received: from dggema753-chm.china.huawei.com (10.1.198.195) by dggemv711-chm.china.huawei.com (10.1.198.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2176.2; Wed, 9 Jun 2021 10:23:17 +0800 Received: from huawei.com (10.174.179.206) by dggema753-chm.china.huawei.com (10.1.198.195) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Wed, 9 Jun 2021 10:23:16 +0800 From: wangbin To: CC: , , , , , , Subject: Re: Re: [PATCH] mm: hugetlbfs: add hwcrp_hugepages to record memory failure on hugetlbfs Date: Wed, 9 Jun 2021 10:23:11 +0800 Message-ID: <20210609022311.2102-1-wangbin224@huawei.com> X-Mailer: git-send-email 2.29.2.windows.3 In-Reply-To: <20210608091352.GA943097@hori.linux.bs1.fc.nec.co.jp> References: <20210608091352.GA943097@hori.linux.bs1.fc.nec.co.jp> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.174.179.206] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To dggema753-chm.china.huawei.com (10.1.198.195) X-CFilter-Loop: Reflected Authentication-Results: imf29.hostedemail.com; dkim=none; spf=pass (imf29.hostedemail.com: domain of wangbin224@huawei.com designates 45.249.212.187 as permitted sender) smtp.mailfrom=wangbin224@huawei.com; dmarc=pass (policy=none) header.from=huawei.com X-Stat-Signature: oxanweau5x8k8awuxrsrp5qx1bwpbya3 X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 581EAF2 X-HE-Tag: 1623205395-72444 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: > If you can use root privilege in your use-case, an easy way to get the > number of corrupted hugepages is to use page-types.c (which reads > /proc/kpageflags) like below: >=20 > $ page-types -b huge,hwpoison=3Dhuge,hwpoison > flags page-count MB symbolic-flags = long-symbolic-flags > 0x00000000000a8000 1 0 _______________H_G_X__= _____________________ compound_head,huge,hwpoison > total 1 0 >=20 > But I guess that many usecases do not permit access to this interface, > where some new accounting interface for corrupted hugepages could be > helpful as you suggest. Thanks for your suggestion very much. This approach is helpful to me. But as you say, root privilege is not permitted in most cases. And I also want to know the number of corrupted hugepages per node. -- Bin Wang