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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 C4B85C64E90 for ; Tue, 24 Nov 2020 09:59:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 804B02076B for ; Tue, 24 Nov 2020 09:59:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=bytedance-com.20150623.gappssmtp.com header.i=@bytedance-com.20150623.gappssmtp.com header.b="R/NFgWFz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731766AbgKXJ6t (ORCPT ); Tue, 24 Nov 2020 04:58:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57432 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731748AbgKXJ6s (ORCPT ); Tue, 24 Nov 2020 04:58:48 -0500 Received: from mail-pf1-x443.google.com (mail-pf1-x443.google.com [IPv6:2607:f8b0:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7137AC0617A6 for ; Tue, 24 Nov 2020 01:58:48 -0800 (PST) Received: by mail-pf1-x443.google.com with SMTP id 131so17994388pfb.9 for ; Tue, 24 Nov 2020 01:58:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=RFw3IJ+e2PheHYuR5pwkJRvmAhprgLu2/OHbj9OxvOs=; b=R/NFgWFzv5XD8+fMmy9hSPore6Nhp1q1lz+iTh/Z6t/bPrllx4dpov59KYoAon2lNA GBpERZR/JZMY3ulmkYQpKDP8DV953PQ3RZzUQxKM4mnyWNwRhDa1wb4snI4zBh2wr5Kb oXkrMON3RrVLHJTImt44dHhTRUluYGutuVa+Os1DRIMMBtTcn1CMLLEZ94p2kvJTScoi /oK4DbQV2PgqhlLFxSIpN6IZAYBXesDQpPwdvfStSi3uUNLJyrQfB+zmcM3hkx4A7BYj ZK6OtqPE/foVctZ5CI9SefAoHhTozBrksQuotfIRLF6NPlQ4HBdzxuvEFbwwoy4rwUfi M9yA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=RFw3IJ+e2PheHYuR5pwkJRvmAhprgLu2/OHbj9OxvOs=; b=VnKTXR/ioF1Xs73j06b7SWNu0YBBytuU6vuWj5K81gcgeJ+j8TZhPoVEh74tnsKROS kaw3hjHk0a/qHBeSy0v6Zs/5eGDNvCRPvw8jKbvVqfYbtgkaDy9gRVavfxBWlaLuIkXe xj7Y1u57x3k9Uc1vk0BVVrJXv5udJpyPlFbQErvmrqi6MZWiRcIDHWjws/ts9HL0qjl8 +CpSed9FHLytDWhLq81cQL0KfE2TKLzk3GkRTt1h3OuSMlYV7BtWM2nSaFGqqrSVXxMr 7NdiV8Gr+5hI07sL9wIHFT7KYXqgjFyIqIj4TVA0K6Oe28ZwDj8Jccs/+LuVQkO8yoyu SOvQ== X-Gm-Message-State: AOAM5307WclYN1EC2cfBU96mNmrtijVhbpmWtR9BC+149bJdX2CUAaZF EUTV8Q44uYBuCFc2bp9CNcQuIw== X-Google-Smtp-Source: ABdhPJzdxw87RN1KSfcNqb2JmA6MNZy/cqHyN2dAAW7ioN9KAQtWf+p2mboNDrApUqfrr5RM9+njBA== X-Received: by 2002:a62:78d3:0:b029:198:ad8:7d05 with SMTP id t202-20020a6278d30000b02901980ad87d05mr3424298pfc.18.1606211928001; Tue, 24 Nov 2020 01:58:48 -0800 (PST) Received: from localhost.localdomain ([103.136.220.120]) by smtp.gmail.com with ESMTPSA id t20sm2424562pjg.25.2020.11.24.01.58.38 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 24 Nov 2020 01:58:47 -0800 (PST) From: Muchun Song To: corbet@lwn.net, mike.kravetz@oracle.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, viro@zeniv.linux.org.uk, akpm@linux-foundation.org, paulmck@kernel.org, mchehab+huawei@kernel.org, pawan.kumar.gupta@linux.intel.com, rdunlap@infradead.org, oneukum@suse.com, anshuman.khandual@arm.com, jroedel@suse.de, almasrymina@google.com, rientjes@google.com, willy@infradead.org, osalvador@suse.de, mhocko@suse.com, song.bao.hua@hisilicon.com Cc: duanxiongchun@bytedance.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Muchun Song Subject: [PATCH v6 12/16] mm/hugetlb: Set the PageHWPoison to the raw error page Date: Tue, 24 Nov 2020 17:52:55 +0800 Message-Id: <20201124095259.58755-13-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20201124095259.58755-1-songmuchun@bytedance.com> References: <20201124095259.58755-1-songmuchun@bytedance.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Because we reuse the first tail vmemmap page frame and remap it with read-only, we cannot set the PageHWPosion on a tail page. So we can use the head[4].mapping to record the real error page index and set the raw error page PageHWPoison later. Signed-off-by: Muchun Song --- mm/hugetlb.c | 11 +++-------- mm/hugetlb_vmemmap.h | 39 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+), 8 deletions(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 3fafa39fcac6..ade20954eb81 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1383,6 +1383,7 @@ static void __free_hugepage(struct hstate *h, struct page *page) int i; alloc_huge_page_vmemmap(h, page); + subpage_hwpoison_deliver(page); for (i = 0; i < pages_per_huge_page(h); i++) { page[i].flags &= ~(1 << PG_locked | 1 << PG_error | @@ -1930,14 +1931,8 @@ int dissolve_free_huge_page(struct page *page) int nid = page_to_nid(head); if (h->free_huge_pages - h->resv_huge_pages == 0) goto out; - /* - * Move PageHWPoison flag from head page to the raw error page, - * which makes any subpages rather than the error page reusable. - */ - if (PageHWPoison(head) && page != head) { - SetPageHWPoison(page); - ClearPageHWPoison(head); - } + + set_subpage_hwpoison(head, page); list_del(&head->lru); h->free_huge_pages--; h->free_huge_pages_node[nid]--; diff --git a/mm/hugetlb_vmemmap.h b/mm/hugetlb_vmemmap.h index 7887095488f4..4bb35d87ae10 100644 --- a/mm/hugetlb_vmemmap.h +++ b/mm/hugetlb_vmemmap.h @@ -15,6 +15,29 @@ void __init hugetlb_vmemmap_init(struct hstate *h); void alloc_huge_page_vmemmap(struct hstate *h, struct page *head); void free_huge_page_vmemmap(struct hstate *h, struct page *head); +static inline void subpage_hwpoison_deliver(struct page *head) +{ + struct page *page = head; + + if (PageHWPoison(head)) + page = head + page_private(head + 4); + + /* + * Move PageHWPoison flag from head page to the raw error page, + * which makes any subpages rather than the error page reusable. + */ + if (page != head) { + SetPageHWPoison(page); + ClearPageHWPoison(head); + } +} + +static inline void set_subpage_hwpoison(struct page *head, struct page *page) +{ + if (PageHWPoison(head)) + set_page_private(head + 4, page - head); +} + static inline unsigned int free_vmemmap_pages_per_hpage(struct hstate *h) { return h->nr_free_vmemmap_pages; @@ -32,6 +55,22 @@ static inline void free_huge_page_vmemmap(struct hstate *h, struct page *head) { } +static inline void subpage_hwpoison_deliver(struct page *head) +{ +} + +static inline void set_subpage_hwpoison(struct page *head, struct page *page) +{ + /* + * Move PageHWPoison flag from head page to the raw error page, + * which makes any subpages rather than the error page reusable. + */ + if (PageHWPoison(head) && page != head) { + SetPageHWPoison(page); + ClearPageHWPoison(head); + } +} + static inline unsigned int free_vmemmap_pages_per_hpage(struct hstate *h) { return 0; -- 2.11.0