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 838D0C5519F for ; Fri, 20 Nov 2020 06:49:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2E32722256 for ; Fri, 20 Nov 2020 06:49:01 +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="mVgZ4mHI" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727047AbgKTGsl (ORCPT ); Fri, 20 Nov 2020 01:48:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45320 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726761AbgKTGsf (ORCPT ); Fri, 20 Nov 2020 01:48:35 -0500 Received: from mail-pf1-x441.google.com (mail-pf1-x441.google.com [IPv6:2607:f8b0:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AE594C061A04 for ; Thu, 19 Nov 2020 22:48:35 -0800 (PST) Received: by mail-pf1-x441.google.com with SMTP id y7so6913770pfq.11 for ; Thu, 19 Nov 2020 22:48:35 -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=7YF/BLlniOkOqlOLuNwhoC17uEIWhpvSsCIax+QfC3Y=; b=mVgZ4mHIEX3s8Zda4GGNN1XhpnpwWrK9FhJz4NVGZ5Z0494vBrBobx06xswFqn6/rr 1lV4CwYDyAGLXE9MJI2t4mqIiHFKxstajuTtTufgI/wvjninvZLxP5JZR8DJc/pOTbYq 9YyU7YaNviau0//pkxfy24hNjNdwNuhjaZFTOHWDaOrTzeaqf1+jMT/VI16TCvykK3PY piX4KgJYDj95dbFMDCGIIrnC2P8OSPP391tzjX74bg8YJcFG+kZRoAi0lR/nWInRPjiv IdHeMT/EfNxJVoogxH1Ta+EiWnYxZFHGg6cvzSnZQtnO4ZGVqQAYxxLV9AtigYQBL6Ei YKLQ== 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=7YF/BLlniOkOqlOLuNwhoC17uEIWhpvSsCIax+QfC3Y=; b=tKx/1I0gTJVTJEyr1S4thpCLPXNWJFLwjabHcZ/mSt2Pe46Z1MWiMb7fWSqt2Q4WoX 2IJl8fJ6OWzWQYTdMm5gq6vvUAW0gu2PZn2NbsrvPvC3XEMevt/r31qQZ44agBY3PJO3 fxf5sjqzuKsJaOT4kjgtV0HNuLAHL840yls3Qh7JZrKkV5v4/lYohcHr82HyCD2IDfox JgWBlBfCtcJoY2kmPqC4SWLtDqyeKCrtJWkXIr3/O3guEwdtq5IdOy61cEZqkcrbfaQP wUlB2uAD1JfY71t9FvNgQFiBR3vV52JlWvfAh+Bm0fcVzTuCO7keG0J+P3CjT9j4MQMt 6G0w== X-Gm-Message-State: AOAM533gMl0lQDunYc39udMxhZjFQ00t32cGAMS4Z6lf6XXMMPlgisAe zcFa4aFfAVIo9NZE1s9brnUfOA== X-Google-Smtp-Source: ABdhPJzUxMIedTA7fjy9+8PXQ5X870hMnht0hWNgRLugfp9zuqD73EKTYWSoXGdNOucbnRdCj2YQyw== X-Received: by 2002:aa7:84d0:0:b029:18b:fac7:29b with SMTP id x16-20020aa784d00000b029018bfac7029bmr12420886pfn.29.1605854915274; Thu, 19 Nov 2020 22:48:35 -0800 (PST) Received: from localhost.localdomain ([103.136.221.72]) by smtp.gmail.com with ESMTPSA id 23sm2220278pfx.210.2020.11.19.22.48.26 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 19 Nov 2020 22:48:34 -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 v5 15/21] mm/hugetlb: Set the PageHWPoison to the raw error page Date: Fri, 20 Nov 2020 14:43:19 +0800 Message-Id: <20201120064325.34492-16-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20201120064325.34492-1-songmuchun@bytedance.com> References: <20201120064325.34492-1-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 page, if we set PageHWPosion on a tail page. It indicates that we may set PageHWPoison on a series of pages. 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 055604d07046..b853aacd5c16 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 | @@ -1944,14 +1945,8 @@ 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 779d3cb9333f..65e94436ffff 100644 --- a/mm/hugetlb_vmemmap.h +++ b/mm/hugetlb_vmemmap.h @@ -20,6 +20,29 @@ void __init gather_vmemmap_pgtable_init(struct huge_bootmem_page *m, 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; @@ -56,6 +79,22 @@ 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