From patchwork Thu Feb 25 13:21:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muchun Song X-Patchwork-Id: 12104125 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=ham 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 D8714C433DB for ; Thu, 25 Feb 2021 13:27:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8E6D664EF5 for ; Thu, 25 Feb 2021 13:27:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232177AbhBYN1J (ORCPT ); Thu, 25 Feb 2021 08:27:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39620 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229845AbhBYNZO (ORCPT ); Thu, 25 Feb 2021 08:25:14 -0500 Received: from mail-pf1-x42d.google.com (mail-pf1-x42d.google.com [IPv6:2607:f8b0:4864:20::42d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6E89EC061788 for ; Thu, 25 Feb 2021 05:24:30 -0800 (PST) Received: by mail-pf1-x42d.google.com with SMTP id v200so3616862pfc.0 for ; Thu, 25 Feb 2021 05:24:30 -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=vCS+yi4FQEcYV3QuXltaFkVQ0yQluHl+1qNlK3wFCCA=; b=erxLSBf5h20SirJAItdp/RRKXmAFqy0tCXbBdqAdA1U4hLCBOEzCEKjSZUpkJkRFPp bm+g0tnaeGA1+Jm0k4341aeyl7XuVIcRkAHW4vtwvzdM7sp+jJ/BGlmouwv3+1dAjnwq 69c1nDI4DuNRwtiOUEIcgWSaFp+W/m/EHBJuKX72VYwRd3fcyWvsyBOsZnXpGPiYYRTJ W/jZDpqNtACw2kQBFADhBoEIqWAsdsuRnm4EibYa7ibDqNaD4MpsoekBJb+9r+4fB3WZ 9IWjYRPvCJWaf/aY+sMr8wGweLc/6FvFqfIcecfxe9TwSuOU/MI1nRN8n+5UKHxeGz5t dsiQ== 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=vCS+yi4FQEcYV3QuXltaFkVQ0yQluHl+1qNlK3wFCCA=; b=D5XEuENtIz9UjX47LimZqkDDCuCLhIaF3i5t65Pm6TQGBzS0VFhAvpOYLzwpnkCXi0 V0bniHDpZmF8tF/sM2oGhgQlqLLPYRizeIXS7jYk8sKJQEpumP8/SXcqfdClVBEziNAs 0XHKPwSG009LLNUZN2j/vxXFXHv8qdjqOoTmHWgCgUwO5f2CvWMSRe9HOVDsw+u/TgHH in2vjxNvfQbSNBz8wDq0nU6Ai8NNs61DTjutbtZ+4WpkamMmObYNqUZ7idkttkjIP+go 2mOPrXTbsTbg9koz1EoYMCh55qVpDlVnCoERM7a4ASlsVtELoEC1OELNtcr5JO5SKweZ A01A== X-Gm-Message-State: AOAM531BqvttIBK1FVSJaeCBF0HsYUecR+sjqD33Lpm96d2W+PDc9gSZ hSrFPRJKoSMAgZA+C1gf2qFIYA== X-Google-Smtp-Source: ABdhPJw3y7ROzg9OQ2a0vx0Co7aebFMTYs2UosINX3/4J5/+VEb4/z5L8//VT0lad9XYnbmnNmyTDw== X-Received: by 2002:a63:221b:: with SMTP id i27mr3009806pgi.44.1614259469960; Thu, 25 Feb 2021 05:24:29 -0800 (PST) Received: from localhost.localdomain ([139.177.225.236]) by smtp.gmail.com with ESMTPSA id x190sm6424676pfx.166.2021.02.25.05.24.19 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 25 Feb 2021 05:24:29 -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, david@redhat.com, naoya.horiguchi@nec.com, joao.m.martins@oracle.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 v17 5/9] mm: hugetlb: set the PageHWPoison to the raw error page Date: Thu, 25 Feb 2021 21:21:26 +0800 Message-Id: <20210225132130.26451-6-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20210225132130.26451-1-songmuchun@bytedance.com> References: <20210225132130.26451-1-songmuchun@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Because we reuse the first tail vmemmap page frame and remap it with read-only, we cannot set the PageHWPosion on some tail pages. So we can use the head[4].private (There are at least 128 struct page structures associated with the optimized HugeTLB page, so using head[4].private is safe) to record the real error page index and set the raw error page PageHWPoison later. Signed-off-by: Muchun Song Reviewed-by: Oscar Salvador Acked-by: David Rientjes --- mm/hugetlb.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 72 insertions(+), 8 deletions(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index b6e4e3f31ad2..bccb6907833f 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1304,6 +1304,74 @@ static inline void destroy_compound_gigantic_page(struct page *page, unsigned int order) { } #endif +#ifdef CONFIG_HUGETLB_PAGE_FREE_VMEMMAP +static inline void hwpoison_subpage_deliver(struct hstate *h, struct page *head) +{ + struct page *page; + + if (!PageHWPoison(head) || !free_vmemmap_pages_per_hpage(h)) + return; + + 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 hwpoison_subpage_set(struct hstate *h, struct page *head, + struct page *page) +{ + if (!PageHWPoison(head)) + return; + + if (free_vmemmap_pages_per_hpage(h)) { + set_page_private(head + 4, page - head); + } else if (page != head) { + /* + * Move PageHWPoison flag from head page to the raw error page, + * which makes any subpages rather than the error page reusable. + */ + SetPageHWPoison(page); + ClearPageHWPoison(head); + } +} + +static inline void hwpoison_subpage_clear(struct hstate *h, struct page *head) +{ + if (!PageHWPoison(head) || !free_vmemmap_pages_per_hpage(h)) + return; + + set_page_private(head + 4, 0); +} +#else +static inline void hwpoison_subpage_deliver(struct hstate *h, struct page *head) +{ +} + +static inline void hwpoison_subpage_set(struct hstate *h, struct page *head, + struct page *page) +{ + if (PageHWPoison(head) && page != head) { + /* + * Move PageHWPoison flag from head page to the raw error page, + * which makes any subpages rather than the error page reusable. + */ + SetPageHWPoison(page); + ClearPageHWPoison(head); + } +} + +static inline void hwpoison_subpage_clear(struct hstate *h, struct page *head) +{ +} +#endif + static int update_and_free_page(struct hstate *h, struct page *page) __releases(&hugetlb_lock) __acquires(&hugetlb_lock) { @@ -1357,6 +1425,8 @@ static int update_and_free_page(struct hstate *h, struct page *page) return -ENOMEM; } + hwpoison_subpage_deliver(h, page); + for (i = 0; i < pages_per_huge_page(h); i++, subpage = mem_map_next(subpage, page, i)) { subpage->flags &= ~(1 << PG_locked | 1 << PG_error | @@ -1801,14 +1871,7 @@ int dissolve_free_huge_page(struct page *page) goto retry; } - /* - * 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); - } + hwpoison_subpage_set(h, head, page); list_del(&head->lru); h->free_huge_pages--; h->free_huge_pages_node[nid]--; @@ -1818,6 +1881,7 @@ int dissolve_free_huge_page(struct page *page) h->surplus_huge_pages--; h->surplus_huge_pages_node[nid]--; h->max_huge_pages++; + hwpoison_subpage_clear(h, head); } } out: