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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 07D5DC001DF for ; Fri, 4 Aug 2023 20:04:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230011AbjHDUEV (ORCPT ); Fri, 4 Aug 2023 16:04:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35016 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229732AbjHDUET (ORCPT ); Fri, 4 Aug 2023 16:04:19 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A3C7010D4; Fri, 4 Aug 2023 13:04:17 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 85DB062113; Fri, 4 Aug 2023 20:04:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DEC35C433C8; Fri, 4 Aug 2023 20:04:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1691179457; bh=EKWkuFGrFfqIl7eejiH4zr+Mt67Qu+U4/swrCNssib4=; h=Date:To:From:Subject:From; b=yV99ElhTUdSKqxaNuHL+AMp/cP7G3Ge5R4R1gNAoP7L7IWG0OD5hNTkCd11nOY80c VCGqFy8SNmT3xVGY7h3Nth1NHF/RYQDAquzlB3BxweY/F7Zo5QpeEk1KrQS8qkBr0/ fJ0cOsauDpYzXsrm74Lqcl1O2uhoKTU6Jn1L0z3s= Date: Fri, 04 Aug 2023 13:04:16 -0700 To: mm-commits@vger.kernel.org, willy@infradead.org, wangkefeng.wang@huawei.com, stable@vger.kernel.org, naoya.horiguchi@nec.com, linmiaohe@huawei.com, akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-hotfixes-stable] mm-memory-failure-avoid-false-hwpoison-page-mapped-error-info.patch removed from -mm tree Message-Id: <20230804200416.DEC35C433C8@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The quilt patch titled Subject: mm: memory-failure: avoid false hwpoison page mapped error info has been removed from the -mm tree. Its filename was mm-memory-failure-avoid-false-hwpoison-page-mapped-error-info.patch This patch was dropped because it was merged into the mm-hotfixes-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Miaohe Lin Subject: mm: memory-failure: avoid false hwpoison page mapped error info Date: Thu, 27 Jul 2023 19:56:42 +0800 folio->_mapcount is overloaded in SLAB, so folio_mapped() has to be done after folio_test_slab() is checked. Otherwise slab folio might be treated as a mapped folio leading to false 'Someone maps the hwpoison page' error info. Link: https://lkml.kernel.org/r/20230727115643.639741-4-linmiaohe@huawei.com Fixes: 230ac719c500 ("mm/hwpoison: don't try to unpoison containment-failed pages") Signed-off-by: Miaohe Lin Reviewed-by: Matthew Wilcox (Oracle) Acked-by: Naoya Horiguchi Cc: Kefeng Wang Cc: Signed-off-by: Andrew Morton --- mm/memory-failure.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) --- a/mm/memory-failure.c~mm-memory-failure-avoid-false-hwpoison-page-mapped-error-info +++ a/mm/memory-failure.c @@ -2499,6 +2499,13 @@ int unpoison_memory(unsigned long pfn) goto unlock_mutex; } + if (folio_test_slab(folio) || PageTable(&folio->page) || folio_test_reserved(folio)) + goto unlock_mutex; + + /* + * Note that folio->_mapcount is overloaded in SLAB, so the simple test + * in folio_mapped() has to be done after folio_test_slab() is checked. + */ if (folio_mapped(folio)) { unpoison_pr_info("Unpoison: Someone maps the hwpoison page %#lx\n", pfn, &unpoison_rs); @@ -2511,9 +2518,6 @@ int unpoison_memory(unsigned long pfn) goto unlock_mutex; } - if (folio_test_slab(folio) || PageTable(&folio->page) || folio_test_reserved(folio)) - goto unlock_mutex; - ghp = get_hwpoison_page(p, MF_UNPOISON); if (!ghp) { if (PageHuge(p)) { _ Patches currently in -mm which might be from linmiaohe@huawei.com are mm-mm_initc-update-obsolete-comment-in-get_pfn_range_for_nid.patch mm-memory-failure-fix-unexpected-return-value-in-soft_offline_page.patch mm-memory-failure-fix-potential-page-refcnt-leak-in-memory_failure.patch mm-memory-failure-remove-unneeded-page-state-check-in-shake_page.patch memory-tier-use-helper-function-destroy_memory_type.patch mm-memory-failure-remove-unneeded-inline-annotation.patch mm-mm_initc-remove-obsolete-macro-hash_small.patch mm-page_alloc-avoid-false-page-outside-zone-error-info.patch memory-tier-rename-destroy_memory_type-to-put_memory_type.patch mm-remove-obsolete-comment-above-struct-per_cpu_pages.patch mm-memcg-minor-cleanup-for-mem_cgroup_id_max.patch mm-memory-failure-remove-unneeded-pagehuge-check.patch mm-memory-failure-ensure-moving-hwpoison-flag-to-the-raw-error-pages.patch mm-memory-failure-dont-account-hwpoison_filter-filtered-pages.patch mm-memory-failure-use-local-variable-huge-to-check-hugetlb-page.patch mm-memory-failure-remove-unneeded-header-files.patch mm-memory-failure-minor-cleanup-for-comments-and-codestyle.patch mm-memory-failure-fetch-compound-head-after-extra-page-refcnt-is-held.patch mm-memory-failure-fix-race-window-when-trying-to-get-hugetlb-folio.patch mm-huge_memory-use-rmap_none-when-calling-page_add_anon_rmap.patch mm-memcg-fix-obsolete-comment-above-mem_cgroup_max_reclaim_loops.patch mm-memcg-minor-cleanup-for-mc_handle_present_pte.patch memory-tier-use-helper-macro-__attr_rw.patch mm-fix-obsolete-function-name-above-debug_pagealloc_enabled_static.patch mm-mprotect-fix-obsolete-function-name-in-change_pte_range.patch mm-memcg-fix-obsolete-function-name-in-mem_cgroup_protection.patch mm-memory-failure-add-pageoffline-check.patch mm-page_alloc-avoid-unneeded-alike_pages-calculation.patch mm-memcg-update-obsolete-comment-above-parent_mem_cgroup.patch mm-page_alloc-remove-unneeded-variable-base.patch mm-memcg-fix-wrong-function-name-above-obj_cgroup_charge_zswap.patch