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=-5.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLACK,URIBL_BLOCKED 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 783B2C433DF for ; Fri, 7 Aug 2020 01:06:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6D6F2221E4 for ; Fri, 7 Aug 2020 01:06:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596762417; bh=rwN+S36E5R3s7aijNrpxulCq+9FOy6+XMgLOJArnq6k=; h=Date:From:To:Subject:Reply-To:List-ID:From; b=CwxWce8Ub4ZNKSsfdJO4v79oGZ6cAenQDoX6K1qfI3Es3dSufQQmPXjjLrfFztvw4 /4VfCcRwCeCz0IotVyXAIQ14p2x+gjVtsp44pXoOyXdjEVJ0LGb3sh4jKFrjLOwWpV AnrLRgz9ErCUPB226eKKetxJXaEQvnlfQytZtCsA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726027AbgHGBG5 (ORCPT ); Thu, 6 Aug 2020 21:06:57 -0400 Received: from mail.kernel.org ([198.145.29.99]:40036 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726011AbgHGBG4 (ORCPT ); Thu, 6 Aug 2020 21:06:56 -0400 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0908A2177B; Fri, 7 Aug 2020 01:06:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596762416; bh=rwN+S36E5R3s7aijNrpxulCq+9FOy6+XMgLOJArnq6k=; h=Date:From:To:Subject:From; b=KxpitkZKS8n9X0IfvnE9HBXMq/z0oDyQqYQ/scytVIdHUKXgHMpFYYFYqCe1rZsV9 hnVl6oon0r6/FAoSco1/GaesJ+v11n2IUYjpZo+dEL/saqjZKJIMK/RX1OLNh8wfJi xw4V/SawsXG3d8jwMXrXtRQmV3TdXAJvVuWL2z5Y= Date: Thu, 06 Aug 2020 18:06:55 -0700 From: akpm@linux-foundation.org To: aneesh.kumar@linux.ibm.com, aneesh.kumar@linux.vnet.ibm.com, cai@lca.pw, dave.hansen@intel.com, david@redhat.com, mhocko@kernel.org, mike.kravetz@oracle.com, mm-commits@vger.kernel.org, naoya.horiguchi@nec.com, osalvador@suse.com, tony.luck@intel.com, zeil@yandex-team.ru Subject: + mm-hwpoison-remove-recalculating-hpage.patch added to -mm tree Message-ID: <20200807010655.Kwta4yBO0%akpm@linux-foundation.org> User-Agent: s-nail v14.8.16 Sender: mm-commits-owner@vger.kernel.org Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: mm, hwpoison: remove recalculating hpage has been added to the -mm tree. Its filename is mm-hwpoison-remove-recalculating-hpage.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/mm-hwpoison-remove-recalculating-hpage.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/mm-hwpoison-remove-recalculating-hpage.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Naoya Horiguchi Subject: mm, hwpoison: remove recalculating hpage hpage is never used after try_to_split_thp_page() in memory_failure(), so we don't have to update hpage. So let's not recalculate/use hpage. Link: http://lkml.kernel.org/r/20200806184923.7007-3-nao.horiguchi@gmail.com Signed-off-by: Naoya Horiguchi Signed-off-by: Oscar Salvador Suggested-by: "Aneesh Kumar K.V" Reviewed-by: Mike Kravetz Cc: Aneesh Kumar K.V Cc: Dave Hansen Cc: David Hildenbrand Cc: Dmitry Yakunin Cc: Michal Hocko Cc: Qian Cai Cc: Tony Luck Signed-off-by: Andrew Morton --- mm/memory-failure.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) --- a/mm/memory-failure.c~mm-hwpoison-remove-recalculating-hpage +++ a/mm/memory-failure.c @@ -1342,7 +1342,6 @@ int memory_failure(unsigned long pfn, in } unlock_page(p); VM_BUG_ON_PAGE(!page_count(p), p); - hpage = compound_head(p); } /* @@ -1414,11 +1413,8 @@ int memory_failure(unsigned long pfn, in /* * Now take care of user space mappings. * Abort on fail: __delete_from_page_cache() assumes unmapped page. - * - * When the raw error page is thp tail page, hpage points to the raw - * page after thp split. */ - if (!hwpoison_user_mappings(p, pfn, flags, &hpage)) { + if (!hwpoison_user_mappings(p, pfn, flags, &p)) { action_result(pfn, MF_MSG_UNMAP_FAILED, MF_IGNORED); res = -EBUSY; goto out; _ Patches currently in -mm which might be from naoya.horiguchi@nec.com are mmhwpoison-cleanup-unused-pagehuge-check.patch mm-hwpoison-remove-recalculating-hpage.patch mmhwpoison-inject-dont-pin-for-hwpoison_filter.patch mmhwpoison-introduce-mf_msg_unsplit_thp.patch mmhwpoison-double-check-page-count-in-__get_any_page.patch