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=-3.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 62A32C3A5A3 for ; Sun, 25 Aug 2019 00:55:03 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 24A5522CE9 for ; Sun, 25 Aug 2019 00:55:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="aLhNaLvV" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 24A5522CE9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C52DE6B0503; Sat, 24 Aug 2019 20:55:02 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id BB45F6B0505; Sat, 24 Aug 2019 20:55:02 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id ACB076B0506; Sat, 24 Aug 2019 20:55:02 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0063.hostedemail.com [216.40.44.63]) by kanga.kvack.org (Postfix) with ESMTP id 7E8196B0503 for ; Sat, 24 Aug 2019 20:55:02 -0400 (EDT) Received: from smtpin29.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with SMTP id 27724824CA26 for ; Sun, 25 Aug 2019 00:55:02 +0000 (UTC) X-FDA: 75859130844.29.war53_49021fcfe6006 X-HE-Tag: war53_49021fcfe6006 X-Filterd-Recvd-Size: 2917 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf05.hostedemail.com (Postfix) with ESMTP for ; Sun, 25 Aug 2019 00:55:01 +0000 (UTC) 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 628DA22CF7; Sun, 25 Aug 2019 00:55:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566694500; bh=5HYpnWuJ3nYcHULbN9ZEAdHlX5aKAAA5am09MKUmBjA=; h=Date:From:To:Subject:From; b=aLhNaLvVpRCMyKWPS+iYJ4gyE6kwGv3jDwTeIz1IrsW1/fP0VN9CV49gFl3CmXlzY j5/s+PCUithPry/y3C3Db1zr3Q5e7MVIC7L+J8dQb+bPuJnTpofO5KmeVYujBmYO1g Ic3xuUsTnOQYyvi5KyV4HbMubgwDXDCZnriKnWaQ= Date: Sat, 24 Aug 2019 17:54:59 -0700 From: akpm@linux-foundation.org To: akpm@linux-foundation.org, kirill@shutemov.name, linux-mm@kvack.org, mgorman@techsingularity.net, mhocko@kernel.org, mm-commits@vger.kernel.org, stable@vger.kernel.org, torvalds@linux-foundation.org, vbabka@suse.cz, willy@infradead.org Subject: [patch 08/11] mm, page_owner: handle THP splits correctly Message-ID: <20190825005459.Ik4Bi2G1I%akpm@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Vlastimil Babka Subject: mm, page_owner: handle THP splits correctly THP splitting path is missing the split_page_owner() call that split_page() has. As a result, split THP pages are wrongly reported in the page_owner file as order-9 pages. Furthermore when the former head page is freed, the remaining former tail pages are not listed in the page_owner file at all. This patch fixes that by adding the split_page_owner() call into __split_huge_page(). Link: http://lkml.kernel.org/r/20190820131828.22684-2-vbabka@suse.cz Fixes: a9627bc5e34e ("mm/page_owner: introduce split_page_owner and replace manual handling") Reported-by: Kirill A. Shutemov Signed-off-by: Vlastimil Babka Cc: Michal Hocko Cc: Mel Gorman Cc: Matthew Wilcox Cc: Signed-off-by: Andrew Morton --- mm/huge_memory.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/mm/huge_memory.c~mm-page_owner-handle-thp-splits-correctly +++ a/mm/huge_memory.c @@ -32,6 +32,7 @@ #include #include #include +#include #include #include @@ -2516,6 +2517,9 @@ static void __split_huge_page(struct pag } ClearPageCompound(head); + + split_page_owner(head, HPAGE_PMD_ORDER); + /* See comment in __split_huge_page_tail() */ if (PageAnon(head)) { /* Additional pin to swap cache */ _