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=-9.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 499ACC433DF for ; Fri, 29 May 2020 02:59:29 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 0AD832075F for ; Fri, 29 May 2020 02:59:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="isc6VxuA" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0AD832075F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 9A001800CE; Thu, 28 May 2020 22:58:33 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 9E1EB800D3; Thu, 28 May 2020 22:58:32 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6F7B8800D0; Thu, 28 May 2020 22:58:32 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0123.hostedemail.com [216.40.44.123]) by kanga.kvack.org (Postfix) with ESMTP id 12549800CB for ; Thu, 28 May 2020 22:58:32 -0400 (EDT) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id D3CD88B4DA for ; Fri, 29 May 2020 02:58:31 +0000 (UTC) X-FDA: 76868248422.30.river85_103953e79c028 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin30.hostedemail.com (Postfix) with ESMTP id B7323180B3C83 for ; Fri, 29 May 2020 02:58:31 +0000 (UTC) X-HE-Tag: river85_103953e79c028 X-Filterd-Recvd-Size: 2939 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf06.hostedemail.com (Postfix) with ESMTP for ; Fri, 29 May 2020 02:58:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=MKRr7ww84nPVgNZDl/LbIY5Kct5MfTlH0fl1kdElxWI=; b=isc6VxuAROW6QPBdcZWtCOBdXK Dce35Uix6ld8hXKaOLvM+/NheumIXF3rstHLTirQ+KxHFYVB1mjF65YT2Nu7IkJAhRA/LpICuXy/0 FangQ7Oz4W/i5RLkasSKaW3CzH3btIF6qcTGO82dj9tfJXo0Dbs1nh8P8mLPttPD/QTpNuBMBVG2P Alf1Enktwl0R+YuY3+mN/G1mEpoJagSdRJWWhG3p+sXvhB9kSgarpl7QKSEYtuyYS8WvKAPtQindp 4kIYXGliEJRd46t8ETBL96Ff9/RvWDsQfZFCXkWP3F6LfqYiNl7V7jlkz9ng/31/6Tjc9vKOxSq5W LMUk8JGQ==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jeVE3-0008Sb-IQ; Fri, 29 May 2020 02:58:27 +0000 From: Matthew Wilcox To: linux-fsdevel@vger.kernel.org Cc: "Kirill A. Shutemov" , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Matthew Wilcox Subject: [PATCH v5 26/39] mm: Fix total_mapcount assumption of page size Date: Thu, 28 May 2020 19:58:11 -0700 Message-Id: <20200529025824.32296-27-willy@infradead.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200529025824.32296-1-willy@infradead.org> References: <20200529025824.32296-1-willy@infradead.org> MIME-Version: 1.0 X-Rspamd-Queue-Id: B7323180B3C83 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 Content-Transfer-Encoding: quoted-printable 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: "Kirill A. Shutemov" File THPs may now be of arbitrary order. Signed-off-by: Kirill A. Shutemov Signed-off-by: Matthew Wilcox (Oracle) --- mm/huge_memory.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 7a5e2b470bc7..15a86b06befc 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2668,7 +2668,7 @@ static void __split_huge_page(struct page *page, st= ruct list_head *list, =20 int total_mapcount(struct page *page) { - int i, compound, ret; + int i, compound, nr, ret; =20 VM_BUG_ON_PAGE(PageTail(page), page); =20 @@ -2676,16 +2676,17 @@ int total_mapcount(struct page *page) return atomic_read(&page->_mapcount) + 1; =20 compound =3D compound_mapcount(page); + nr =3D compound_nr(page); if (PageHuge(page)) return compound; ret =3D compound; - for (i =3D 0; i < HPAGE_PMD_NR; i++) + for (i =3D 0; i < nr; i++) ret +=3D atomic_read(&page[i]._mapcount) + 1; /* File pages has compound_mapcount included in _mapcount */ if (!PageAnon(page)) - return ret - compound * HPAGE_PMD_NR; + return ret - compound * nr; if (PageDoubleMap(page)) - ret -=3D HPAGE_PMD_NR; + ret -=3D nr; return ret; } =20 --=20 2.26.2