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=-12.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 B5254C47420 for ; Mon, 28 Sep 2020 18:01:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5D0CA21924 for ; Mon, 28 Sep 2020 18:01:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=sent.com header.i=@sent.com header.b="M7xV7Ip4"; dkim=temperror (0-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b="ioPd4MMV" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726848AbgI1SBV (ORCPT ); Mon, 28 Sep 2020 14:01:21 -0400 Received: from wnew3-smtp.messagingengine.com ([64.147.123.17]:48141 "EHLO wnew3-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726504AbgI1SBS (ORCPT ); Mon, 28 Sep 2020 14:01:18 -0400 Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailnew.west.internal (Postfix) with ESMTP id A510ED92; Mon, 28 Sep 2020 13:55:24 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute4.internal (MEProxy); Mon, 28 Sep 2020 13:55:25 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sent.com; h=from :to:cc:subject:date:message-id:in-reply-to:references:reply-to :mime-version:content-transfer-encoding; s=fm1; bh=01LYlc5bDzp3u qzR9xxfv49dl40Bp54QbYMpQqXO/5E=; b=M7xV7Ip4pSaGpM8FfuydMwvO0fCGH zGTwAaxetq6YCSXCJaFSXSMVVRR+7XCaxRwCXRNyRgvbA5OkFS4xogt5/hq8aGYa MHoGtx1bA1WnF8b1xTkDW7Ozxs5jJlm3jvzV18BudEsGJL5oftAXPw+S4KWTtOa+ ovNUwCbq0Z297HcQvaS9OMmRr61NfYe0mPj34A6XZYUdqj33OuZabIA3X/lIm5qQ kX+IBv9LpobNgSBad6u3/iWfsrSjSDi8ew4QriaIGvIoLvOauOwfwhX2VX8S5Wyq gk0kHZMz/uIBJSr+E9lyAVIwyGqfLzsFSpuNhRNBwF23CHHOmpaJEZDTw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:reply-to:subject :to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm3; bh=01LYlc5bDzp3uqzR9xxfv49dl40Bp54QbYMpQqXO/5E=; b=ioPd4MMV 55cAG7caB4GzPpNXV6YKinZBo+9I1F6vWb8/o0eJAAfr3y6pUAy0AW00miyueaiy uPXAnW+LNFyjleTU/zBsseynT4nAp/OCozX+lBRzBW0SHY14dH4GdjoGXVOOa8m9 CJRkCP/+uVXmAIF6BqGx1g0ZHQvlXbqYlhxI7voWYfMnU5yr9RVGWfs8TOMCpiM4 OW78uxueiVgxYaCNA8vMEwcuM3vB/BsiKaZDTBjBrxqJ+s5nvGYLo7U8+zrZr4Tt jPemCbUCIf0eR/gfG50NExHXRqqQas2NLOVkJIr/x5hOkBP1qm/gIiTlHk7K7kAw IZ7i+fSPvMZL+Q== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedujedrvdeigdeliecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpefhvffufffkofgjfhhrggfgsedtkeertdertddtnecuhfhrohhmpegkihcujggr nhcuoeiiihdrhigrnhesshgvnhhtrdgtohhmqeenucggtffrrghtthgvrhhnpeduhfffve ektdduhfdutdfgtdekkedvhfetuedufedtgffgvdevleehheevjefgtdenucfkphepuddv rdegiedruddtiedrudeigeenucevlhhushhtvghrufhiiigvpeduvdenucfrrghrrghmpe hmrghilhhfrhhomhepiihirdihrghnsehsvghnthdrtghomh X-ME-Proxy: Received: from nvrsysarch6.NVidia.COM (unknown [12.46.106.164]) by mail.messagingengine.com (Postfix) with ESMTPA id BE8013064688; Mon, 28 Sep 2020 13:55:23 -0400 (EDT) From: Zi Yan To: linux-mm@kvack.org Cc: "Kirill A . Shutemov" , Roman Gushchin , Rik van Riel , Matthew Wilcox , Shakeel Butt , Yang Shi , Jason Gunthorpe , Mike Kravetz , Michal Hocko , David Hildenbrand , William Kucharski , Andrea Arcangeli , John Hubbard , David Nellans , linux-kernel@vger.kernel.org, Zi Yan Subject: [RFC PATCH v2 16/30] mm: debug: adapt dump_page to PUD THP. Date: Mon, 28 Sep 2020 13:54:14 -0400 Message-Id: <20200928175428.4110504-17-zi.yan@sent.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200928175428.4110504-1-zi.yan@sent.com> References: <20200928175428.4110504-1-zi.yan@sent.com> Reply-To: Zi Yan MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Zi Yan Since the order of a PUD THP is greater than MAX_ORDER, do not consider its tail pages corrupted. Also print sub_compound_mapcount when dumping a PMDPageInPUD. Signed-off-by: Zi Yan --- mm/debug.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/mm/debug.c b/mm/debug.c index ccca576b2899..f5b035dc620d 100644 --- a/mm/debug.c +++ b/mm/debug.c @@ -68,7 +68,9 @@ void __dump_page(struct page *page, const char *reason) goto hex_only; } - if (page < head || (page >= head + MAX_ORDER_NR_PAGES)) { + if (page < head || + (page >= head + max_t(unsigned long, compound_nr(head), + (unsigned long)MAX_ORDER_NR_PAGES))) { /* * Corrupt page, so we cannot call page_mapping. Instead, do a * safe subset of the steps that page_mapping() does. Caution: @@ -109,6 +111,8 @@ void __dump_page(struct page *page, const char *reason) head, compound_order(head), head_compound_mapcount(head)); } + if (compound_order(head) == HPAGE_PUD_ORDER && PMDPageInPUD(page)) + pr_warn("sub_compound_mapcount:%d\n", sub_compound_mapcount(page)); } if (PageKsm(page)) type = "ksm "; -- 2.28.0