From patchwork Wed Jan 5 21:47:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zi Yan X-Patchwork-Id: 1575870 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=sent.com header.i=@sent.com header.a=rsa-sha256 header.s=fm2 header.b=zJFe7Ao9; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=messagingengine.com header.i=@messagingengine.com header.a=rsa-sha256 header.s=fm1 header.b=I9TcvzqS; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4JTjqH4t22z9sPC for ; Thu, 6 Jan 2022 08:51:23 +1100 (AEDT) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4JTjqG712Nz3cBW for ; Thu, 6 Jan 2022 08:51:22 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=sent.com header.i=@sent.com header.a=rsa-sha256 header.s=fm2 header.b=zJFe7Ao9; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=messagingengine.com header.i=@messagingengine.com header.a=rsa-sha256 header.s=fm1 header.b=I9TcvzqS; dkim-atps=neutral X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=sent.com (client-ip=66.111.4.230; helo=new4-smtp.messagingengine.com; envelope-from=zi.yan@sent.com; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=sent.com header.i=@sent.com header.a=rsa-sha256 header.s=fm2 header.b=zJFe7Ao9; dkim=pass (2048-bit key; unprotected) header.d=messagingengine.com header.i=@messagingengine.com header.a=rsa-sha256 header.s=fm1 header.b=I9TcvzqS; dkim-atps=neutral Received: from new4-smtp.messagingengine.com (new4-smtp.messagingengine.com [66.111.4.230]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4JTjlw6lBDz2xgb for ; Thu, 6 Jan 2022 08:48:27 +1100 (AEDT) Received: from compute6.internal (compute6.nyi.internal [10.202.2.46]) by mailnew.nyi.internal (Postfix) with ESMTP id B286B580514; Wed, 5 Jan 2022 16:48:24 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute6.internal (MEProxy); Wed, 05 Jan 2022 16:48:24 -0500 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=fm2; bh=F+6ytW8tADp2L NXytpAkKv+4a//pcBSmjTaldQvhu2o=; b=zJFe7Ao9MCOK+TZjq/K/TbeuXuhub uEMymMtNy7GDdtEO7HZkK2k7I0QJefpyNTc6QIDRv3VbTOQEz0mNoaKnX14u+Qdb o2OErLMPr8nbMPNViHntkADNEWvCU58ZNRNcUUUmv7lhKZFOrqn1ybsMWLAGNaxm lUcKl2Ja/YD7ICRFcBTTQK5B8G882NbVn06HGziGFLC39Gegp3cWIj7DDkwJ7odw C+Q7WHZw32/+23uQlB375cehRMhlM7Ev0KcGrO73+dc0fxhwnorPVP9V7xPUULlD Bm5XJPhUX0VfbeXD3jZhrIUp323BLLWatMr3g4u8XfgsAcn1XBlhLyzSw== 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= fm1; bh=F+6ytW8tADp2LNXytpAkKv+4a//pcBSmjTaldQvhu2o=; b=I9TcvzqS Rw1NjBo+afbuM8HtqRLcbw5Y9/BUmNxengQ94iNfi4ETD2oDiTzizNxDWj0LPQ2B OfoQMTZ8GfnHobghTSW7URMh5JN5eZgGZ1w1YXl8AjktYUMIuDvEgCbRBWcFvfmk 0IByqySd67Ky97vYXjeCnQL5mgBwYo6aKzFN7QmZ5aHMGZ6AdspxurgVt+kzf4fz 5lvpapJNbk7lbPeWTK66P7UyBJJmRF+mSGy4zhtshTg3cFHYh2Mf0BZtzjnCEePw eIGV2ZIxnul9Y/lJzUQVQC08PkN8ojSSITPC+8d7mVxj8WOETGsGkuW690Y2Ehkt n6DTyTq83VG7/w== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvuddrudefjedgieekucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephffvufffkffojghfrhgggfestdhqredtredttdenucfhrhhomhepkghiucgj rghnuceoiihirdihrghnsehsvghnthdrtghomheqnecuggftrfgrthhtvghrnhepieejue dvueduuefhgefhheeiuedvtedvuefgieegveetueeiueehtdegudehfeelnecuvehluhhs thgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepiihirdihrghnsehsvg hnthdrtghomh X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 5 Jan 2022 16:48:24 -0500 (EST) From: Zi Yan To: David Hildenbrand , linux-mm@kvack.org Subject: [RFC PATCH v3 2/8] mm: compaction: handle non-lru compound pages properly in isolate_migratepages_block(). Date: Wed, 5 Jan 2022 16:47:50 -0500 Message-Id: <20220105214756.91065-3-zi.yan@sent.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220105214756.91065-1-zi.yan@sent.com> References: <20220105214756.91065-1-zi.yan@sent.com> MIME-Version: 1.0 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Zi Yan Cc: Mel Gorman , Zi Yan , Robin Murphy , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Eric Ren , virtualization@lists.linux-foundation.org, linuxppc-dev@lists.ozlabs.org, Christoph Hellwig , Vlastimil Babka , Marek Szyprowski Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Zi Yan In isolate_migratepages_block(), a !PageLRU tail page can be encountered when the page is larger than a pageblock. Use compound head page for the checks inside and skip the entire compound page when isolation succeeds. Signed-off-by: Zi Yan --- mm/compaction.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/mm/compaction.c b/mm/compaction.c index b4e94cda3019..ad9053fbbe06 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -979,19 +979,23 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn, * Skip any other type of page */ if (!PageLRU(page)) { + struct page *head = compound_head(page); /* * __PageMovable can return false positive so we need * to verify it under page_lock. */ - if (unlikely(__PageMovable(page)) && - !PageIsolated(page)) { + if (unlikely(__PageMovable(head)) && + !PageIsolated(head)) { if (locked) { unlock_page_lruvec_irqrestore(locked, flags); locked = NULL; } - if (!isolate_movable_page(page, isolate_mode)) + if (!isolate_movable_page(head, isolate_mode)) { + low_pfn += (1 << compound_order(head)) - 1 - (page - head); + page = head; goto isolate_success; + } } goto isolate_fail;