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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 61184C07E9E for ; Mon, 12 Jul 2021 04:20:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 488AC60FF1 for ; Mon, 12 Jul 2021 04:20:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232163AbhGLEWs (ORCPT ); Mon, 12 Jul 2021 00:22:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55956 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233073AbhGLEWo (ORCPT ); Mon, 12 Jul 2021 00:22:44 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA280C0613E8; Sun, 11 Jul 2021 21:19:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.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=5ILLJtmg4y7//Nl5cqO6Dt5oKOASFCS0mS2xCX9QyaA=; b=H0jet65lIWAMnR1NyCS5Y4GXIv fBvcRNCCZlWWs5+Tn+2iTULAhGIRs9kLk3CkjltQTRHtVNgXqnuGHYoBl1zrA0AQo+Obzzw8SRh/u uz2vMsN+oZ/+plX61E0O2J6Y09Z3On6c5gIJQR+TkPvsyGKmJyOcdRH3ygr2FiUmjs8eLhUyfNZX1 ros/9A+6i90U8egZKoSkRQl55mIpdID64duhWLrkm5V/ugJ8IBXlHX6F1f588p7x1YxBFwnqy6gwZ 57T4o5kSAG8cgz1tZZI2gXpWURNRNaU0YpE57oBeZRt5xAIm4iWzGM5rG08GKK7BfI2Ud0o45uE+M 2u3ToKcQ==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1m2nOV-00GroF-Jn; Mon, 12 Jul 2021 04:18:19 +0000 From: "Matthew Wilcox (Oracle)" To: linux-kernel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v13 135/137] mm/vmscan: Optimise shrink_page_list for smaller THPs Date: Mon, 12 Jul 2021 04:06:59 +0100 Message-Id: <20210712030701.4000097-136-willy@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210712030701.4000097-1-willy@infradead.org> References: <20210712030701.4000097-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org A THP which is smaller than a PMD does not need to do the extra work in try_to_unmap() of trying to split a PMD entry. Signed-off-by: Matthew Wilcox (Oracle) --- mm/vmscan.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 8b17e46dbf32..433956675107 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1496,7 +1496,8 @@ static unsigned int shrink_page_list(struct list_head *page_list, enum ttu_flags flags = TTU_BATCH_FLUSH; bool was_swapbacked = PageSwapBacked(page); - if (unlikely(PageTransHuge(page))) + if (PageTransHuge(page) && + thp_order(page) >= HPAGE_PMD_ORDER) flags |= TTU_SPLIT_HUGE_PMD; try_to_unmap(page, flags); -- 2.30.2