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=-6.8 required=3.0 tests=BAYES_00,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 86C9DC433E7 for ; Fri, 16 Oct 2020 03:06:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 456A32087D for ; Fri, 16 Oct 2020 03:06:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602817560; bh=RGDVu50YtQcqr96w9tGkwP+uISiLNUqTH9xkzGTbwRI=; h=Date:From:To:Subject:In-Reply-To:Reply-To:List-ID:From; b=r5fSlGgKnEX5YnLLzgF1V58u8qSG9f0Z1Mr8jMy359Nj8+s/U+BQb8LdFZs6DUGgC GWXMruztH1H3k63d5h9cWPIQC2dGNPa2ImXGaBjnG2ZEVml2bUC4bxCzPYf4NIP5ZW +mmhwskkV+TBe1GV9gO5qwpIriXYvOQUTpRlmz5c= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393946AbgJPDF7 (ORCPT ); Thu, 15 Oct 2020 23:05:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:44406 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728261AbgJPDF7 (ORCPT ); Thu, 15 Oct 2020 23:05:59 -0400 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 219F320878; Fri, 16 Oct 2020 03:05:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602817557; bh=RGDVu50YtQcqr96w9tGkwP+uISiLNUqTH9xkzGTbwRI=; h=Date:From:To:Subject:In-Reply-To:From; b=jWgmIZF734jH8pTUp9DFp33MJIkMPSGZaCX0gWw4DX/myvhbBMksU5vV/Xq+ZWaFc hlGezap9wAjH20ngbvHAqqHsBLTNhCPsTW7KSCqSI/lO1IcsbM6U56krbczM69zN2S jZUJsBOdTMAdO7TKag9x1PYurbQnWMSRSkLThAgo= Date: Thu, 15 Oct 2020 20:05:56 -0700 From: Andrew Morton To: akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, mm-commits@vger.kernel.org, sjpark@amazon.de, torvalds@linux-foundation.org, willy@infradead.org, ying.huang@intel.com Subject: [patch 029/156] mm/vmscan: allow arbitrary sized pages to be paged out Message-ID: <20201016030556.6JlnVsMzy%akpm@linux-foundation.org> In-Reply-To: <20201015194043.84cda0c1d6ca2a6847f2384a@linux-foundation.org> User-Agent: s-nail v14.8.16 Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org From: "Matthew Wilcox (Oracle)" Subject: mm/vmscan: allow arbitrary sized pages to be paged out Remove the assumption that a compound page has HPAGE_PMD_NR pins from the page cache. Link: https://lkml.kernel.org/r/20200908195539.25896-12-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Acked-by: Kirill A. Shutemov Acked-by: "Huang, Ying" Reviewed-by: SeongJae Park Signed-off-by: Andrew Morton --- mm/vmscan.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/mm/vmscan.c~mm-vmscan-allow-arbitrary-sized-pages-to-be-paged-out +++ a/mm/vmscan.c @@ -725,8 +725,7 @@ static inline int is_page_cache_freeable * that isolated the page, the page cache and optional buffer * heads at page->private. */ - int page_cache_pins = PageTransHuge(page) && PageSwapCache(page) ? - HPAGE_PMD_NR : 1; + int page_cache_pins = thp_nr_pages(page); return page_count(page) - page_has_private(page) == 1 + page_cache_pins; } _