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_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 BE931C47423 for ; Thu, 24 Sep 2020 13:59:46 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 648FB20888 for ; Thu, 24 Sep 2020 13:59:46 +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="N/ootiBc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 648FB20888 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 1F828900046; Thu, 24 Sep 2020 09:59:27 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 15F1C900040; Thu, 24 Sep 2020 09:59:27 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id EC81E900046; Thu, 24 Sep 2020 09:59:26 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0025.hostedemail.com [216.40.44.25]) by kanga.kvack.org (Postfix) with ESMTP id D0349900040 for ; Thu, 24 Sep 2020 09:59:26 -0400 (EDT) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 947632DFD for ; Thu, 24 Sep 2020 13:59:26 +0000 (UTC) X-FDA: 77298112332.03.watch85_4e0acda2715f Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin03.hostedemail.com (Postfix) with ESMTP id 2D37128A4ED for ; Thu, 24 Sep 2020 13:59:25 +0000 (UTC) X-HE-Tag: watch85_4e0acda2715f X-Filterd-Recvd-Size: 3353 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf19.hostedemail.com (Postfix) with ESMTP for ; Thu, 24 Sep 2020 13:59:24 +0000 (UTC) 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=ggovDsPrY2tPPXwEEhp2BvATO0PndCnAzmG0yva7UFo=; b=N/ootiBcR4K2DEtljvLh9Zsz8j DbEFzcIOE0vb5/auxrmD/v7F1fPZyK6x8XevpU2p1+DxFR61Kz4n2BdQhY7PcvEd65yA1YqQ3sAyF pTSgUibK1yPWO1iTqxeBk7th83prf+n0mxbb2hfZMlUdC5/JxXS5ILsH5bRp4j7IOJTV5juCRiNe+ wYfsnKqRVMCpAGLavfKGjMYbjftaTIPNfi4cWkqZxIlCFu2SUsHUM8AwGBdjeX/LOliursV56AQzK 2dc+y3VruLMxjnINrAWE9AoEhuzEFO5GRCpDD4ruqfyghrFro3F3Kt6tI6tk5tHePRHDdu3Yi/XUZ /MIWNu0w==; Received: from p4fdb0c34.dip0.t-ipconnect.de ([79.219.12.52] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLRlz-0003vR-Sq; Thu, 24 Sep 2020 13:59:01 +0000 From: Christoph Hellwig To: Andrew Morton Cc: Peter Zijlstra , Boris Ostrovsky , Juergen Gross , Stefano Stabellini , Jani Nikula , Joonas Lahtinen , Tvrtko Ursulin , Chris Wilson , Matthew Auld , Rodrigo Vivi , Minchan Kim , Matthew Wilcox , Nitin Gupta , x86@kernel.org, xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-mm@kvack.org Subject: [PATCH 05/11] zsmalloc: switch from alloc_vm_area to get_vm_area Date: Thu, 24 Sep 2020 15:58:47 +0200 Message-Id: <20200924135853.875294-6-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200924135853.875294-1-hch@lst.de> References: <20200924135853.875294-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html 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: Just manually pre-fault the PTEs using apply_to_page_range. Co-developed-by: Minchan Kim Signed-off-by: Christoph Hellwig --- mm/zsmalloc.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index c36fdff9a37131..918c7b019b3d78 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -1122,10 +1122,16 @@ static inline int __zs_cpu_up(struct mapping_area= *area) */ if (area->vm) return 0; - area->vm =3D alloc_vm_area(PAGE_SIZE * 2, NULL); + area->vm =3D get_vm_area(PAGE_SIZE * 2, 0); if (!area->vm) return -ENOMEM; - return 0; + + /* + * Populate ptes in advance to avoid pte allocation with GFP_KERNEL + * in non-preemtible context of zs_map_object. + */ + return apply_to_page_range(&init_mm, (unsigned long)area->vm->addr, + PAGE_SIZE * 2, NULL, NULL); } =20 static inline void __zs_cpu_down(struct mapping_area *area) --=20 2.28.0