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=-12.8 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,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 0A639C4345A for ; Fri, 24 Jul 2020 07:34:01 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id BFD1B206F0 for ; Fri, 24 Jul 2020 07:34:00 +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="H9chBPz8" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BFD1B206F0 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 EF05C8D0025; Fri, 24 Jul 2020 03:33:54 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id E51A68D0015; Fri, 24 Jul 2020 03:33:54 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D1C9E8D0025; Fri, 24 Jul 2020 03:33:54 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0068.hostedemail.com [216.40.44.68]) by kanga.kvack.org (Postfix) with ESMTP id B7D1F8D0015 for ; Fri, 24 Jul 2020 03:33:54 -0400 (EDT) Received: from smtpin19.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 737628248047 for ; Fri, 24 Jul 2020 07:33:54 +0000 (UTC) X-FDA: 77072155188.19.lock43_181441526f45 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin19.hostedemail.com (Postfix) with ESMTP id 4E2A719776 for ; Fri, 24 Jul 2020 07:33:54 +0000 (UTC) X-HE-Tag: lock43_181441526f45 X-Filterd-Recvd-Size: 3052 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf42.hostedemail.com (Postfix) with ESMTP for ; Fri, 24 Jul 2020 07:33:53 +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=r6GVNDpJ00GIAfQlV8fGdOFlOngs4z7GOfztVZ4Wopg=; b=H9chBPz8VW3nrS8D/DH/sVlU/F qTE3kQJSkvGa29xlm3sAbuZDi82AskW2+7fjPxCRR3QbJ5YsVUt0Kj+m8PmTj83HPitCjtfgBFagh inT+4I3iJoCyCsHSTaIY4hPuGyKoQeZH4Fsyw/aa5PL9uBdYUAkMYnBp1k4e49Ul7v1pqEWn0UxsY XfablgUGRHFB9tB8aOnvgmsHzlderU2IxPDewd6CL5W8+uAmGEFj9vyCWe9GiPc0TNVvHCRXS+iuy Q2LFPaHq7JyKjuiOcqQ6wzIBvrK2CfwQ8vwUbz+CDh8leY7Wq2+X79x5o+SCC6EhkmwDHXTZLDR9y agi2Ht8Q==; Received: from [2001:4bb8:18c:2acc:8dfe:be3c:592c:efc5] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jysD6-0006Dz-GF; Fri, 24 Jul 2020 07:33:41 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Song Liu , Hans de Goede , Richard Weinberger , Minchan Kim , linux-mtd@lists.infradead.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, drbd-dev@lists.linbit.com, linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org Subject: [PATCH 11/14] mm: use SWP_SYNCHRONOUS_IO more intelligently Date: Fri, 24 Jul 2020 09:33:10 +0200 Message-Id: <20200724073313.138789-12-hch@lst.de> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200724073313.138789-1-hch@lst.de> References: <20200724073313.138789-1-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 X-Rspamd-Queue-Id: 4E2A719776 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam03 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: There is no point in trying to call bdev_read_page if SWP_SYNCHRONOUS_IO is not set, as the device won't support it. Signed-off-by: Christoph Hellwig --- mm/page_io.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/mm/page_io.c b/mm/page_io.c index ccda7679008851..7eef3c84766abc 100644 --- a/mm/page_io.c +++ b/mm/page_io.c @@ -403,15 +403,17 @@ int swap_readpage(struct page *page, bool synchrono= us) goto out; } =20 - ret =3D bdev_read_page(sis->bdev, swap_page_sector(page), page); - if (!ret) { - if (trylock_page(page)) { - swap_slot_free_notify(page); - unlock_page(page); - } + if (sis->flags & SWP_SYNCHRONOUS_IO) { + ret =3D bdev_read_page(sis->bdev, swap_page_sector(page), page); + if (!ret) { + if (trylock_page(page)) { + swap_slot_free_notify(page); + unlock_page(page); + } =20 - count_vm_event(PSWPIN); - goto out; + count_vm_event(PSWPIN); + goto out; + } } =20 ret =3D 0; --=20 2.27.0