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=-9.6 required=3.0 tests=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=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 2B7EBC433DF for ; Sun, 24 May 2020 19:22:19 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id E5FC9208C3 for ; Sun, 24 May 2020 19:22:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=kernel-dk.20150623.gappssmtp.com header.i=@kernel-dk.20150623.gappssmtp.com header.b="bDCsFlze" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E5FC9208C3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.dk Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 6282B8000A; Sun, 24 May 2020 15:22:17 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 5DAF280007; Sun, 24 May 2020 15:22:17 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 42FEE8000A; Sun, 24 May 2020 15:22:17 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0147.hostedemail.com [216.40.44.147]) by kanga.kvack.org (Postfix) with ESMTP id 26A9E80007 for ; Sun, 24 May 2020 15:22:17 -0400 (EDT) Received: from smtpin02.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id DE8AF824556B for ; Sun, 24 May 2020 19:22:16 +0000 (UTC) X-FDA: 76852583472.02.page65_13e4f155dd600 X-HE-Tag: page65_13e4f155dd600 X-Filterd-Recvd-Size: 3574 Received: from mail-pf1-f194.google.com (mail-pf1-f194.google.com [209.85.210.194]) by imf44.hostedemail.com (Postfix) with ESMTP for ; Sun, 24 May 2020 19:22:16 +0000 (UTC) Received: by mail-pf1-f194.google.com with SMTP id 23so7932369pfy.8 for ; Sun, 24 May 2020 12:22:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=TvoN8a3WZmoogVlnFEo2G3/jPQNtfJ5pQXb6VgaLeNI=; b=bDCsFlzea2K8l+p3JSI1FKOJJN/iUIQ6L4QBMlcQQkwdth5Qd6xp5WdxsO74qmE2uH gNIh1EyuSNq8TGu/O7ma6Wj3V0zQVtIidIFWIuCFLubWqKuzAP4PXDF1hJoA51/djpKI q0zvlwJNSsDn7/d8IsO90pLEvLJ4/fbpE/Esp7nnNDq8iVLb0/yXGjvGDO+gXoaiK0lQ 8jTWUcQ5PJFDyZ1LXgDYg/fHHLW/+H+ST/d/eQGYBajLlCJ8srz2A+h4hzgkD6xjzjC+ Z1Wx1Og3DGA+JcEdbltZrVLu3VUXQrBccs+OnB77TKzta8olRRUlXDRQ0OrpShyD+I8t TR5g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=TvoN8a3WZmoogVlnFEo2G3/jPQNtfJ5pQXb6VgaLeNI=; b=UG0kczqqNdF+BtiwqSgEM3S2S/+n902bMRO5XJKxn6S8BfSo6KJVmjf/7gbIwTcw+v b+1d1zT92Ubs63GedEzed1paEUu6R+jDNeL0Gkm+6ZvPJgeNlOH8xugQPgCrSf9uM8uA 89yPJ8ru2Fj8U39XXCmvb+cT8DZ/3mV3LMATNbMH18QKnoktZ28C2s3uG0qtB9LlhPRz XI/Z0PZUrX5J3/QilpGhkYsfO7x2Mxy78ZcPL0tPM2NAnJw9xGeXhfR/aSA3ero9f4Z8 ToKlzyTM/KgEbizNOWhazy+KJ9u5vYFGyvHvnI2i+/L5iRKEU6nYYA/M0KUH9NoR/By+ 11Aw== X-Gm-Message-State: AOAM532ngkOJ1lUYxduuqMB27Rs/9H55fjFgF8pA4joRp2lncbBn2nAW Yz720Qcbg7JIPinuqIkXWb+A/A== X-Google-Smtp-Source: ABdhPJx6z/j631C9MW2+QGijdBHUqXND2T9T9W5iLJ8e7Bn0BROk5FXSSQIO1YnaN48IleZiosazmw== X-Received: by 2002:a63:e256:: with SMTP id y22mr23124889pgj.441.1590348135428; Sun, 24 May 2020 12:22:15 -0700 (PDT) Received: from x1.lan ([2605:e000:100e:8c61:c871:e701:52fa:2107]) by smtp.gmail.com with ESMTPSA id t21sm10312426pgu.39.2020.05.24.12.22.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 24 May 2020 12:22:14 -0700 (PDT) From: Jens Axboe To: io-uring@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Jens Axboe Subject: [PATCH 02/12] mm: allow read-ahead with IOCB_NOWAIT set Date: Sun, 24 May 2020 13:21:56 -0600 Message-Id: <20200524192206.4093-3-axboe@kernel.dk> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200524192206.4093-1-axboe@kernel.dk> References: <20200524192206.4093-1-axboe@kernel.dk> MIME-Version: 1.0 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: The read-ahead shouldn't block, so allow it to be done even if IOCB_NOWAIT is set in the kiocb. Signed-off-by: Jens Axboe --- mm/filemap.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/mm/filemap.c b/mm/filemap.c index 23a051a7ef0f..80747f1377d5 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -2031,8 +2031,6 @@ static ssize_t generic_file_buffered_read(struct ki= ocb *iocb, =20 page =3D find_get_page(mapping, index); if (!page) { - if (iocb->ki_flags & IOCB_NOWAIT) - goto would_block; page_cache_sync_readahead(mapping, ra, filp, index, last_index - index); --=20 2.26.2