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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5DDD3D374BF for ; Thu, 17 Oct 2024 16:11:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=8XyX8u59mNjnQPnGrxzikA04q0KGVl3u3qy1AjZng4g=; b=AKtDXy8LviLSNHQ1m8CzvQ1ng/ pWe3sWuH7u3I52nO+n/Jbt4wTAPwwZZbj9QR2ao9W3PXyxWWVg7TcO9xsyzT8FkPBKvocUK+bqEYt H8JJiigDJ4mDFEsa3yXRFRM4uMKMjtYr+4FHzjG8imLAecE4zb33o/LcAfs/Y7e/azRnD4nucHEY4 eo/bJWw76BS80TA42CuRdB9+dBridGSvjqtnoRnkYVJU00au4535Ed1J9ukhxEsb7rSDpE3CUKpXw v+vh+jDen3VNEC/llFICB6lc6p+WRQpYl42TgfUZKv+e9iPnY3hA6GhOsc4yz5a9j+3WP394Z4C3l /9s6zbYA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1t1T5o-0000000FQnJ-26jH; Thu, 17 Oct 2024 16:11:16 +0000 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1t1T59-0000000FQVx-2kB0 for linux-nvme@lists.infradead.org; Thu, 17 Oct 2024 16:10:38 +0000 Received: from pps.filterd (m0109332.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 49HChA7R011342 for ; Thu, 17 Oct 2024 09:10:34 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=meta.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=s2048-2021-q4; bh=8XyX8u59mNjnQPnGrxzikA04q0KGVl3u3qy1AjZng4g=; b=IpsQFmON4IMW CH/iLUNJvCbdArXLLYsgLxtHPtSmunWocZc6QSNJUgBUeoJdHYieF6TQTIksvdln 7Z9xPLofaq/X2vsdEDJpYSB3/+UjVzv4sj2ZUn0QEOT0uF2iekQaLEQyctRrWLdX a3qhXO7MdefRTbpkdejv4s7txNh2yjT4sESFXtxiAYfC1fNGbxu4rGibsrBrfYLK rKsphDuZCxF2Y1Eb+de/UdcJKLurqYJuescb0DpZ73MvSrYZ7iDi+4yWiH1US/Bu t5V+xB0T7zDgkhiWoiEfIX1KDgR1Zazem27gFeqbeoJZhg3ePEH9TDn6qMKhn+SC 6TsjdCIi7g== Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 429wsspwkp-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 17 Oct 2024 09:10:34 -0700 (PDT) Received: from twshared4085.05.ash9.facebook.com (2620:10d:c0a8:1b::2d) by mail.thefacebook.com (2620:10d:c0a9:6f::8fd4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.2.1544.11; Thu, 17 Oct 2024 16:10:23 +0000 Received: by devbig638.nha1.facebook.com (Postfix, from userid 544533) id 2C20E143A4AFC; Thu, 17 Oct 2024 09:10:14 -0700 (PDT) From: Keith Busch To: , , , , CC: , , , Keith Busch Subject: [PATCHv8 4/6] fs: introduce per-io hint support flag Date: Thu, 17 Oct 2024 09:09:35 -0700 Message-ID: <20241017160937.2283225-5-kbusch@meta.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20241017160937.2283225-1-kbusch@meta.com> References: <20241017160937.2283225-1-kbusch@meta.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-ORIG-GUID: MQaiV_dwqDRn9IrpNUQvTJdFestOl0W2 X-Proofpoint-GUID: MQaiV_dwqDRn9IrpNUQvTJdFestOl0W2 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-05_03,2024-10-04_01,2024-09-30_01 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241017_091035_853584_F4EB100F X-CRM114-Status: GOOD ( 13.68 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org From: Keith Busch A block device may support write hints on a per-io basis. The raw block file operations can effectively use these, but real filesystems are not ready to make use of this. Provide a file_operations flag to indicate support, and set it for the block file operations. Signed-off-by: Keith Busch --- block/fops.c | 2 +- include/linux/fs.h | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/block/fops.c b/block/fops.c index d0b16d3975fd6..15a63e26161ea 100644 --- a/block/fops.c +++ b/block/fops.c @@ -869,7 +869,7 @@ const struct file_operations def_blk_fops =3D { .splice_write =3D iter_file_splice_write, .fallocate =3D blkdev_fallocate, .uring_cmd =3D blkdev_uring_cmd, - .fop_flags =3D FOP_BUFFER_RASYNC, + .fop_flags =3D FOP_BUFFER_RASYNC | FOP_PER_IO_HINTS, }; =20 static __init int blkdev_init(void) diff --git a/include/linux/fs.h b/include/linux/fs.h index 04e875a37f604..026dc9801dc20 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2117,6 +2117,8 @@ struct file_operations { #define FOP_HUGE_PAGES ((__force fop_flags_t)(1 << 4)) /* Treat loff_t as unsigned (e.g., /dev/mem) */ #define FOP_UNSIGNED_OFFSET ((__force fop_flags_t)(1 << 5)) +/* File system can handle per-io hints */ +#define FOP_PER_IO_HINTS ((__force fop_flags_t)(1 << 6)) =20 /* Wrap a directory iterator that needs exclusive inode access */ int wrap_directory_iterator(struct file *, struct dir_context *, --=20 2.43.5