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,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT 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 61BCAC43142 for ; Fri, 22 Jan 2021 17:21:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 38CBA23AC2 for ; Fri, 22 Jan 2021 17:21:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728777AbhAVQu6 (ORCPT ); Fri, 22 Jan 2021 11:50:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48566 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729650AbhAVQXy (ORCPT ); Fri, 22 Jan 2021 11:23:54 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1B535C0613D6; Fri, 22 Jan 2021 08:23:14 -0800 (PST) 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: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:In-Reply-To:References; bh=nmbJnm50gZMOc+7PIT6wU2c1XXrqeE+TUm7Cw7Zy394=; b=h6Z17Sj4n8EOAU0uLOogjb9AS1 chcTwmbMzQVmY2eh03mUZDYIrwnhhk9Uq2Zzms6rtzlAmj7l/8UKzfqyUeY3w5wvNCy4m8+1dFkmD o7kKc10SFC/fMbxsIrX7FDfPgTgfwQTh5Y/moY7xzgeAsRJf1XRCl0oUq5jw9ZpNfk6LWrjpY73ji e6A7LyeXzE1bCeu2Et0CvE+GVnC7kfdisXM3/+VLIKXnkv/PC/BhndeO8C7EfpbYV84ESUJru9O6K /pcBZjwfGKAtxwfeB3c/hIBSZLVEICTYkwEKo11gW1G48HI8/VSg07TbQcyDgrLCvaVPWA0zRaikm XnaLnYrQ==; Received: from 089144206130.atnat0015.highway.bob.at ([89.144.206.130] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1l2zD5-000xDY-2H; Fri, 22 Jan 2021 16:23:02 +0000 From: Christoph Hellwig To: linux-xfs@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, avi@scylladb.com Subject: reduce sub-block DIO serialisation v4 Date: Fri, 22 Jan 2021 17:20:32 +0100 Message-Id: <20210122162043.616755-1-hch@lst.de> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org This takes the approach from Dave, but adds a new flag instead of abusing the nowait one, and keeps a simpler calling convention for iomap_dio_rw. Changes since v3: - further comment improvements - micro-optimize an alignment check Changes since v2: - add another sanity check in __iomap_dio_rw - rename IOMAP_DIO_UNALIGNED to IOMAP_DIO_OVERWRITE_ONLY - use more consistent parameter naming - improve a few comments - cleanup an if statement Changes since v1: - rename the new flags - add an EOF check for subblock I/O - minor cleanups