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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 21A61C282C0 for ; Fri, 25 Jan 2019 16:24:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E39ED218A6 for ; Fri, 25 Jan 2019 16:24:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726321AbfAYQYv (ORCPT ); Fri, 25 Jan 2019 11:24:51 -0500 Received: from mga06.intel.com ([134.134.136.31]:15129 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726108AbfAYQYv (ORCPT ); Fri, 25 Jan 2019 11:24:51 -0500 X-Amp-Result: UNSCANNABLE X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 25 Jan 2019 08:24:50 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,521,1539673200"; d="scan'208";a="111068853" Received: from unknown (HELO localhost.localdomain) ([10.232.112.69]) by orsmga006.jf.intel.com with ESMTP; 25 Jan 2019 08:24:49 -0800 Date: Fri, 25 Jan 2019 09:23:53 -0700 From: Keith Busch To: Kanchan Joshi Cc: linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, linux-ext4@vger.kernel.org, linux-nvme@lists.infradead.org, jack@suse.com, david@fromorbit.com, tytso@mit.edu, prakash.v@samsung.com Subject: Re: [PATCH v2 0/4] Write-hint for FS journal Message-ID: <20190125162353.GA11210@localhost.localdomain> References: <1547047861-7271-1-git-send-email-joshi.k@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1547047861-7271-1-git-send-email-joshi.k@samsung.com> User-Agent: Mutt/1.9.1 (2017-09-22) Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Wed, Jan 09, 2019 at 09:00:57PM +0530, Kanchan Joshi wrote: > Towards supporing write-hints/streams for filesystem journal. > > Here is the v1 patch for background - > https://marc.info/?l=linux-fsdevel&m=154444637519020&w=2 > > Changes since v1: > - introduce four more hints for in-kernel use, as recommended by Dave chinner > & Jens axboe. This isolates kernel-mode hints from user-mode ones. The nvme driver disables streams if the controller doesn't support BLK_MAX_WRITE_HINT number of streams, so this series breaks the feature for controllers that only support up to 4.