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=-6.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED 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 DF47DC433FE for ; Fri, 3 Sep 2021 17:48:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CB11860E77 for ; Fri, 3 Sep 2021 17:48:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349898AbhICRtf (ORCPT ); Fri, 3 Sep 2021 13:49:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:44042 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229789AbhICRta (ORCPT ); Fri, 3 Sep 2021 13:49:30 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8889360238; Fri, 3 Sep 2021 17:48:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1630691309; bh=5KPQNzq7zcpnglX8kIXWMwgMGHFOk9mDXLUwIbAoveg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=TNzRIazyWLOCZLPXzW1GyQ/x+AXDbP3d5l4QGBGzRtReQrMW4G+MLh58XouNGQ6Ib opu8Z+jKPa8gRN8NoW7K1DcVp/9TLtOXlit+r8FOYelutpwNRkKwjKpJamBv/1uob6 4PXY0o9xEaPeh3Li/ClPazwXgd35+bZqTrVlNbNNCy1jX0WoFCmKprYwPYpWmt1KQq t9ZGVCWJmuS765N9XSkCsMw7hRK1dcTZe5NTVDkllZfommMQFuV1G10AyHZl7IpoBx wdzpXlb5iUIdHfkuqjBoVrcEdRVzqHy5tF2xy9MS0nczjOtIr6eDTQ0d7NUrHzZhO+ EtiXbDpvP5ivA== Date: Fri, 3 Sep 2021 10:48:18 -0700 From: Eric Biggers To: Szabolcs Szakacsits Cc: Linus Torvalds , Theodore Ts'o , Matthew Wilcox , "Leonidas P. Papadakos" , Konstantin Komarov , zajec5@gmail.com, "Darrick J. Wong" , Greg Kroah-Hartman , Hans de Goede , linux-fsdevel , Linux Kernel Mailing List , Al Viro , Miklos Szeredi Subject: Re: NTFS testing (was: [GIT PULL] vboxsf fixes for 5.14-1 Message-ID: References: <4e8c0640-d781-877c-e6c5-ed5cc09443f6@gmail.com> <20210716114635.14797-1-papadakospan@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Sep 03, 2021 at 01:09:40AM +0300, Szabolcs Szakacsits wrote: > User space drivers can have major disadvantages for certain workloads > however how relevant are those for NTFS users? Most people use NTFS for > file transfers in which case ntfs-3g read and write speed is about 15-20% > less compared to ext4. For example in some quick tests ext4 read was > 3.4 GB/s versus ntfs-3g 2.8 GB/s, and write was 1.3 GB/s versus 1.1 GB/s. Your company's own advertising materials promoting your proprietary NTFS driver (https://www.tuxera.com/products/tuxera-ntfs-embedded) claim that NTFS-3G is much slower than ext4: Read: NTFS-3G: 63.4 MB/s ext4: 113.8 MB/s "Microsoft NTFS by Tuxera": 116 MB/s Write: NTFS-3G: 16.3 MB/s ext4: 92.4 MB/s "Microsoft NTFS by Tuxera": 113.3 MB/s I'm not sure why anything you say should have any credibility when it contradicts what your company says elsewhere, and your company has a vested interest in not having proper NTFS support upstreamed to compete with their proprietary driver. (Note that Tuxera doesn't provide much support for NTFS-3G; most of their efforts are focused on their proprietary driver.) - Eric