From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755321AbcANPwH (ORCPT ); Thu, 14 Jan 2016 10:52:07 -0500 Received: from out3-smtp.messagingengine.com ([66.111.4.27]:50179 "EHLO out3-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754501AbcANPwE convert rfc822-to-8bit (ORCPT ); Thu, 14 Jan 2016 10:52:04 -0500 X-Sasl-enc: J7m5Gz2vqqQsvFL0NuJxuGS4buHENKfA+5g1nCvO8h+4 1452786722 From: Nikolaus Rath To: Christoph Hellwig Cc: Nikhilesh Reddy , Miklos Szeredi , fuse-devel , linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, gregkh@linuxfoundation.org, torvalds@linux-foundation.org, linux-fsdevel@vger.kernel.org, viro@zeniv.linux.org.uk, Richard Weinberger , "Theodore Ts'o" , jack@suse.cz, Antonio SJ Musumeci , sven.utcke@gmx.de Subject: Re: [PATCH] fuse: Add support for fuse stacked I/O References: <565394BE.4040506@codeaurora.org> <5696E366.2080605@codeaurora.org> <20160114082554.GA12489@infradead.org> Mail-Copies-To: never Mail-Followup-To: Christoph Hellwig , Nikhilesh Reddy , Miklos Szeredi , fuse-devel , linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, gregkh@linuxfoundation.org, torvalds@linux-foundation.org, linux-fsdevel@vger.kernel.org, viro@zeniv.linux.org.uk, Richard Weinberger , Theodore Ts'o , jack@suse.cz, Antonio SJ Musumeci , sven.utcke@gmx.de Date: Thu, 14 Jan 2016 07:52:00 -0800 In-Reply-To: <20160114082554.GA12489@infradead.org> (Christoph Hellwig's message of "Thu, 14 Jan 2016 00:25:54 -0800") Message-ID: <87mvs8qhun.fsf@thinkpad.rath.org> User-Agent: Gnus/5.130014 (Ma Gnus v0.14) Emacs/24.4 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Jan 14 2016, Christoph Hellwig wrote: > On Wed, Jan 13, 2016 at 03:53:10PM -0800, Nikhilesh Reddy wrote: >> Add support for filesystem stacked read/write of files >> when enabled through a userspace init option of FUSE_STACKED_IO. >> >> When FUSE_STACKED_IO is enabled all the reads and writes >> to the fuse mount point go directly to the native filesystem >> rather than through the fuse daemon. All requests that aren't >> read/write still go thought the userspace code. > > Please write your stacked features as kernel drivers. Could you explain in more detail? I think I don't understand either the why, the how, or what you mean with driver in this context (not sure which one it is). (I'm not the original submitter but interested in this) Best, -Nikolaus -- GPG encrypted emails preferred. Key id: 0xD113FCAC3C4E599F Fingerprint: ED31 791B 2C5C 1613 AF38 8B8A D113 FCAC 3C4E 599F »Time flies like an arrow, fruit flies like a Banana.«