linux-kernel - Re: [PATCH] fuse: Add support for fuse stacked I/O

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Message-ID: <CA+55aFwxaU0Y_UxyKFv6WaYsPWDDzZG-rhVtMuLSPcJ0WLLw2A@mail.gmail.com>
Date:	Thu, 14 Jan 2016 11:19:31 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Nikhilesh Reddy <reddyn@...eaurora.org>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	Miklos Szeredi <miklos@...redi.hu>,
	fuse-devel <fuse-devel@...ts.sourceforge.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux API <linux-api@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	"Theodore Ts'o" <tytso@....edu>, Jan Kara <jack@...e.cz>,
	Antonio SJ Musumeci <trapexit@...wn.link>, sven.utcke@....de,
	Nikolaus Rath <nikolaus@...h.org>,
	Richard Weinberger <richard@....at>
Subject: Re: [PATCH] fuse: Add support for fuse stacked I/O

On Thu, Jan 14, 2016 at 10:57 AM, Nikhilesh Reddy <reddyn@...eaurora.org> wrote:
>
> *I will send out a properly formatted patch shortly.*

So before you do that, can you explain in what cases fuse just wants
to pass through the IO?

Why aren't such cases just using unionfs or something?

In other words, I think that patch needs an explanation for the
*reason* for the new functionality.

               Linus