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From: Christian Brauner <christian.brauner@ubuntu.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: "Jens Axboe" <axboe@kernel.dk>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
	linux-api@vger.kernel.org, "Jonathan Corbet" <corbet@lwn.net>,
	"Serge Hallyn" <serge@hallyn.com>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	"Tejun Heo" <tj@kernel.org>,
	"David S. Miller" <davem@davemloft.net>,
	"Saravana Kannan" <saravanak@google.com>,
	"Jan Kara" <jack@suse.cz>, "David Howells" <dhowells@redhat.com>,
	"Seth Forshee" <seth.forshee@canonical.com>,
	"David Rheinsberg" <david.rheinsberg@gmail.com>,
	"Tom Gundersen" <teg@jklm.no>,
	"Christian Kellner" <ckellner@redhat.com>,
	"Dmitry Vyukov" <dvyukov@google.com>,
	"Stéphane Graber" <stgraber@ubuntu.com>,
	linux-doc@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH 2/8] loopfs: implement loopfs
Date: Thu, 9 Apr 2020 10:33:19 +0200	[thread overview]
Message-ID: <20200409083319.nlemf6d7g33hxhiy@wittgenstein> (raw)
In-Reply-To: <20200409075320.GA26234@infradead.org>

On Thu, Apr 09, 2020 at 12:53:20AM -0700, Christoph Hellwig wrote:
> Almost 600 lines of code for a little bit of fine grained control
> is the wrong tradeoff.  Please find a cheaper way to do this.

I think that's a slight misrepresentation of the patchset. Of course, I
get reservations against adding new code but none of this code will
exist at all if the config option is not set; and the config option is
not selected by default. I don't want people to have to use something
they don't care about of course.
The patchset itself unblocks a range of use-cases we had issues with for
quite a while and the standalone, tiny filesystem approach has served us
well already, so this is not something new. It's not just gaining
fine-grained control, it's a whole set of new uses and we don't just do
it for the fun of doing it but because we do have actual users of this.

Christian

  reply	other threads:[~2020-04-09  8:54 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-08 15:21 [PATCH 0/8] loopfs Christian Brauner
2020-04-08 15:21 ` [PATCH 1/8] kobject_uevent: remove unneeded netlink_ns check Christian Brauner
2020-04-08 15:21 ` [PATCH 2/8] loopfs: implement loopfs Christian Brauner
2020-04-09  5:39   ` David Rheinsberg
2020-04-09  8:26     ` Christian Brauner
2020-04-12 10:38       ` David Rheinsberg
2020-04-12 12:03         ` Christian Brauner
2020-04-12 13:04           ` Christian Brauner
2020-04-12 13:44           ` David Rheinsberg
2020-04-09  7:53   ` Christoph Hellwig
2020-04-09  8:33     ` Christian Brauner [this message]
2020-04-08 15:21 ` [PATCH 3/8] loop: use ns_capable for some loop operations Christian Brauner
2020-04-08 15:21 ` [PATCH 4/8] kernfs: handle multiple namespace tags Christian Brauner
2020-04-13 18:46   ` Tejun Heo
2020-04-08 15:21 ` [PATCH 5/8] kernfs: let objects opt-in to propagating from the initial namespace Christian Brauner
2020-04-13 19:02   ` Tejun Heo
2020-04-13 19:39     ` Christian Brauner
2020-04-13 19:45       ` Tejun Heo
2020-04-13 19:59         ` Christian Brauner
2020-04-13 20:37           ` Tejun Heo
2020-04-14 10:39             ` Christian Brauner
2020-04-08 15:21 ` [PATCH 6/8] genhd: add minimal namespace infrastructure Christian Brauner
2020-04-13 19:04   ` Tejun Heo
2020-04-13 19:42     ` Christian Brauner
2020-04-08 15:21 ` [PATCH 7/8] loopfs: start attaching correct namespace during loop_add() Christian Brauner
2020-04-08 15:21 ` [PATCH 8/8] loopfs: only show devices in their correct instance Christian Brauner
2020-04-08 16:24 ` [PATCH 0/8] loopfs Jann Horn
2020-04-08 16:41   ` Stéphane Graber
2020-04-09  7:02     ` Dmitry Vyukov

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