From: Rusty Russell <rusty@rustcorp.com.au>
To: Gerd Hoffmann <kraxel@redhat.com>
Cc: Amit Shah <amit.shah@redhat.com>,
Anthony Liguori <anthony@codemonkey.ws>,
kvm@vger.kernel.org, qemu-devel@nongnu.org,
"Richard W.M. Jones" <rjones@redhat.com>,
virtualization@lists.linux-foundation.org
Subject: Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication
Date: Tue, 11 Aug 2009 08:39:28 +0930 [thread overview]
Message-ID: <200908110839.28901.rusty@rustcorp.com.au> (raw)
In-Reply-To: <4A7FECCA.8080804@redhat.com>
On Mon, 10 Aug 2009 07:17:54 pm Gerd Hoffmann wrote:
> On 08/10/09 08:55, Amit Shah wrote:
> >> Bad example. Quite a lot of modern devices drivers are using dynamic
> >> major/minor numbers because they have proven to be such a pain in the
> >> butt. That's why we have more sophisticated mechanisms like udev for
> >> userspace to make use of.
> >
> > Let me explain how we came to this numbering: we first had support for
> > 'naming' ports and the names were obtained by userspace programs by an
> > ioctl. Rusty suggested to use some numbering scheme where some ports
> > could exist at predefined locations so that we wouldn't need the naming
> > and the ioctls around it.
>
> I think the naming is very important.
I disagree. If you can hand out names, you can hand out numbers. Whether
the guest chooses to put that number in sysfs or make it a minor, I don't
care.
Rusty.
WARNING: multiple messages have this Message-ID (diff)
From: Rusty Russell <rusty@rustcorp.com.au>
To: Gerd Hoffmann <kraxel@redhat.com>
Cc: kvm@vger.kernel.org, qemu-devel@nongnu.org,
"Richard W.M. Jones" <rjones@redhat.com>,
virtualization@lists.linux-foundation.org,
Amit Shah <amit.shah@redhat.com>
Subject: Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication
Date: Tue, 11 Aug 2009 08:39:28 +0930 [thread overview]
Message-ID: <200908110839.28901.rusty@rustcorp.com.au> (raw)
In-Reply-To: <4A7FECCA.8080804@redhat.com>
On Mon, 10 Aug 2009 07:17:54 pm Gerd Hoffmann wrote:
> On 08/10/09 08:55, Amit Shah wrote:
> >> Bad example. Quite a lot of modern devices drivers are using dynamic
> >> major/minor numbers because they have proven to be such a pain in the
> >> butt. That's why we have more sophisticated mechanisms like udev for
> >> userspace to make use of.
> >
> > Let me explain how we came to this numbering: we first had support for
> > 'naming' ports and the names were obtained by userspace programs by an
> > ioctl. Rusty suggested to use some numbering scheme where some ports
> > could exist at predefined locations so that we wouldn't need the naming
> > and the ioctls around it.
>
> I think the naming is very important.
I disagree. If you can hand out names, you can hand out numbers. Whether
the guest chooses to put that number in sysfs or make it a minor, I don't
care.
Rusty.
next prev parent reply other threads:[~2009-08-10 23:09 UTC|newest]
Thread overview: 175+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-27 18:04 virtio-serial: An interface for host-guest communication Amit Shah
2009-07-27 18:04 ` [Qemu-devel] " Amit Shah
2009-07-27 18:04 ` [PATCH 1/1] virtio_serial: A char device for simple guest <-> host communication Amit Shah
2009-07-27 18:04 ` [Qemu-devel] " Amit Shah
2009-07-27 18:04 ` [PATCH 1/3] virtio-serial: virtio device for simple host <-> guest communication Amit Shah
2009-07-27 18:04 ` [Qemu-devel] " Amit Shah
2009-07-27 18:04 ` [PATCH 2/3] vnc: add a is_vnc_active() helper Amit Shah
2009-07-27 18:04 ` [Qemu-devel] " Amit Shah
2009-07-27 18:04 ` [PATCH 3/3] virtio-serial: vnc: support for sending / receiving guest clipboard Amit Shah
2009-07-27 18:04 ` [Qemu-devel] " Amit Shah
2009-07-27 18:04 ` Amit Shah
2009-07-27 18:04 ` [PATCH 2/3] vnc: add a is_vnc_active() helper Amit Shah
2009-07-27 18:04 ` [PATCH 1/3] virtio-serial: virtio device for simple host <-> guest communication Amit Shah
2009-08-05 0:03 ` [PATCH 1/1] virtio_serial: A char device for simple guest <-> host communication Rusty Russell
2009-08-05 0:03 ` [Qemu-devel] " Rusty Russell
2009-08-05 5:12 ` Amit Shah
2009-08-05 5:12 ` [Qemu-devel] " Amit Shah
2009-08-05 9:58 ` Amit Shah
2009-08-05 9:58 ` [Qemu-devel] " Amit Shah
2009-08-05 9:58 ` Amit Shah
2009-08-05 0:03 ` Rusty Russell
2009-07-27 18:04 ` Amit Shah
2009-07-27 20:22 ` virtio-serial: An interface for host-guest communication Anthony Liguori
2009-07-27 20:22 ` [Qemu-devel] " Anthony Liguori
2009-07-27 20:32 ` Daniel P. Berrange
2009-07-27 20:37 ` Anthony Liguori
2009-07-27 20:37 ` Anthony Liguori
2009-07-27 20:46 ` Jamie Lokier
2009-07-27 20:46 ` Jamie Lokier
2009-07-27 20:46 ` Jamie Lokier
2009-07-27 23:44 ` Anthony Liguori
2009-07-27 23:44 ` Anthony Liguori
2009-07-27 23:44 ` Anthony Liguori
2009-07-28 10:36 ` Amit Shah
2009-07-28 10:36 ` Amit Shah
2009-07-28 10:36 ` Amit Shah
2009-07-28 13:42 ` Anthony Liguori
2009-07-29 7:44 ` Amit Shah
2009-07-29 7:44 ` Amit Shah
2009-07-29 7:48 ` Gleb Natapov
2009-07-29 7:48 ` Gleb Natapov
2009-08-05 18:00 ` Jamie Lokier
2009-08-05 18:00 ` Jamie Lokier
2009-08-05 18:00 ` Jamie Lokier
2009-07-29 7:48 ` Gleb Natapov
2009-07-29 7:44 ` Amit Shah
2009-07-28 13:42 ` Anthony Liguori
2009-07-28 14:00 ` Richard W.M. Jones
2009-07-28 14:48 ` Anthony Liguori
2009-07-28 14:55 ` Richard W.M. Jones
2009-07-28 14:55 ` Richard W.M. Jones
2009-07-28 15:00 ` Anthony Liguori
2009-07-28 15:00 ` Anthony Liguori
2009-07-28 14:48 ` Anthony Liguori
2009-08-03 19:57 ` Anthony Liguori
2009-08-03 19:57 ` Anthony Liguori
2009-08-05 17:57 ` Jamie Lokier
2009-08-05 17:57 ` Jamie Lokier
2009-08-05 18:00 ` Anthony Liguori
2009-08-05 18:00 ` Anthony Liguori
2009-08-05 18:00 ` Anthony Liguori
2009-08-06 10:38 ` Amit Shah
2009-08-06 10:38 ` Amit Shah
2009-08-06 10:38 ` Amit Shah
2009-08-06 13:29 ` Anthony Liguori
2009-08-06 13:29 ` Anthony Liguori
2009-08-06 13:29 ` Anthony Liguori
2009-08-06 13:41 ` Amit Shah
2009-08-06 13:41 ` Amit Shah
2009-08-06 13:58 ` Anthony Liguori
2009-08-06 13:58 ` Anthony Liguori
2009-08-06 14:04 ` Amit Shah
2009-08-06 14:04 ` Amit Shah
2009-08-06 17:37 ` Jamie Lokier
2009-08-06 17:37 ` Jamie Lokier
2009-08-06 17:37 ` Jamie Lokier
2009-08-07 6:38 ` Amit Shah
2009-08-07 6:38 ` Amit Shah
2009-08-07 14:14 ` Anthony Liguori
2009-08-07 14:14 ` Anthony Liguori
2009-08-10 6:55 ` Amit Shah
2009-08-10 6:55 ` Amit Shah
2009-08-10 9:47 ` Gerd Hoffmann
2009-08-10 9:47 ` Gerd Hoffmann
2009-08-10 9:47 ` Gerd Hoffmann
2009-08-10 13:02 ` Anthony Liguori
2009-08-10 13:02 ` Anthony Liguori
2009-08-10 13:02 ` Anthony Liguori
2009-08-10 14:02 ` Gerd Hoffmann
2009-08-10 14:02 ` Gerd Hoffmann
2009-08-10 14:20 ` Anthony Liguori
2009-08-10 14:20 ` Anthony Liguori
2009-08-10 15:34 ` Gerd Hoffmann
2009-08-10 15:34 ` Gerd Hoffmann
2009-08-10 16:59 ` Anthony Liguori
2009-08-10 16:59 ` Anthony Liguori
2009-08-10 16:59 ` Anthony Liguori
2009-08-10 17:27 ` Anthony Liguori
2009-08-10 17:27 ` Anthony Liguori
2009-08-10 17:27 ` Anthony Liguori
2009-08-12 18:27 ` Paul Brook
2009-08-12 18:27 ` Paul Brook
2009-08-12 18:27 ` Paul Brook
2009-08-14 8:15 ` Amit Shah
2009-08-14 8:15 ` Amit Shah
2009-08-14 8:15 ` Amit Shah
2009-08-14 13:29 ` Anthony Liguori
2009-08-14 13:29 ` Anthony Liguori
2009-08-14 13:29 ` Anthony Liguori
2009-08-14 13:41 ` Amit Shah
2009-08-14 13:41 ` Amit Shah
2009-08-14 13:41 ` Amit Shah
2009-08-20 13:42 ` Amit Shah
2009-08-20 13:42 ` Amit Shah
2009-08-20 14:25 ` Daniel P. Berrange
2009-08-20 14:25 ` Daniel P. Berrange
2009-08-20 14:38 ` Amit Shah
2009-08-20 14:38 ` Amit Shah
2009-08-20 14:42 ` Amit Shah
2009-08-20 14:42 ` Amit Shah
2009-08-20 14:42 ` Amit Shah
2009-08-20 13:42 ` Amit Shah
2009-08-14 13:49 ` Gerd Hoffmann
2009-08-14 13:49 ` Gerd Hoffmann
2009-08-14 16:25 ` Anthony Liguori
2009-08-14 16:25 ` Anthony Liguori
2009-08-14 16:25 ` Anthony Liguori
2009-08-20 7:31 ` Rusty Russell
2009-08-20 7:31 ` Rusty Russell
2009-08-20 7:44 ` Gerd Hoffmann
2009-08-20 7:44 ` Gerd Hoffmann
2009-08-20 7:55 ` Amit Shah
2009-08-20 7:55 ` Amit Shah
2009-08-20 17:10 ` Jamie Lokier
2009-08-20 17:10 ` Jamie Lokier
2009-08-20 17:10 ` Jamie Lokier
2009-08-20 7:55 ` Amit Shah
2009-08-25 12:43 ` Rusty Russell
2009-08-25 12:43 ` Rusty Russell
2009-08-25 13:00 ` Gerd Hoffmann
2009-08-25 13:00 ` Gerd Hoffmann
2009-08-25 13:00 ` Gerd Hoffmann
2009-08-25 12:43 ` Rusty Russell
2009-08-20 7:44 ` Gerd Hoffmann
2009-08-20 7:31 ` Rusty Russell
2009-08-10 15:34 ` Gerd Hoffmann
2009-08-10 14:20 ` Anthony Liguori
2009-08-10 14:20 ` Anthony Liguori
2009-08-10 14:20 ` Anthony Liguori
2009-08-10 14:20 ` Anthony Liguori
2009-08-10 14:02 ` Gerd Hoffmann
2009-08-10 23:09 ` Rusty Russell
2009-08-10 23:09 ` Rusty Russell [this message]
2009-08-10 23:09 ` Rusty Russell
2009-08-11 0:16 ` Anthony Liguori
2009-08-11 0:16 ` Anthony Liguori
2009-08-11 0:16 ` Anthony Liguori
2009-08-10 14:27 ` Anthony Liguori
2009-08-10 14:27 ` Anthony Liguori
2009-08-10 15:57 ` Gerd Hoffmann
2009-08-10 15:57 ` Gerd Hoffmann
2009-08-10 15:57 ` Gerd Hoffmann
2009-08-07 6:38 ` Amit Shah
2009-08-06 14:04 ` Amit Shah
2009-08-06 13:58 ` Anthony Liguori
2009-08-06 13:41 ` Amit Shah
2009-08-06 10:35 ` Amit Shah
2009-08-06 10:35 ` Amit Shah
2009-08-06 10:35 ` Amit Shah
2009-08-05 17:57 ` Jamie Lokier
2009-08-05 18:32 ` Richard W.M. Jones
2009-08-05 18:32 ` Richard W.M. Jones
2009-07-28 14:00 ` Richard W.M. Jones
2009-07-27 20:32 ` Daniel P. Berrange
2009-07-27 20:22 ` Anthony Liguori
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