From: Mike Mackovitch <macko@asicdesigners.com>
To: "David S. Miller" <davem@redhat.com>
Cc: Pete Zaitcev <zaitcev@redhat.com>,
root@chaos.analogic.com, linux-kernel@vger.kernel.org
Subject: Re: Is it useful to support user level drivers
Date: Thu, 21 Jun 2001 16:09:50 -0700 [thread overview]
Message-ID: <20010621160949.A10977@wacko.asicdesigners.com> (raw)
In-Reply-To: <mailman.993156181.18994.linux-kernel2news@redhat.com> <200106212206.f5LM6dK12282@devserv.devel.redhat.com> <15154.29468.215080.602628@pizda.ninka.net>
In-Reply-To: <15154.29468.215080.602628@pizda.ninka.net>; from davem@redhat.com on Thu, Jun 21, 2001 at 03:20:12PM -0700
On Thu, Jun 21, 2001 at 03:20:12PM -0700, David S. Miller wrote:
>
> Pete Zaitcev writes:
> > If memory does not deceive me, SunLab Spring processed interrupts
> > in user space. I do not remember for sure, but I think QNX did, too.
> > User mode interrupt handlers are perfectly doable, provided that the
> > hardware allows to mask interrupts selectively.
>
> SGI's IRIX does it too, for graphics card interrupts like "VBLANK" and
> "rendering pipeline FIFO not full anymore".
Sorry, but SGI's IRIX does NOT handle graphics interrupts in user space.
--macko
SGI Graphics Kernel Engineer 1994-1999
next prev parent reply other threads:[~2001-06-21 23:11 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.993156181.18994.linux-kernel2news@redhat.com>
2001-06-21 22:06 ` Pete Zaitcev
2001-06-21 23:40 ` Richard B. Johnson
2001-06-22 0:30 ` Anders Larsen
2001-06-22 0:43 ` Richard B. Johnson
2001-06-25 0:06 ` Anders Larsen
2001-06-21 22:20 ` David S. Miller
2001-06-21 23:09 ` Mike Mackovitch [this message]
2001-06-21 23:22 ` David S. Miller
2001-06-21 23:50 ` Mike Mackovitch
2001-06-22 0:36 ` David S. Miller
2001-06-21 10:41 Balbir Singh
2001-06-21 10:55 ` Tim Waugh
2001-06-21 11:04 ` Alan Cox
2001-06-21 12:43 ` Balbir Singh
2001-06-21 13:27 ` Alan Cox
2001-06-28 22:52 ` Pavel Machek
2001-06-21 12:45 ` Dmitry A. Fedorov
2001-06-21 13:24 ` Oliver Neukum
2001-06-21 14:46 ` Dmitry A. Fedorov
2001-06-21 15:19 ` Oliver Neukum
2001-06-22 4:19 ` Dmitry A. Fedorov
2001-06-22 7:28 ` Balbir Singh
2001-06-21 16:34 ` Abramo Bagnara
2001-06-21 17:27 ` Alan Cox
2001-06-21 19:59 ` Abramo Bagnara
2001-06-21 20:40 ` Richard B. Johnson
2001-06-21 20:54 ` Abramo Bagnara
2001-06-21 21:09 ` Oliver Neukum
2001-06-28 22:57 ` Pavel Machek
2001-06-21 13:28 ` Alan Cox
2001-06-21 14:03 ` Matthias Urlichs
2001-06-28 22:54 ` Pavel Machek
2001-06-21 14:20 ` Dmitry A. Fedorov
2001-06-21 11:38 ` Dmitry A. Fedorov
2001-06-21 13:50 ` john slee
2001-06-21 13:58 ` Matthias Urlichs
2001-06-21 14:21 ` john slee
2001-06-28 22:51 ` Pavel Machek
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