From: Greg KH <greg@kroah.com>
To: "linux-os (Dick Johnson)" <linux-os@analogic.com>
Cc: Matthias Schniedermeyer <ms@citd.de>,
Matt Porter <mporter@embeddedalley.com>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [RFC] Simple userspace interface for PCI drivers
Date: Wed, 30 Aug 2006 15:08:56 -0700 [thread overview]
Message-ID: <20060830220855.GA13554@kroah.com> (raw)
In-Reply-To: <Pine.LNX.4.61.0608301707130.26205@chaos.analogic.com>
On Wed, Aug 30, 2006 at 05:25:45PM -0400, linux-os (Dick Johnson) wrote:
> User mode drivers are NOT good. For them to work, too much stuff
> needs to be exposed. Then there is the problem of interrupts.
> You are not going to be able to make an interrupt 'thunker' like
> you could in the old DOS days. The kernel isn't going to call
> user-mode code because nobody is going to provide such a potentially
> destructive interface. If you think you can handle hardware interrupt
> requests with the poll() interface, you are going to be in a world of
> hurt for throughput.
If you feel this way, then don't use them on your system, for your
hardware.
next prev parent reply other threads:[~2006-08-30 22:10 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-30 6:23 [RFC] Simple userspace interface for PCI drivers Greg KH
2006-08-30 10:09 ` Thomas Gleixner
2006-08-30 14:34 ` Matt Porter
2006-08-30 16:25 ` Thomas Gleixner
2006-08-30 17:55 ` Greg KH
2006-08-30 20:32 ` Foli Ayivoh
2006-08-30 21:01 ` Matthias Schniedermeyer
2006-08-30 21:25 ` linux-os (Dick Johnson)
2006-08-30 22:08 ` Greg KH [this message]
2006-09-01 1:36 ` Brice Goglin
2006-09-01 3:22 ` Greg KH
2006-09-01 3:37 ` Brice Goglin
2006-09-01 4:27 ` Greg KH
2006-08-31 13:49 ` Andi Kleen
2006-09-01 18:16 ` Greg KH
2006-08-30 17:07 ` Manu Abraham
2006-08-30 17:52 ` Greg KH
2006-08-30 22:50 ` Manu Abraham
2006-08-31 0:17 ` Greg KH
2006-08-31 13:24 ` Manu Abraham
2006-08-31 22:42 ` Greg KH
2006-08-31 7:40 ` Andrew Morton
2006-08-31 8:05 ` Thomas Gleixner
2006-08-31 8:30 ` Xavier Bestel
2006-08-31 20:39 ` Lee Revell
2006-08-31 20:53 ` Chris Friesen
2006-08-31 21:39 ` Greg KH
2006-08-31 20:58 ` Xavier Bestel
2006-08-31 21:12 ` Lee Revell
2006-08-31 21:18 ` Xavier Bestel
2006-08-31 21:33 ` Manu Abraham
2006-08-31 21:40 ` Greg KH
2006-09-01 21:17 ` Pavel Machek
2006-09-03 8:34 ` Thomas Gleixner
2006-09-12 19:47 ` Sam Ravnborg
2006-09-14 5:57 ` Greg KH
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