[lkml]   [2001]   [Jun]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Is it useful to support user level drivers
Thanks folks, I got some great comments, pointers a
list of problems which I need to take care of.
I promise that when I try and implement user
level interrupts - it won't be a hack, all problems
will be taken care of based on good programming

I will look into the steps provided by people.
Yes! we need to worry about shared interrupts, I will
draw out a more detailed plan of problems and

Later ...


--- "Dmitry A. Fedorov" <>
> On Thu, 21 Jun 2001, Oliver Neukum wrote:
> > > > In addition, how do you handle shared
> interrupts ?
> > >
> > > It is impossible, see my another message.
> >
> > Which IMHO makes the concept pretty much useless.
> > Interrupt sharing is pretty much the norm today.
> And there is no evidence for
> > this to change in the near future. Rather the
> opposite seems to happen in
> > fact.
> >
> > Which devices were you thinking of, that need a
> hardware IRQ and no kernel
> > driver ?
> An ISA cards, mostly for data acquisition - edge
> triggered interrupts,
> no ack required immediately from interrupt handler.
> Rest of hardware
> handling can be deferred to user space.
> IRQ sharing is possible there in spite of some
> hardware hacking.
> Yes, it is very limited range of hardware today but
> it exists
> and /dev/irq kernel module provide one of generic
> mechanisms for user
> space driver implementation.

Do You Yahoo!?
Get personalized email addresses from Yahoo! Mail
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:17    [W:0.051 / U:1.808 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site