Re: Adding PCMCIA support to the kernel tree -- developers needed.

[Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>]

On Dienstag,  6. Februar 2001 16:35, David Woodhouse wrote:
> Oliver.Neukum@lrz.uni-muenchen.de said:
> > You'd loose the defined order of events. The result wouldn't even be
> > deterministic.
>
> There is no defined order of events in the current scheme. Do not make the
> mistake of thinking that there is, just because it happens to look that way
> most of the time.

That is unfortunately true. And it _is_ a bug.
The original design had definite order. That was not a nice addition, it was 
a necessity. You cannot get stable behaviour unless you guarantee that the 
scripts don't race with each other.
The approach with a user space demon solves a part of this problem, but not 
all parts.
User space needs to acknowledge that it is finished dealing with one event
_before_ the next event is pumped to user space _and_ before the device
the event refers to is accessable from user space. That's the only way to
get security if device nodes can be reused.

	Regards
		Oliver


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