Re: devfs vs udev/hotplug

[Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>]

    I wasn't even thinking of a userland file server.  I was simply thinking
    of a userland demon which creates and destroys CHR special files based
    on instructions from the kernel.

    Devices are not created and destroyed all that often, so performance 
    isn't really an issue.

					-Matt
					Matthew Dillon 
					<dillon@xxxxxxxxxxxxx>

:> Doesn't this sort of design imply that the kernel is instructing a daemon
:> to make kernel calls to service the requests?  Isn't that a lot of 
:> address space crossing or do I not understand how a userland file "server"
:> would work?  I realize that this will be done with fast messages but such
:> designs leave me with "speed" doubts.  This might be a bad example for when
:> that speed matters though.
:> 
:> Dave
:
:	I don't think speed will be much of an issue, once Async
:	messaging and a Shared Memory Segment between userland and
:	kernel is implemented.  One can utilize that.
:
:	Regards,
:
:		-Hiten