Hi, I have a question regarding the use of XIO's. It seems that XIO's let a thread without process context read another processes's user buffer (which should be very handy), but there doesn't seem to be a way for that thread to write back into the process's address space, unless that process happens to be switched in and we use copyout() the old fashioned way.
How would a new-style device driver or filesystem implement READ for a user process from within its own thread? Thanks, Eric
