Re: [9fans] 9vx, kproc and *double sleep*

[ron minnich <rminnich@gmail.com>]

On Sat, Jun 12, 2010 at 3:15 PM, Charles Forsyth <forsyth@terzarima.net> wrote:
>>in Linux parlance, Plan 9 is a "preemptible" kernel. Interrupt handlers can be interrupted, so to speak.
>
> interrupt handlers are not normally interruptible during the interrupt
> processing, but rather at the end (eg, when anyhigher, anyready or preempted
> is called).

Yes, I was not careful enough in how I said that.

For those who wonder what I was trying to say, see trap(); note what
happens after the isr() is called and look where preempted() is
called.

But, all this said, the problems we're seeing on 9vx are strangely
similar to the ones I had on Xen when code that was not supposed to be
interrupted got interrupted. There may be no real connection at all
however.

ron