Subject: Re: Proposal for generalized MI soft interrupts
To: Bill Sommerfeld <email@example.com>
From: Charles M. Hannum <firstname.lastname@example.org>
Date: 01/30/1997 14:44:30
Bill Sommerfeld <email@example.com> writes:
> Soft interrupts are used as callbacks for hard interrupts. Since a
> soft interrupt is always registered from a hard interrupt routine,
> it is always blocked at the time it is registered.
> What about cases where one soft interrupt needs to trigger another
> soft interrupt? For example: when running from IPL_SOFTSERIAL, you
> call the ppp line discipline, and it needs to post an IPL_SOFTNET?
I hadn't thought of that case, but IPL_SOFTSERIAL needs to be `higher'
than IPL_SOFTNET anyway.