Subject: Re: Proposal for generalized MI soft interrupts
To: Charles M. Hannum <email@example.com>
From: Bill Sommerfeld <firstname.lastname@example.org>
Date: 01/30/1997 10:05:44
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?