Date: Sun, 20 Feb 2005 16:42:51 +1100 From: Peter Jeremy <PeterJeremy@optushome.com.au> To: freebsd-hackers@freebsd.org Subject: Signalling a process from a INTR_FAST handler Message-ID: <20050220054251.GB28983@cirb503493.alcatel.com.au>
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I have a hardware interrupt handler that has to forward a signal to
userland and that I'd like to mark INTR_FAST. AFAIK, the normal way
to forward a signal is:
if ((p = pfind(sc->pid_to_signal)) != NULL) {
psignal(p, SIGUSR2);
PROC_UNLOCK(p);
}
But pfind(9) does a PROC_LOCK() which implies it can sleep and therefore
can't be used by an INTR_FAST handler.
Firstly, am I correct? If so, is there an alternative approach I can use?
--
Peter Jeremy
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