From owner-freebsd-arch@FreeBSD.ORG  Wed Apr 30 08:18:33 2003
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To: Andrew Gallatin <gallatin@cs.duke.edu>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Wed, 30 Apr 2003 11:11:46 EDT."
             <16047.59314.532227.475952@grasshopper.cs.duke.edu> 
Date: Wed, 30 Apr 2003 17:18:25 +0200
Message-ID: <8764.1051715905@critter.freebsd.dk>
cc: freebsd-arch@freebsd.org
Subject: Re: lots of malloc(M_WAITOK)'s in interrupt context from camisr 
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In message <16047.59314.532227.475952@grasshopper.cs.duke.edu>, Andrew Gallatin
 writes:
>
>John Baldwin writes:
>
> > If you need to do more work in your interrupt routine than just wakeups
> > and dinking with registers, you can always wake up a software interrupt
> > handler or some other random kthread to do things that take a long amount
>
>Dumb question: Exactly what is one allowed to do in an INTR_FAST
>interrupt context?  Obviously, you can't sleep.  But can you call
>wakeup()?

Calling wakeup() is just about it, but we should actually define it
more precisely in a suitable man-page.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.