From mboxrd@z Thu Jan  1 00:00:00 1970
From: helbig@Informatik.BA-Stuttgart.DE (Wolfgang Helbig)
Date: Sun, 15 Dec 2002 10:52:22 +0100 (MET)
Subject: [TUHS] re: Raise of interrupt level necessary
Message-ID: <200212151154.gBFBsdb02344@bsd.korb>

>Date: Sat, 14 Dec 2002 15:27:40 -0800

Michael Davidson wrote:
>If you think that the "rule" is "no ISR can touch user space while
>interrupting a kernel process", then it is display() that breaks
>the rule.

The point is, that this rule leads to somewhat simpler and therefore
better code -- breaking the rule calls for some justification.
Calling display() from the clock-ISR is the only place where an ISR does
not conform to this rule.


Greetings

Wolfgang Helbig