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Message-ID: <6b5347dc050827085727df49c8@mail.gmail.com>
Date: Sat, 27 Aug 2005 23:57:42 +0800
From: "Sat." <walking.to.remember@gmail.com>
To: Christopher Friesen <cfriesen@nortel.com>
Subject: Re: when or where can the case occur in "linux kernel development " about "kernel preemption"?
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <430F45F8.8020505@nortel.com>
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2005/8/27, Christopher Friesen <cfriesen@nortel.com>:
> Sat. wrote:
> > the case about kernel preemption as follow :
> >
> > the book said "when a process that has a higher priority than the
> > currenty running process is awakened ".
> >
> > but I can think about when such case can occur , could you give me an example ?
> 
> There may be others, but one common case is when a hardware interrupt
> causes the higher priority process to become runnable.  Some examples of
> this would be a network packet arriving, or the expiry of a hardware timer.
> 
> Chris
> 

unfortunately, I cannot agree with you , normally ,when the kernel
runs in interrupt context , the schedule() should not be invoked 
------my views .

then,could anyone  give me a definite example about network like above
or anything else to eluminate  this , ok?

thanks !

-- 
Sat.