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Re: 2.1.131 strikes back!

To: Harald Koerfgen <>,
Subject: Re: 2.1.131 strikes back!
Date: Wed, 20 Jan 1999 01:49:53 +0100
In-reply-to: <>; from Harald Koerfgen on Tue, Jan 19, 1999 at 11:54:08PM +0100
References: <> <>
On Tue, Jan 19, 1999 at 11:54:08PM +0100, Harald Koerfgen wrote:

> Well, you were right, Ralf, it doesn't make a difference. A simple test
> showed that the behaviour on the serial console line didn't change. Bang
> again. At least my test lead me into the right direction: the serial device
> drivers was (and still is) in badly need for some polishing.
> Applying the attached patch seems to change everything to normal,
> including the slowed down init :-(. On the other hand, if such little
> changes affect the speed of init I would consider the zs serial device
> driver as scrap. Any volunteers? <evil grin>

How bad is the interrupt overhead for serial interfaces on the R3000?  I've
got some ideas how to tune that part.


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