[prev in list] [next in list] [prev in thread] [next in thread] 

List:       netbsd-tech-kern
Subject:    Re: understanding spl levels
From:       "Hubert Feyrer" <hubert.feyrer () informatik ! fh-regensburg ! de>
Date:       2004-03-29 20:10:57
Message-ID: Pine.GSO.4.53.0403292210330.23683 () rfhpc8320
[Download RAW message or body]

On Mon, 29 Mar 2004, Charles M. Hannum wrote:
> It's not quite that simple.  splsoftnet() is used for some of the "lower half"
> of network drivers as well, in places where it's not necessary to block
> hardware interrupts.
>
> I made this change back in... 1994 or 1995?  Before that, most of this work
> was done at splimp(), which blocks almost everything.  In particular, it was
> blocking the "lower half" of tty drivers and causing severe performance
> problems for tty-based protocols on many systems.

So um... should we put anything of this into spl.9? If so, what?


 - Hubert

-- 
Hubert Feyrer <hubert@feyrer.de>
[prev in list] [next in list] [prev in thread] [next in thread]