On 26-Feb-02 Julian Elischer wrote:
> On Tue, 26 Feb 2002, John Baldwin wrote:
>> My suggestion will be to back it out.  I would rather not have to make said
>> suggestion.  Can you please try to fit this into the existing framework
>> rather
>> than ripping it all up?  We need to finalize and test the design before we
>> hardcode too many assumptions about the implementation into the interface.
>> You
>> have pointed out some issues with the current interface which are valid and
>> I
>> would like to address those, however, there are still changes to the MI
>> implementation that need to go in once it doesn't crash right and left.  If
>> you
>> wish I could commit the code and make current a living hell for everyone,
>> but
>> my ethics don't permit me to test code that I know is broken.
> You know john, I wish you would commit more often and let it break things
> occasionally.
> It's REALLY HARD for anyone else to comment and help if you keep doing on
> P4 which is NOT the  project Souce control system.
> Even with cvsup assistanace, it's just no-where near as convenient as
> having it checked in. And after you HAVE checked it in, others can help
> find and fix problems.. as it is you are "on your own".
> (This is the reason I will shortly check in the KSE diffs on a branch)


Preemptive kernels don't even make it out of single user mode for SMP machines,
ok?  We aren't talking minor breakage here, we are talking _extreme_ breakage. 
If people want to play with it, preempt.patch on freefall is updated via a cron
job every half hour or so.  Unfortunately, however, it's in a limbo atm due to
KSE and needing to sort out how the priorities are going to work.  It will
really be better to let KSE settle into the scheduler first adn then add
preemption to the scheduler itself afterwards.

The reason I'm not pushing preemption into the tree fully (I've already
committed half of the original patch) is that there is other work (proc locking
for example) that gets us more bang for the buck.


John Baldwin <[EMAIL PROTECTED]>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/

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