Matthew Dillon dillon at
Thu Jun 2 11:11:56 PDT 2005

:Let me find a different way for the first step. I want to measure (and feel)
:the system before the change all of the tree. I have an idea how I can
:detect the spl() abuse (which has to be fixed anyway) and how we can
:replace the rest of the spls with critical sections to investigate the
:effect. The second step becomes mostly mechanical and I want to write
:a script to handle that first. Give me a few days to get it sorted out,
:since I also have to learn for a written exam on Monday :)
:This is not so much about whether the change is good or bad, but about
:*rushing* it in without thinking about the results first. We are not
:Linux afterall.

    No.  This is not going to be delayed.  I am doing this now.  If you 
    want to add statistics to the interrupt vector code to track the number
    of interrupts due to spl and/or critical sections that's just fine,
    you can compare a before and after system.  But we are moving forward
    on this because it is something that has to be done no matter how you
    twist it.

					Matthew Dillon 
					<dillon at xxxxxxxxxxxxx>

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