Re: Attempted summary of "RT patch acceptance" thread, take 2

[Daniel Walker <dwalker@mvista.com>]

On Mon, 2005-07-11 at 09:43 -0700, Paul E. McKenney wrote:
> Hello, Daniel,
> 
> In principle, one could inspect the Linux kernel with the PREEMPT_RT patch
> applied, and calculate the worst-case time during which interrupts are
> disabled, though I have not heard of anyone actually doing this.  Is this
> what you are getting at, or are you thinking in terms of Kristian's and
> Karim's testing?

Well with the PREEMPT_RT patch applied the interrupt off sections are
reduced to a small number, ~100 irrespective of config options or
drivers (although I think APM might be the one exception) .

So with the patch applied it becomes trivial to test/inspect each of the
interrupt off sections , and thus give a hard guarantee for _all_
PREEMPT_RT kernels. 

Daniel

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