Re: [patch] fix the softlockup watchdog to actually work

[Jeremy Fitzhardinge]

Ingo Molnar wrote:
>> How reliable does it need to be?  All we need is to measure "about 10 
>> seconds"; if we can't get that out of it, how can it be good for 
>> anything else?
>>     
>
> sched_clock(), as its name suggests it, is meant for the scheduler's 
> use. The scheduler generally only needs to measure time when the CPU is 
> busy - not across idle periods. So sched_clock() can (and will) break 
> across certain types of ACPI idle methods.
>   

Doesn't that mean it will mis-measure process idle times?  Is that a
problem?

    J
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