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Date: Sat, 31 Jan 2004 22:45:32 -0800 (PST)
From: Don Lewis <truckman@FreeBSD.org>
To: bde@zeta.org.au
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Subject: Re: cvs commit: src/sys/kern sched_4bsd.c
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On  1 Feb, Bruce Evans wrote:
> On Sat, 31 Jan 2004, Don Lewis wrote:

>> I was suprised to find that processes in disk wait are no longer counted
>> towards the load average.  This happened in rev 1.163 of kern_synch.c,
>> which  was committed more than two years ago.
>>
>> Even if CPU time is available, a machine with a lot of processes stuck
>> in disk wait is going to feel slow ...
> 
> They were never counted AFAIK.  Isn't this one of the main visible
> differences between BSD and Linux?

I think SunOS 4.x also counts this.

> Rev.1.163 ov kern_synch.c just moved
> stuff.  The change before this in rev.1.59 of vm_meter.c is more likely
> to have changed this but was supposed to just remove dead code.

Yup, I missed the change in 1.59.  I did a binary search to find the
version in vm_meter.c and found a slightly older version before the
SSLEEP code had been removed.