Date: Thu, 19 Jan 2006 22:22:40 +0100 From: "Joerg Lehners" <Joerg.Lehners@Informatik.Uni-Oldenburg.DE> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/92023: kernel 'options DEVICE_POLLING' makes loadavg wrong Message-ID: <E1EzhEu-000GHh-00@gneedle.Informatik.Uni-Oldenburg.DE> Resent-Message-ID: <200601192130.k0JLU5xO029971@freefall.freebsd.org>
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>Number: 92023
>Category: kern
>Synopsis: kernel 'options DEVICE_POLLING' makes loadavg wrong
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Jan 19 21:30:04 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator: Joerg Lehners
>Release: FreeBSD 6.0-STABLE i386
>Organization:
ARBI, Dept. Informatik, Fk II, University of Oldenburg
>Environment:
FreeBSD testido2 6.0-STABLE FreeBSD 6.0-STABLE #2: Thu Jan 19 22:05:47 MET 2006 root@testido2:/usr/src/sys/i386/compile/JL-TESTIDO2 i386
Joe Avgs i386 PC with 6.0-STABLE as of 12. January 2006
>Description:
Add the line
options DEVICE_POLLING
to the kernel config file, compile and boot this kernel,
start one program like 'main () { while (1) { } }' on the otherwise
idle machine and watch the load avg. climbing above 1 and eventually
reaching 2.
For the counter test remove the options DEVICE_POLLING line
and watch the load avg. reaching 1 for the same test.
>How-To-Repeat:
See above
>Fix:
Don't know, I'm no kernel hacker yet.
>Release-Note:
>Audit-Trail:
>Unformatted:
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