misc/149587: Lockup on 8.1-RC2 system enabling vm.idlezero

Venkatesh Srinivas me at endeavour.zapto.org
Thu Aug 12 19:20:04 UTC 2010

>Number:         149587
>Category:       misc
>Synopsis:       Lockup on 8.1-RC2 system enabling vm.idlezero
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Aug 12 19:20:03 UTC 2010
>Originator:     Venkatesh Srinivas
>Release:        8.1-RC2
FreeBSD manticore.acm.jhu.edu 8.1-RC2 FreeBSD 8.1-RC2 #3 r209893M: Fri Jul 16 16:00:49 EDT 2010     root at manticore.acm.jhu.edu:/usr/obj/usr/local/ncvs/src/sys/DTRACE  amd64

Enabling vm.idlezero_enable results in a system lockup a short time later. Problem also witnessed on 8.0-RELEASE; we are unable to drop to ddb on lockup.
sysctl vm.idlezero_enable=1


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