kern/38965: tracing locking issue

[christos%zoulas.com@localhost]

>Number:         38965
>Category:       kern
>Synopsis:       tracing locking issue
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jun 16 23:35:00 +0000 2008
>Originator:     Christos Zoulas
>Release:        NetBSD 4.99.64
>Organization:
        Trying, Inc.
>Environment:
System: NetBSD shiny.astron.com 4.99.64 NetBSD 4.99.64 (SHINY) #160: Sun Jun 1 
18:01:37 EDT 2008 
christos%shiny.astron.com@localhost:/usr/src/sys/arch/i386/compile/SHINY i386
Architecture: i386
Machine: i386
>Description:
        Tracing has locking problems.
        Also strace has stopped working since proc_stop() does not
        appear to stop the process anymore
>How-To-Repeat:
        compile strace from pkgsrc and run 'ktrace strace /bin/ls'
>Fix: