Typical kfreebsd-amd64 experimental system, kernel =
kfreebsd-image-8.2-1-amd64 8.2-1.1. When I try to run
"pstree -a", I get:
$ pstree -a
/proc/19/cmdline: Bad address
Indeed:
$ ps 19
PID TTY STAT TIME COMMAND
19 ? S+ 0:00 [flowcleaner]
$ cat /proc/19/cmdline
cat: /proc/19/cmdline: Bad address
By contrast, getting the commandline from ordinary processes
works okay:
It is upstream regression w.r.t 8.1 kernel.
Seems be due to
http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/compat/linprocfs/linprocfs.c.diff?r1=1.152;r2=1.153;f=h
The FreeBSD kernel 8.1 returns process name,
the linux kernel returns empty string for kernel-only processes.
The kernel-only processes shoudl be handled specially,
the fix should go also for "environ".
Petr
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