am-utils or kernel bug ?

[Nicolas Turro]

hi, 

i am running Redhat 9.0 ( kernel 2.4.20 )
and am-utils (am-utils-6.0.9-2)  (because i need the browsing feature
that automount doen't support).

Unfortunatelly, amd sometimes hangs at boot time during its
initialization (/etc/rc.d/init.d/amd ).
I can reproduce this bug with /etc/rc.d/init.d/amd start / stop 
sequences, sometimes the start hangs sometimes it works.
This bug occurs on ALL RedHat 9.0 boxes we have (7 PC with totally
different hardware).

When hanging i can observe the following processes :

root      2444  1911  0 17:14 pts/0    00:00:00 /bin/bash
/etc/rc.d/init.d/amd start
root      2453  2444  0 17:14 pts/0    00:00:00 initlog -q -c
/usr/sbin/amd -F /etc/amd.conf
root      2454  2453  0 17:14 pts/0    00:00:00 /usr/sbin/amd -F
/etc/amd.conf
root      2455  2454  0 17:14 ?        00:00:00 /usr/sbin/amd -F
/etc/amd.conf

with the following traces :

[root@redhat-serv root]# strace -p 2453
wait4(2454, 0xbfffd9cc, WNOHANG, NULL)  = 0
nanosleep({0, 500000}, NULL)            = 0
poll([{fd=3, events=POLLIN|POLLPRI}, {fd=5, events=POLLIN|POLLPRI}], 2,
500) = 0
wait4(2454, 0xbfffd9cc, WNOHANG, NULL)  = 0
nanosleep({0, 500000}, NULL)            = 0
poll([{fd=3, events=POLLIN|POLLPRI}, {fd=5, events=POLLIN|POLLPRI}], 2,
500) = 0
wait4(2454, 0xbfffd9cc, WNOHANG, NULL)  = 0
nanosleep({0, 500000}, NULL)            = 0
poll([{fd=3, events=POLLIN|POLLPRI}, {fd=5, events=POLLIN|POLLPRI}], 2,
500) = 0
wait4(2454, 0xbfffd9cc, WNOHANG, NULL)  = 0
nanosleep({0, 500000}, NULL)            = 0
poll( <unfinished ...>

[root@redhat-serv root]# strace -p 2454
futex(0x4212e1c8, FUTEX_WAIT, -2, NULL <unfinished ...>

[root@redhat-serv root]# strace -p 2455
select(1024, [4 5 6 7], NULL, NULL, {932, 980000} <unfinished ...>

The SAME configuration worked perfectly with RH 8.0, am-utils-6.0.7-9,
kernel 2.4.18

Any suggestions ?

-- 
Nicolas Turro <[e-mail]>
INRIA