[Samba] High CPU usage smbd processes and PANIC

[Dante Colo]

Hello 



I recently deployed a Samba 4.0.21 running as classic pdc on freebsd 10 version RELEASE-p9, most of shares are in a ZFS volume with vfs_zfsacl module, some smbd processes stays constantly with around 70% cpu usage sometimes 90% and dies with signal 11 according the log message , i also tried enable debug level 10 but didn't show anything helpful or maybe i wasn't able to understand the entire log, any suggestions ? 



INTERNAL ERROR: Signal 11 in pid 59865 (4.0.21) 
Please read the Trouble-Shooting section of the Samba HOWTO 
[2014/10/10 08:33:08.955295, 0] =============================================================== 
[2014/10/10 08:33:08.955326, 0] PANIC (pid 59865): internal error 
[2014/10/10 08:33:08.957939, 0] BACKTRACE: 7 stack frames: 
#0 0x802b5a921 <log_stack_trace+0x21> at /usr/local/lib/libsmbconf.so.0 
#1 0x802b5a708 <smb_panic_s3+0x98> at /usr/local/lib/libsmbconf.so.0 
#2 0x80146ef25 <smb_panic+0x35> at /usr/local/lib/libsamba-util.so.0 
#3 0x80146f50a <smb_panic+0x61a> at /usr/local/lib/libsamba-util.so.0 
#4 0x80146eee3 <fault_setup+0x73> at /usr/local/lib/libsamba-util.so.0 
#5 0x8044ce40b <_swapcontext+0x15b> at /lib/libthr.so.3 
#6 0x8044cdff3 <sigaction+0x343> at /lib/libthr.so.3 





[global] 

server role = classic primary domain controller 
netbios name = SALAMONE-PDC 
workgroup = SALAMONE 
server string = %L 
os level = 255 
domain logons= yes 
preferred master = yes 
domain master = yes 
wins support = yes 
name resolve order = lmhosts wins host bcast 
max stat cache size = 768 
# 
security = user 

add user script = /home/samba/scripts/smbadduser.sh "%u" 
add machine script = /usr/sbin/pw useradd -g machines -s /sbin/nologin -d /dev/null -c "%u" -n "%u" 
unix password sync = no 
admin users = @smbadmins 
log file = /var/log/samba4/log.%I 
max log size = 4096 


log level = 1 
debug class = yes 
debug prefix timestamp = yes 
syslog = 0 

deadtime=60 

time server = yes 
logon path = 
logon drive = H: 
logon script =%G/logon.bat 
# 
[netlogon] 
path = "/home/samba/netlogon" 
browsable = no 
writable = no 
guest ok = yes 
# 
[homes] 
directory mask = 0700 
create mask = 0700 
browsable = no 
writable = yes 
valid users = %S 
# 

[Diligencias] 
vfs objects = zfsacl,xattr_tdb,full_audit 
xattr_tdb:file = /var/db/samba4/private/shares_xattrs/diligencias.tdb 
full_audit:prefix = "%I|%u|%P" 
full_audit:success = rmdir rename unlink 
full_audit:failure = rmdir rename unlink 
full_audit:facility = LOCAL0 
full_audit:priority = NOTICE 

path = "/samba/salamone/diligencias" 
inherit owner = yes 
inherit permissions = yes 
writable = yes 
browsable = yes 
ea support = yes 
store dos attributes = yes 
case sensitive = yes 
map archive = no 
map system = no 
map readonly = no 
map hidden = no 
level2 oplocks = no 
oplocks = no 
# 



[RH] 
vfs objects =full_audit 
full_audit:prefix = "%I|%u|%P" 
full_audit:success = rmdir rename unlink 
full_audit:failure = rmdir rename unlink 
full_audit:facility = LOCAL0 
full_audit:priority = NOTICE 
#aio read size = 32768 
#aio write size = 32768 
path = "/local_disk_2/salamone/dados_gerais/rh" 
writable = yes 
browsable = yes 
inherit owner = yes 
create mask =0777 
directory mask =0777 
store dos attributes = yes 
ea support = yes 
valid users =@smbadmins,gabriela.martins,leonardo.oliveira,robezia.silva,amanda.zonta,neildes.digesu,jose.salamone,miriam.lucateli,meiriele.oliveira 
case sensitive = yes 
map archive = no 
map system = no 
map readonly = no 
map hidden = no 
level2 oplocks = no 
oplocks = no 
# 

[Eventos] 
vfs objects = zfsacl,xattr_tdb,full_audit 
xattr_tdb:file = /var/db/samba4/private/shares_xattrs/eventos.tdb 
full_audit:prefix = "%I|%u|%P" 
full_audit:success = rmdir rename unlink 
full_audit:failure = rmdir rename unlink 
full_audit:facility = LOCAL0 
full_audit:priority = NOTICE 
#aio read size = 32768 
#aio write size = 32768 
path = "/samba/salamone/eventos" 
writable = yes 
browsable = yes 
inherit owner = yes 
inherit permissions = yes 
store dos attributes = yes 
ea support = yes 
case sensitive = yes 
map archive = no 
map system = no 
map readonly = no 
map hidden = no 
level2 oplocks = no 
oplocks = no 
#