[Samba] File copy results in 100% CPU load and broken connection
mih at transagent.ru
mih at transagent.ru
Sun Jun 22 10:38:33 MDT 2014
Good day.
There are Samba server, When Windows 7 client copying files from those
server share, smbd process, serving this connection, load his CPU
kernel up to 100% permanently. Some times (not always) file copy progress on
windows client stops with message that share not available . After that windows reconnects
with new connection (new smbd process on samba server), but previous
smbd continuous 100% loads CPU kernel. Is this situation normal?
Additional information:
Samba server:
Debian 7.5 x64
Kernel version 3.2.0-4-amd64 #1 SMP Debian 3.2.57-3+deb7u2 x86_64 GNU/Linux
Samba version (debian package) 3.6.6-6+deb7u3
smb.conf:
[global]
dos charset = CP866
workgroup = TRAZT
server string = %h server
interfaces = lo, bond0
bind interfaces only = Yes
client schannel = Yes
server schannel = Yes
allow trusted domains = No
passwd chat =
restrict anonymous = 1
syslog = -1
log file = /var/log/samba/log.%m
max protocol = SMB2
reset on zero vc = Yes
max xmit = 65536
name resolve order = wins lmhosts host bcast
time server = Yes
unix extensions = No
deadtime = 15
load printers = No
show add printer wizard = No
logon script = scripts\%U.bat
logon path =
logon drive = U:
logon home = \\%L\%U
domain logons = Yes
os level = 65
lm announce = No
preferred master = Yes
domain master = Yes
dns proxy = No
wins support = Yes
async smb echo handler = Yes
multicast dns register = No
idmap config * : backend = tdb
invalid users = root
force unknown acl user = Yes
hosts allow = 127.0.0.1, 192.168.1.0/24
hosts deny = 0.0.0.0/0
aio read size = 16384
aio write size = 16384
strict allocate = Yes
use sendfile = Yes
hide special files = Yes
map archive = No
browseable = No
access based share enum = Yes
csc policy = disable
follow symlinks = No
dont descend = /proc,/dev
log level = 1
[homes]
comment = Home Directories
valid users = %S
read only = No
create mask = 0600
directory mask = 0700
[netlogon]
comment = Network Logon Service
path = /var/lib/samba/netlogon
write list = "+TRAZT\Domain Admins"
guest ok = Yes
[AztZik]
path = /mnt/work/aztzik
valid users = +aztzikusers
force group = aztzikusers
read only = No
create mask = 0660
directory mask = 0770
Windows client: Windows 7 x64 Professional SP1 + all actual windows updates
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