[Samba] Slow reply to "smbclient -NL localhost" : strace

[Gilles]

On 05/11/2024 18:16, Michael Tokarev wrote:
> If smbclient were just to run usleep() function, it will
> show exactly the same behavior.
>
> What's happening here, most likely, is that smbclient is
> making some network calls and is waiting for the reply.
>
> It might be a DNS problem or samba (configuration) problem,
> depending on where and what it is waiting for.
>
> And yes, this will be visible in the strace output.
>
>> FWIW, there's no delay after I run it once… but only for a couple of 
>> minutes.
>
> This suggests it might be a name resolution issue. 

What files could help find the source of the problem?

Here's the smb.conf:
===========
[global]
workgroup = WORKGROUP
netbios name = SHEEVAPLUG

security = user
;added, but makes no difference
server role = standalone server

map to guest = Bad User
guest account = www-data

log level = 2

disable netbios = yes
client min protocol = SMB2_02
server min protocol = SMB2_02
smb ports = 445

printcap name = /dev/null
load printers = no
printing = bsd

[nginx]
path = /usr/share/nginx
;comment = No need for Unix/Samba passwords
guest ok = yes
writeable=yes
browseable=yes
create mode = 0644

[sdcard]
path = /mnt/sdcard
guest ok = yes
writeable=yes
browseable=yes
;don't work with vfat fs
;create mode = 0644 ; still -rw-r-xr-x
===========