samba - Jul 2007 - Linux CIFS-access problem since samba 3.0.25(a/b)

Hi there,

at first, the following scenario is used in our environment:

Server-Side:
- One Samba PDC using 3.0.24 release with TDB-backend.
- Some Samba member servers serving files, home-dirs, etc.

Client-Side:
- Windows XP-Clients.
- Windows Vista Clients (testing).
- some Linux Ubuntu Distro (Feisty) Clients, using CIFS to access the 
samba-shares.
fstab-entry of the Ubuntu-clients:
//server/share /media/files_on_server cifs 
credentials=/home/user/.smbcredentials,dom=domain,directio,users,noperm,iocharset=utf8,nolock,soft,intr,rsize=8192,wsize=8192
0 0

The problem:
Since using release 3.0.25(a/b) on the samba-member servers,
- accessing the shares by using a Linux Ubuntu Client through CIFS-mount is 
very slow (!!!!). Sometimes you have to wait centuries to get the 
directory-contents.
- accessing the shares by a Windows Client is at normal speed.

After rolling back to 3.0.24 on the samba-member servers:
- accessing the shares by using a Linux Ubuntu Client through CIFS-mount 
work like it should be (normal speed).

What I've found out is:
If we use Samba 3.0.25(a/b) on the member-servers and unset the "msdfs 
root"-parameter from "yes" to "no", the access-speed of
the Ubuntu-Clients
is at normal speed.
Reverting the parameter to "yes" results in the mentioned problem.

Rolling back to 3.0.24 and using "msdfs root = yes" results in NO
problem.

smb.conf on Samba-member server:

[global]
        unix charset = ISO8859-1
        name resolve order = host wins bcast
        display charset = ISO8859-1
        encrypt passwords = yes
        preferred master = no
        domain master = auto
        domain logons = no
        local master = yes
        log level = 1
        os level = 20
        workgroup = DOMAIN
        netbios name = %h
        interfaces = eth0 lo
        server string = %h on SMB %v
        allow hosts = 127.0.0.1 10.0.1.0/24 0.0.0.0/0
        deny hosts = ALL EXCEPT 10.0.1.0/24 127.0.0.1 0.0.0.0/0
        keep alive = 30
        read raw = yes
        write raw = yes
        socket options = SO_KEEPALIVE TCP_NODELAY IPTOS_LOWDELAY 
SO_SNDBUF=8192 SO_RCVBUF=8192
        passdb backend = tdbsam:/etc/samba/private/passdb.tdb
        host msdfs = yes
        msdfs root = yes
        security = domain
        password server = *
        idmap uid = 10000-20000
        idmap gid = 10000-20000
        winbind enum users = yes
        winbind enum groups = yes
        winbind cache time = 100
        template homedir = /home/%U
        load printers = yes
        printing = cups
        printcap = cups
        show add printer wizard = yes
        deadtime = 15
        write cache size = 1048576

[homes]
        path = /home/%S
        comment = %U Home Dir
        browseable = no
        admin users = @"domain\domain admins"
        invalid users = @"domain\domain guests"
        valid users = "domain\%S",@"domain\domain admins"
        writeable = yes
        write list = "domain\%U",@"domain\domain admins"
        guest ok = no
        inherit owner = yes
        inherit permissions = yes
        force user = "domain\%U"
        force group = "domain\domain admins"
        guest ok = no

[Files]
        map acl inherit = yes
        dos filemode = yes
        inherit acls = yes
        inherit permissions = yes
        browseable = yes
        writeable = yes
        guest ok = no
        path = /share-point/files
        comment = FILE01 LV
        vfs objects = recycle
        recycle:repository = SERVER_RECYCLE_BIN
        recycle:keeptree = Yes
        recycle:touch = Yes
        recycle:versions = Yes

[Files-test]
        map acl inherit = yes
        dos filemode = yes
        inherit acls = yes
        inherit permissions = yes
        browseable = yes
        writeable = yes
        guest ok = no
        path = /mnt
        comment = FILE01 backup

[printers]
        comment = Printer
        printable = yes
        guest ok = no
        browseable = yes
        path = /var/spool/samba
        admin users 
[print$]
        comment = Printer Driver Download Area
        write list = @"domain\domain admins"
        guest ok = no
        browseable = yes
        path = /etc/samba/config/printer
        read only = yes
        admin users 
Is there any solution known to solve this problem?

Regards,
Michael

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