Shared Mem Errors

Tue Feb 13 13:43:16 GMT 2001

I have recently installed Samba for the first time. My server is a Dell
PowerEdge 300 running Mandrake Linux 7.2. I installed Samba from the
Mandrake CD and upgraded the RPMs from the Mandrake update site. My client
computers are Windows 2000 Professional computers. 

I believe that I have correctly configured Samba, as I have been able to
get files from all three of my client computers. My smb.conf settings
follow below (leaving out most comments and settings related to printing):

#======================= Global Settings
=====================================
[global]

   workgroup = HEADWATERS
   server string = Samba Server %v
   hosts allow = 192.168. 127.

    printcap name = lpstat
    load printers = yes

    printing = cups
    log file = /var/log/samba/log.%m
    max log size = 250
    security = user
    socket options = TCP_NODELAY
    dns proxy = no
    unix password sync = yes
    passwd program = /usr/bin/passwd %u
    passwd chat = *New*UNIX*password* %n\n *ReType*new*UNIX*password* %n\n
*passwd:*all*authentication*tokens*updated*successfully*
    netbios name = CHURCHILL
    encrypt passwords = yes
    smb passwd file = /etc/smbpasswd
    map to guest = never
    password level = 8
    null passwords = no
    os level = 65
    local master = yes
    preferred master = yes
    domain master = yes
    wins support = yes
    name resolve order = wins lmhosts
    interfaces = eth0
    shared mem size = 5242880
    dead time = 0
    debug level = 4

   preserve case = yes
   short preserve case = yes
   default case = lower
   case sensitive = no

#============================ Share Definitions
==============================
[homes]
    comment = Home Directories
    browseable = no
    writable = yes

[public]
    comment = Headwaters Staff Files
    path = /home/public
    public = yes
    writeable = yes
    printable = no
    browseable = yes

[Bryan]
    comment = Bryan's Staff Files
    path = /home/public/Bryan
    writeable = yes
    printable = no
    browseable = yes

#== FINISH SETTINGS==

However, I have experienced a strange problem where only one computer could
log in at a time. Other computers would not be able to browse the network
at all. After some digging and running diagnostics, I have concluded that
the problem is with the shared memory accesses. My smb.log file
(diagnostics level 3) follows:

[2001/02/13 07:01:43, 1] smbd/server.c:main(641)
  smbd version 2.0.7 started.
  Copyright Andrew Tridgell 1992-1998
  doing parameter preserve case = yes
  doing parameter short preserve case = yes
  doing parameter default case = lower
  doing parameter case sensitive = no
[2001/02/13 07:01:43, 2] param/loadparm.c:do_section(2481)
  Processing section "[homes]"
  doing parameter comment = Home Directories
  doing parameter browseable = no
  doing parameter writable = yes
[2001/02/13 07:01:43, 2] param/loadparm.c:do_section(2481)
  Processing section "[public]"
  doing parameter comment = Headwaters Staff Files
  doing parameter path = /home/public
  doing parameter public = yes
  doing parameter writeable = yes
  doing parameter printable = no
  doing parameter browseable = yes
[2001/02/13 07:01:43, 2] param/loadparm.c:do_section(2481)
  Processing section "[Nelson]"
  doing parameter comment = Nelson's Staff Files
  doing parameter path = /home/public/Randy/Smart Communities/Nelson
  doing parameter writeable = yes
  doing parameter printable = no
  doing parameter browseable = yes
[2001/02/13 07:01:43, 2] param/loadparm.c:do_section(2481)
  Processing section "[Bryan]"
  doing parameter comment = Bryan's Staff Files
  doing parameter path = /home/public/Bryan
  doing parameter writeable = yes
  doing parameter printable = no
  doing parameter browseable = yes
[2001/02/13 07:01:43, 2] param/loadparm.c:do_section(2481)
  Processing section "[Randy]"
  doing parameter comment = Randy's Staff Files
  doing parameter path = /home/public/Randy
  doing parameter writeable = yes
  doing parameter printable = no
  doing parameter browseable = yes
[2001/02/13 07:01:43, 2] param/loadparm.c:do_section(2481)
  Processing section "[Raeann]"
  doing parameter comment = Raeann's Staff Files
  doing parameter path = /home/public/Raeann
  doing parameter writeable = yes
  doing parameter printable = no
  doing parameter browseable = yes
[2001/02/13 07:01:43, 2] param/loadparm.c:do_section(2481)
  Processing section "[websites]"
  doing parameter comment = KCDC Web sites
  doing parameter path = /home/websites
  doing parameter public = yes
  doing parameter writeable = yes
  doing parameter printable = no
  doing parameter browseable = yes
[2001/02/13 07:01:43, 2] param/loadparm.c:do_section(2481)
  Processing section "[printers]"
  doing parameter comment = All Printers
  doing parameter path = /var/spool/samba
  doing parameter browseable = yes
  doing parameter guest ok = yes
  doing parameter writable = no
  doing parameter printable = yes
  doing parameter create mode = 0700
  doing parameter print command = lpr-cups -P %p %s # using cups own
drivers (use generic PostScript on clients).
  doing parameter lpq command = lpstat -o %p
  doing parameter lprm command = cancel %p-%j
[2001/02/13 07:01:43, 3] param/loadparm.c:lp_load(2805)
  pm_process() returned Yes
[2001/02/13 07:01:43, 3] param/loadparm.c:lp_add_ipc(1594)
  adding IPC service
[2001/02/13 07:01:43, 2] lib/interface.c:add_interface(83)
  added interface ip=192.168.0.1 bcast=192.168.0.255 nmask=255.255.255.0
[2001/02/13 07:01:43, 1] smbd/files.c:file_init(216)
  file_init: Information only: requested 10000 open files, 1014 are
available.
[2001/02/13 07:01:43, 3] smbd/server.c:main(704)
  loaded services
[2001/02/13 07:01:43, 3] smbd/server.c:main(712)
  Becoming a daemon.
[2001/02/13 07:01:43, 3] lib/util_sock.c:open_socket_in(875)
  bind succeeded on port 139
[2001/02/13 07:01:43, 2] smbd/server.c:open_sockets(181)
  waiting for a connection
[2001/02/13 07:02:02, 4] locking/shmem_sysv.c:sysv_shm_open(547)
  Trying sysv shmem open of size 5242880
[2001/02/13 07:02:02, 3] locking/shmem_sysv.c:sysv_shm_open(707)
  Initialised IPC area of size 5242880
[2001/02/13 07:02:02, 2] smbd/server.c:main(746)
  Changed root to /
[2001/02/13 07:02:02, 3] smbd/oplock.c:open_oplock_ipc(86)
  open_oplock_ipc: opening loopback UDP socket.
[2001/02/13 07:02:02, 3] lib/util_sock.c:open_socket_in(875)
  bind succeeded on port 0
[2001/02/13 07:02:02, 3] smbd/oplock.c:open_oplock_ipc(114)
  open_oplock ipc: pid = 10225, global_oplock_port = 1298
[2001/02/13 07:02:02, 4] lib/time.c:TimeInit(110)
  Serverzone is 0
[2001/02/13 07:02:02, 1] lib/util_sock.c:client_name(1007)
  Gethostbyaddr failed for 192.168.0.53
[2001/02/13 07:02:02, 2] lib/access.c:check_access(258)
  Allowed connection from 192.168.0.53 (192.168.0.53)
[2001/02/13 07:02:02, 3] smbd/process.c:process_smb(618)
  Transaction 0 of length 72
[2001/02/13 07:02:02, 2] smbd/reply.c:reply_special(97)
  netbios connect: name1=CHURCHILL        name2=RECEPTION      
[2001/02/13 07:02:22, 4] locking/shmem_sysv.c:sysv_shm_open(547)
  Trying sysv shmem open of size 5242880
[2001/02/13 07:02:22, 2] smbd/server.c:main(746)
  Changed root to /
[2001/02/13 07:02:22, 3] smbd/oplock.c:open_oplock_ipc(86)
  open_oplock_ipc: opening loopback UDP socket.
[2001/02/13 07:02:22, 3] lib/util_sock.c:open_socket_in(875)
  bind succeeded on port 0
[2001/02/13 07:02:22, 3] smbd/oplock.c:open_oplock_ipc(114)
  open_oplock ipc: pid = 10227, global_oplock_port = 1299
[2001/02/13 07:02:22, 4] lib/time.c:TimeInit(110)
  Serverzone is 0
[2001/02/13 07:02:22, 1] lib/util_sock.c:client_name(1007)
  Gethostbyaddr failed for 192.168.0.51
[2001/02/13 07:02:22, 2] lib/access.c:check_access(258)
  Allowed connection from 192.168.0.51 (192.168.0.51)
[2001/02/13 07:02:22, 3] smbd/process.c:process_smb(618)
  Transaction 0 of length 72
[2001/02/13 07:02:22, 2] smbd/reply.c:reply_special(97)
  netbios connect: name1=CHURCHILL        name2=MANAGER        
[2001/02/13 07:02:54, 4] locking/shmem_sysv.c:sysv_shm_open(547)
  Trying sysv shmem open of size 5242880
[2001/02/13 07:02:54, 2] smbd/server.c:main(746)
  Changed root to /
[2001/02/13 07:02:54, 3] smbd/oplock.c:open_oplock_ipc(86)
  open_oplock_ipc: opening loopback UDP socket.
[2001/02/13 07:02:54, 3] lib/util_sock.c:open_socket_in(875)
  bind succeeded on port 0
[2001/02/13 07:02:54, 3] smbd/oplock.c:open_oplock_ipc(114)
  open_oplock ipc: pid = 10228, global_oplock_port = 1300
[2001/02/13 07:02:54, 4] lib/time.c:TimeInit(110)
  Serverzone is 0
[2001/02/13 07:02:54, 1] lib/util_sock.c:client_name(1007)
  Gethostbyaddr failed for 192.168.0.249
[2001/02/13 07:02:54, 2] lib/access.c:check_access(258)
  Allowed connection from 192.168.0.249 (192.168.0.249)
[2001/02/13 07:02:54, 3] smbd/process.c:process_smb(618)
  Transaction 0 of length 72
[2001/02/13 07:02:54, 2] smbd/reply.c:reply_special(97)
  netbios connect: name1=CHURCHILL        name2=TECH1          
[2001/02/13 07:03:13, 4] locking/shmem_sysv.c:sysv_shm_open(547)
  Trying sysv shmem open of size 5242880
[2001/02/13 07:03:13, 2] smbd/server.c:main(746)
  Changed root to /
[2001/02/13 07:03:13, 3] smbd/oplock.c:open_oplock_ipc(86)
  open_oplock_ipc: opening loopback UDP socket.
[2001/02/13 07:03:13, 3] lib/util_sock.c:open_socket_in(875)
  bind succeeded on port 0
[2001/02/13 07:03:13, 3] smbd/oplock.c:open_oplock_ipc(114)
  open_oplock ipc: pid = 10234, global_oplock_port = 1301
[2001/02/13 07:03:13, 4] lib/time.c:TimeInit(110)
  Serverzone is 0
[2001/02/13 07:03:13, 1] lib/util_sock.c:client_name(1007)
  Gethostbyaddr failed for 192.168.0.250
[2001/02/13 07:03:13, 2] lib/access.c:check_access(258)
  Allowed connection from 192.168.0.250 (192.168.0.250)
[2001/02/13 07:03:13, 3] smbd/process.c:process_smb(618)
  Transaction 0 of length 72
[2001/02/13 07:03:13, 2] smbd/reply.c:reply_special(97)
  netbios connect: name1=CHURCHILL        name2=EMACHINES      
[2001/02/13 07:03:15, 4] locking/shmem_sysv.c:sysv_shm_open(547)
  Trying sysv shmem open of size 5242880
[2001/02/13 07:03:15, 0] locking/shmem_sysv.c:sysv_shm_open(667)
  Can't create or use IPC area. Error was File exists
[2001/02/13 07:03:15, 0] locking/locking.c:locking_init(174)
  ERROR: Failed to initialise share modes
[2001/02/13 07:03:15, 4] locking/shmem_sysv.c:sysv_shm_open(547)
  Trying sysv shmem open of size 5242880
[2001/02/13 07:03:15, 0] locking/shmem_sysv.c:sysv_shm_open(667)
  Can't create or use IPC area. Error was File exists
[2001/02/13 07:03:15, 0] locking/locking.c:locking_init(174)
  ERROR: Failed to initialise share modes
[2001/02/13 07:03:21, 4] locking/shmem_sysv.c:sysv_shm_open(547)
  Trying sysv shmem open of size 5242880
[2001/02/13 07:03:21, 0] locking/shmem_sysv.c:sysv_shm_open(667)
  Can't create or use IPC area. Error was File exists
[2001/02/13 07:03:21, 0] locking/locking.c:locking_init(174)
  ERROR: Failed to initialise share modes
[2001/02/13 07:03:21, 4] locking/shmem_sysv.c:sysv_shm_open(547)
  Trying sysv shmem open of size 5242880
[2001/02/13 07:03:21, 0] locking/shmem_sysv.c:sysv_shm_open(667)
  Can't create or use IPC area. Error was File exists
[2001/02/13 07:03:21, 0] locking/locking.c:locking_init(174)
  ERROR: Failed to initialise share modes

My questions are:

1. Is this a problem with the program, or with the RPM compilation of the
program?
2. Increasing the shared mem size from 1 mb to 5 mb alleviated the problem
somewhat. With 1 mb, I could only connect 1 computer before subsequent
connections failed. With 5 mb, I got up to 3 computers before the fourth
connection failed. What is a reasonable shared mem size? The man file says
"Set to 5 mb for a large number of files". If I can only support 3
computers with 5 mb, how much should I be allocating to scale up to 10
computers (or more)?

Any advice would be most appreciated.

Bryan Orthner
Technical Coordinator
Keewatin Career Development Corporation