[Samba] Problem copying large file from Win2K box to Samba share on Linux box

[Jason Bird]

I've got an aggravating problem as described in the subject line above.

I have a small home network with a Linux box running Samba and acting as both 
local and domain master browser and WINS server.  Also on the network are a 
desktop PC (Dell 1.4 GHz P4) running Windows 2000 Professional and a laptop 
running Windows XP Professional.

The problem occurs when I try to copy a file over 1 MB in size from my win2k 
box to a share on the linux box.  Ftp works fine.  It also works when I'm on 
the linux box and copy the same file from a Windows share on the win2k box.  I 
don't see the problem on the XP laptop at all.

The behavior I'm seeing is that the first 1 to 1.5 MB of the file copy happens 
instantly at which point the copy slows to a crawl.  After setting the smb log 
level to 9 or 10 I can see that, after the initial burst of copying, only 1 kb 
is being copied every 5 seconds.

I've looked everywhere for answers and tried the following without success:

1) updating my NIC drivers to the latest
2) changing my NIC config from auto-negotiate to 100Mb-Full Duplex
3) changing my socket options in smb.conf
4) adding the SzReqBuf=65536 key/value to the lanmanserver/parameters key in 
the registry
5) trying different file names to rule out any funky 8.3 problems
6) I shut down firewalls on both computers for the duration so they're not a 
factor

I'd really appreciate some help if anyone has any ideas.  Copies of my smb.conf 
as well as logfiles from a bad copy attempt (from the win2k box) and a good 
copy attempt (from the xp laptop) can be found at 
http://www.birdfam.com/downloads

>From bad_copy.log I see the following log messages every time a block is 
written to the file - these log messages do not appear in the logfile when 
copying from the xp laptop.

[2004/10/16 22:31:39, 10] smbd/process.c:async_processing(282)
  async_processing: Doing async processing.
[2004/10/16 22:31:39, 5] smbd/oplock.c:receive_local_message(107)
  receive_local_message: doing select with timeout of 1 ms
[2004/10/16 22:31:39, 3] smbd/notify_kernel.c:kernel_check_notify(99)
  kernel_check_notify: kernel change notify on . fd[0]=28 (signals_received=2)
[2004/10/16 22:31:39, 10] smbd/notify.c:process_pending_change_notify_queue(161)
  process_pending_change_notify_queue: dir . changed !
[2004/10/16 22:31:39, 3] smbd/error.c:error_packet(105)
  error string = Interrupted system call
[2004/10/16 22:31:39, 3] smbd/error.c:error_packet(129)
  error packet at smbd/notify.c(55) cmd=160 (SMBnttrans) NT code 0x0000010c
[2004/10/16 22:31:39, 6] lib/util_sock.c:write_socket(449)
  write_socket(5,75)
[2004/10/16 22:31:39, 6] lib/util_sock.c:write_socket(452)
  write_socket(5,75) wrote 75
[2004/10/16 22:31:39, 3] smbd/notify_kernel.c:kernel_remove_notify(144)
  kernel_remove_notify: fd=-1
[2004/10/16 22:31:39, 3] smbd/notify_kernel.c:kernel_check_notify(99)
  kernel_check_notify: kernel change notify on . fd[0]=27 (signals_received=1)
[2004/10/16 22:31:39, 10] smbd/notify.c:process_pending_change_notify_queue(161)
  process_pending_change_notify_queue: dir . changed !
[2004/10/16 22:31:39, 3] smbd/error.c:error_packet(105)
  error string = Interrupted system call
[2004/10/16 22:31:39, 3] smbd/error.c:error_packet(129)
  error packet at smbd/notify.c(55) cmd=160 (SMBnttrans) NT code 0x0000010c
[2004/10/16 22:31:39, 6] lib/util_sock.c:write_socket(449)
  write_socket(5,75)
[2004/10/16 22:31:39, 6] lib/util_sock.c:write_socket(452)
  write_socket(5,75) wrote 75
[2004/10/16 22:31:39, 3] smbd/notify_kernel.c:kernel_remove_notify(144)
  kernel_remove_notify: fd=-1


Thanks in advance for any help!  
Jason Bird