Non-accessible NFS share via SMB and NFS lag

[Garrett Cooper]

Hello,
	I am having an issue with NFS and SMB on two FreeBSD machines.
The particularly strange thing is that this problem didn't occur when I
ran Gentoo Linux on PC_2.

Setup:
1. PC_1 and PC_2 share with each other via NFS.
2. Both PCs run patched versions of FreeBSD 6.1 RELEASE (see below).
3. PC_1 runs samba and shares NFS shared directories from PC_2 to LAN.
4. PC_1 runs a neutered firewall (basically accepting traffic on all
ports, because RPC ports at service start are randomized by rpcbind)
with ipf, and PC_2 doesn't have a firewall configured.

Problems/Condition:
1. NFS works perfectly fine from PC_1 when transferring _to_ PC_2; in
fact it works excellently when transferring files to PC_2.

2. NFS on PC_1 lags under heavy load when transferring large amounts of
data from PC_2 to PC_1, but not with other NFS clients. An OSX machine
that uses NFS to transfer data to PC_1 works really well in fact.

3. When clients attempt to access and cache data from PC_1's
directories, it works near instantaneously. However, when caching data
from PC_2's NFS exported directories, the client locks the file but
times out when caching large amounts of data. Windows loads up
thumbnails, but hangs when opening the file. Machines running smbclient
start caching the file but then fail to load the file. The file remains
locked until smbd is restarted.

TIA!
-Garrett


PC_1's information:
uname:
FreeBSD hoover.localdomain 6.1-RELEASE-p10 FreeBSD 6.1-RELEASE-p10 #17:
Tue Dec 19 23:00:01 PST 2006
gcooper at hoover.localdomain:/usr/obj/usr/src/sys/HOOVER  i386

/etc/rc.conf (snippet):
nfs_client_enable="YES"
nfs_client_flags="-n 4"
nfs_reserved_port_only="NO"
nfs_server_enable="YES"
nfs_server_flags="-u -t -n 4"
rpcbind_enable="YES"

smb.conf:
[global]
   workgroup = WORKGROUP
   encrypt passwords = yes
   log file = /var/log/samba/log.%m
   log level = 6 passdb:3 auth:3
#   log level = 5
   socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
   local master =  yes
   preferred master = yes
   dns proxy = no
   guest ok = no
   change notify timeout = 10

[local]
   path = /store
   writeable = yes
   public = yes
   hosts deny = shiina pinocchio
   create mask = 0770

[remote]
   path = /rmt
   writeable = yes
   public = yes
   hosts allow = sexbox
   hosts deny = shiina pinocchio
   create mask = 0770


PC_2's information:
uname:
FreeBSD hoover.localdomain 6.1-RELEASE-p10 FreeBSD 6.1-RELEASE-p10 #17:
Tue Dec 19 23:00:01 PST 2006
gcooper at hoover.localdomain:/usr/obj/usr/src/sys/HOOVER  i386

/etc/make.conf:
CFLAGS= -O2 -pipe
CXXFLAGS= ${CFLAGS}
COPTFLAGS= ${CFLAGS} -msse -msse2 -mfpmath=sse,387

/etc/rc.conf (snippet):
nfs_client_enable="YES"
nfs_client_flags="-n 4"
nfs_reserved_port_only="NO"
nfs_server_enable="YES"
nfs_server_flags="-u -t -n 4"
rpcbind_enable="YES"