I installed the cifs.ko kernel module on my whitelight. Now I'm able to mount remote volumes on my nas and configuring Twonky to index the mount points I can access to media content that is not located on my private network using my smart tv. :)
I noticed a problem: SD content always play smooth but HD content causes intermittent buffering pauses.
I increased rsize that defaults to max 16K to new value of 130048 loading kernel module with parameter CIFSMaxBufSize=130048.
Now 720p play always smooth and almost all the 1080p content too. But content with very high bitrates still buffers.
For this reason, I'm asking to module maintainer if it could be possible to enable direcio option on module to try further speed optimizationor do better things with his help.