[Samba] strange behavior with windows client

[v study]

Hello:

Tracing thru an issue with poor performance with windows client, I came
across some pieces of code inside samba that have special conditions for
handling windows clients, like, smb_roundup() inside trans2.c file etc, etc
(in samba 3.2.x)

Can someone please help me understand or point me to some earlier
discussions on what this is purpose of this special behavior...if I just
return from this roundup fn, linux client gets impacted...

The following thread has some discussion but if someone can provide more
info, I would really appreciate it:
http://www.mail-archive.com/samba-technical@lists.samba.org/msg00058.html

Thanks for your help!