[Samba] CIFS slow on gigabit, doesn't support sockopt=TCP_NODELAY ?

[Timothy Normand Miller]

Hi, everyone.  I originally sent this to the cifs-vfs mailing list,
but upon reading the descriptions of the lists, I think that might
have been the wrong place to ask.  My apologies for the repeat.  I
hope I got the right place this time.  :)

I've noticed that the cifs client for Linux is slow over gigabit
ethernet.  It seems to max out at about 10 megs/sec, while the drives
can go a lot faster.  Also, if I mount the same network share from a
Mac, it's a lot faster.  When _sharing_ via samba, one can set the
TCP_NODELAY option (among others), which fixes the problem.  But with
the cifs client, I find that there appears to be no way to set the
option.  When mounting manually, you can use "-o sockopt=TCP_NODELAY",
and you can also put that into /etc/fstab.  Either way, the option
appears to be ignored.

I filed this bug with Gentoo:  http://bugs.gentoo.org/265183

Am I doing this wrong?  Is there a work-around?  Or plans to fix it?


Thanks!

-- 
Timothy Normand Miller
http://www.cse.ohio-state.edu/~millerti
Open Graphics Project