[ofa-general] Re: performance drop for datagram mode with the new connectx FW

[Eli Cohen]

On Tue, Jul 01, 2008 at 10:19:34AM +0300, Eli Cohen wrote:
> On Tue, Jul 01, 2008 at 09:41:30AM +0300, Or Gerlitz wrote:
> > notes:
> > 
> > - in all cases, I have set the mtu manually
> 
> Or, just to be sure the kernel does not filter out MTU changes that
> have the same value, you can either apply the patches or make sure
> that when you change the value, you go through another value. For
> example:
> 
> ifconfig ib0 mtu 2000
> ifconfig ib0 mtu 2044
> 

I was just able to verify that the above suggestion is required, at
least on my systems (SLES 10). This is of course valid for changing to
CM mode too.