[openib-general] Re: [PATCH] change Mellanox SDP workaround to a moduleparameter

[Hal Rosenstock]

On Wed, 2006-02-15 at 16:24, Michael S. Tsirkin wrote:
> Quoting r. Ralph Campbell <ralphc at pathscale.com>:
> > Subject: [PATCH] change Mellanox SDP workaround to a moduleparameter
> > 
> > This patch changes the hardwired MTU limit of 1024 in SDP
> > into a module parameter so it can be disabled for HCAs
> > without the RC performance problem.
> > 
> > Signed-off-by: Ralph Campbell <ralphc at pathscale.com>
> 
> I thought about it some more: what happens if nodes with different
> max MTU values try to connect?
> 
> My understanding of the spec:
> 
> - passive side should send REJ indicating error 

Invalid Path MTU (error 26)

> and passing the maximum MTU it supports

in the ARI

> - active side should retry the connection with a lower MTU

This part is optional.

> Right?
> By the way, this handling seems to be missing in CMA.