[openib-general] [PATCH] IB/SRP: Enable multichannel

[Vu Pham]

Michael S. Tsirkin wrote:
> Quoting r. Vu Pham <vuhuong at mellanox.com>:
> 
>>Either you can use multiple channels or derive different 
>>initiator_port_ID in the login req to have multiple paths on 
>>the same physical port
> 
> 
> So how about we just stick a pointer inside the indentifier extension
> instead of enabling multichannel?
> 

That's the simple change. Beside that you have to maintain a 
list of connections/channels connected to the same target, 
to manage/clean-up resource associated with these 
connections, how to handle error recovery especially target 
reset and host reset...

What is the advantage to have multiple connections/qps on 
the same physical port to the same target? The disavantages 
are wasting resources, instability, no fail-over on physical 
port error...