Data corruption when using multiple devices with NVMEoF TCP

[Sagi Grimberg]

> Okay, will do that in a few days. Something else just popped up and I 
> have a limited time window to use some machines.

Understood, I'm still trying to understand what can cause a problem
in a multi-bio merge request, that used to work AFAIR...

> BTW, what is the performance implication of disabling merge? My usage 
> pattern is mostly sequential read and write, and write bandwidth is 
> pretty high.

Well, if your writes are bigger in nature to begin with, there is not
a lot of gain, but if they are than there is a potential gain here.

Some of the log messages could also help understand what is the
I/O pattern.