[ofa-general] running ib diagnostics blocks

[Or Gerlitz]

Eli Dorfman wrote:

> What could be the reason that open("/dev/infiniband/umad0",
> O_RDWR|O_NONBLOCK)
> blocks and does not return. I did not find any errors in dmesg.


Eli,

You can examine the kernel stack of all processes, including yours... using
sysrq ($ echo 1 > /proc/sysrq-trigger and then $ echo t >
/proc/sysrq-trigge) and looking in the dmesg. e.g see if some other process
which deals with umad is in the D state...

Or.
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