I have a small fabric with ConnectX HCAs and I run some tests with 2 Open SMs
that
take over of each other (either by discovering that the MASTER is not
responding or by coming up
with higher priority).
I noticed that in 2.6.28-rc6 I get in IPoIB a LID_CHANGE event (while expecting
CLIENT_REREGISTER) even though
LID was not changed. I looked where the events are generated in
drivers/infiniband/hw/mlx4/mad.c:smp_snoop()
if (pinfo->clientrereg_resv_subnetto & 0x80)
event.event = IB_EVENT_CLIENT_REREGISTER;
else
event.event = IB_EVENT_LID_CHANGE;
and see that clientrereg bit is off.
I checked this simultaneously with a host running kernel 2.6.27 and see that
the bit is on and
CLIENT_REREGISTER is generated.
Things get worse of this patch
(http://lists.openfabrics.org/pipermail/general/2008-November/055680.html)
is applied since no event would be dispatched at all (BTW Jack, I think you
forgot to send the second half for mthca)
I'll appreciate a clue where does the reregister bit turned off.
thanks
MoniS
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