IB/hfi1: Use aborts to trigger RC throttling

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SDMA and pio flushes will cause a lot of packets to be transmitted
after a link has gone down, using a lot of CPU to retransmit
packets.

Fix for RC QPs by recognizing the flush status and:
- Forcing a timer start
- Putting the QP into a "send one" mode

Fixes: 7724105686 ("IB/hfi1: add driver files")
Reviewed-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

...

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Mike Marciniszyn 2019-06-14 12:32:44 -04:00 • committed by Doug Ledford

parent 9755f72496

commit 4bb02e9572

3 changed files with 37 additions and 4 deletions

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30

drivers/infiniband/hw/hfi1/rc.c

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10

drivers/infiniband/hw/hfi1/verbs.c

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1

drivers/infiniband/hw/hfi1/verbs.h

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