IB/ehca: Allocate event queue size depending on max number of CQs and QPs

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If a lot of QPs fall into Error state at once and the EQ of the
respective HCA is too small, it might overrun, causing the eHCA driver
to stop processing completion events and calling the application's
completion handlers, effectively causing traffic to stop.

Fix this by limiting available QPs and CQs to a customizable max
count, and determining EQ size based on these counts and a worst-case
assumption.

Signed-off-by: Stefan Roscher <stefan.roscher@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

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This commit is contained in:

Stefan Roscher 2008-04-29 13:46:53 -07:00 • committed by Roland Dreier

parent f56bcd8013

commit d227fa7288

4 changed files with 74 additions and 4 deletions

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5

drivers/infiniband/hw/ehca/ehca_classes.h

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11

drivers/infiniband/hw/ehca/ehca_cq.c

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36

drivers/infiniband/hw/ehca/ehca_main.c

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26

drivers/infiniband/hw/ehca/ehca_qp.c

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