IPoIB/cm: Use common CQ for CM send completions

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Use the same CQ for CM send completions as for all other IPoIB
completions.  This means all completions are processed via the same
NAPI polling routine.  This should help reduce the number of
interrupts for bi-directional traffic (such as TCP) and fixes "driver
is hogging interrupts" errors reported for IPoIB send side, e.g.
<https://bugs.openfabrics.org/show_bug.cgi?id=508>

To do this, keep a per-interface counter of outstanding send WRs, and
stop the interface when this counter reaches the send queue size to
avoid CQ overruns.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

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This commit is contained in:

Michael S. Tsirkin 2007-08-16 15:36:16 +03:00 • committed by Roland Dreier

parent cbfb50e6e2

commit 1b524963fd

4 changed files with 82 additions and 95 deletions

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15

drivers/infiniband/ulp/ipoib/ipoib.h

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118

drivers/infiniband/ulp/ipoib/ipoib_cm.c

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46

drivers/infiniband/ulp/ipoib/ipoib_ib.c

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4

drivers/infiniband/ulp/ipoib/ipoib_main.c

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