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IB/mlx5: Fire the CQ completion handler from tasklet 

Previously, mlx5_ib_cq_comp was executed from interrupt context.
Under heavy load, this could cause the CPU core to be in an interrupt
context too long.
Instead of executing the handler from the interrupt context we
execute it from a much friendly tasklet context.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Matan Barak 2016-04-17 17:08:41 +03:00 committed by Doug Ledford
parent 94c6825e0f
commit c16d2750a0
1 changed files with 4 additions and 1 deletions
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5
drivers/infiniband/hw/mlx5/cq.c
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@ -879,7 +879,10 @@ struct ib_cq *mlx5_ib_create_cq(struct ib_device *ibdev,
mlx5_ib_dbg(dev, "cqn 0x%x\n", cq->mcq.cqn); mlx5_ib_dbg(dev, "cqn 0x%x\n", cq->mcq.cqn);
cq->mcq.irqn = irqn; cq->mcq.irqn = irqn;
cq->mcq.comp = mlx5_ib_cq_comp; if (context)
cq->mcq.tasklet_ctx.comp = mlx5_ib_cq_comp;
else
cq->mcq.comp = mlx5_ib_cq_comp;
cq->mcq.event = mlx5_ib_cq_event; cq->mcq.event = mlx5_ib_cq_event;
INIT_LIST_HEAD(&cq->wc_list); INIT_LIST_HEAD(&cq->wc_list);