> wc->queue[head].port_num = entry->port_num;
> + wmb();
> wc->head = next;
Please add comments explaining these barriers... maybe something like
/* Make sure queue entry contents are visible before head index update */
also I notice that the latest libibipathverbs git tree (which hasn't
been touched for 3 months) does not seem to have the analogous read
memory barrier when polling CQ contents.
- R.
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