Hello Marta, Sagi and Leon,
How about changing nvme_rdma_init_sig_count() such that it always returns
a power of two? The "+ 1" in the code below makes sure that the argument of
ilog2() is larger than zero even if queue_size == 1. I'm not sure whether
the time needed to compute ilog2() would make it necessary to cache the
nvme_rdma_init_sig_count() return value.
ilog2 is pretty fast.
static inline int nvme_rdma_init_sig_count(int queue_size)
{
/* Return the largest power of two that is not above half of (queue size + 1) */
return 1 << ilog2((queue_size + 1) / 2);
}
That'd work too I think...
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