On Wed, 2017-05-03 at 09:53 -0600, Jason Gunthorpe wrote: > On Wed, May 03, 2017 at 05:19:27PM +0200, Marta Rybczynska wrote: > > > > where > > > queue->sig_limit = max(queue->queue_size / 2, 1); > > > > I tried to avoid that because this adds a division in the fast path Bart > > was unhappy about in v2. > > The compiler switches divide/multiply by powers of two into fast bit shifts. Hello Jason, As far as I know the compiler only does that for compile-time constants. In this case the divisor (max(queue_size / 2, 1)) is not a compile-time constant. Bart.-- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
