On Fri, 11 Apr 2025 14:54:50 +1000
David Gibson <david(a)gibson.dropbear.id.au> wrote:
Hi Stefano,
When debugging the splice EINTR bug I fixed the other day, I found the
whole tcp_splice_sock_handler() pretty confusing to follow. So, I was
working on some cleanups. But then I noticed something more
specifically odd here.
We've discussed the use of SO_RCVLOWAT previously. AIUI, you found it
essential to achieve reasonable throughput and load for spliced
connections.
From my tests back then (never on what I ended up committing, it seems)
it wasn't needed in general, it helped only with bulk transfers that
never feel the pipe for some reason. With iperf3, I needed to play with