From: Eric Dumazet <eric.duma...@gmail.com> Date: Sat, 11 Nov 2017 15:54:12 -0800
> From: Eric Dumazet <eduma...@google.com> > > I had many reports that TSQ logic breaks wifi aggregation. > > Current logic is to allow up to 1 ms of bytes to be queued into qdisc > and drivers queues. > > But Wifi aggregation needs a bigger budget to allow bigger rates to > be discovered by various TCP Congestion Controls algorithms. > > This patch adds an extra socket field, allowing wifi drivers to select > another log scale to derive TCP Small Queue credit from current pacing > rate. > > Initial value is 10, meaning that this patch does not change current > behavior. > > We expect wifi drivers to set this field to smaller values (tests have > been done with values from 6 to 9) > > They would have to use following template : > > if (skb->sk && skb->sk->sk_pacing_shift != MY_PACING_SHIFT) > skb->sk->sk_pacing_shift = MY_PACING_SHIFT; > > > Ref: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041 > Signed-off-by: Eric Dumazet <eduma...@google.com> > Cc: Johannes Berg <johannes.b...@intel.com> > Cc: Toke Høiland-Jørgensen <t...@toke.dk> > Cc: Kir Kolyshkin <k...@openvz.org> > --- > v2: added kernel-doc comment, based on Johannes feedback. Applied, thanks Eric.
