From: Eric Dumazet <eric.duma...@gmail.com> Date: Thu, 02 Feb 2017 20:40:08 -0800
> From: Eric Dumazet <eduma...@google.com> > > Josef Bacik diagnosed following problem : > > I was seeing random disconnects while testing NBD over loopback. > This turned out to be because NBD sets pfmemalloc on it's socket, > however the receiving side is a user space application so does not > have pfmemalloc set on its socket. This means that > sk_filter_trim_cap will simply drop this packet, under the > assumption that the other side will simply retransmit. Well we do > retransmit, and then the packet is just dropped again for the same > reason. > > It seems the better way to address this problem is to clear pfmemalloc > in the TCP transmit path. pfmemalloc strict control really makes sense > on the receive path. > > Signed-off-by: Eric Dumazet <eduma...@google.com> > Acked-by: Josef Bacik <jba...@fb.com> Applied.
