From: Paolo Abeni <pab...@redhat.com>
Date: Fri, 2 Dec 2016 17:35:49 +0100
> Before commit 850cbaddb52d ("udp: use it's own memory accounting
> schema"), the udp protocol allowed sk_rmem_alloc to grow beyond
> the rcvbuf by the whole current packet's truesize. After said commit
> we allow sk_rmem_alloc to exceed the rcvbuf only if the receive queue
> is empty. As reported by Jesper this cause a performance regression
> for some (small) values of rcvbuf.
>
> This commit is intended to fix the regression restoring the old
> handling of the rcvbuf limit.
>
> Reported-by: Jesper Dangaard Brouer <bro...@redhat.com>
> Fixes: 850cbaddb52d ("udp: use it's own memory accounting schema")
> Signed-off-by: Paolo Abeni <pab...@redhat.com>
Applied.
