On Thu, 2016-04-14 at 22:56 -0400, David Miller wrote: > From: Paolo Abeni <pab...@redhat.com> > Date: Wed, 13 Apr 2016 10:52:20 +0200 > > > Currently the tun device accounting uses dev->stats without applying any > > kind of protection, regardless that accounting happens in preemptible > > process context. > > This patch move the tun stats to a per cpu data structure, and protect > > the updates with u64_stats_update_begin()/u64_stats_update_end() or > > this_cpu_inc according to the stat type. The per cpu stats are > > aggregated by the newly added ndo_get_stats64 ops. > > > > Signed-off-by: Paolo Abeni <pab...@redhat.com> > > Ok this seems reasonable, applied, thanks. > > I guess most applications use tuntap by having two threads, one > for transmit and one for receive processing?
Probably. I guess that an user space application can leverage multiple transmit threads to improve the throughput. Paolo
