From: Paolo Abeni <pab...@redhat.com> Date: Thu, 10 Sep 2020 23:33:18 +0200
> flush_all_backlogs() may cause deadlock on systems > running processes with FIFO scheduling policy. > > The above is critical in -RT scenarios, where user-space > specifically ensure no network activity is scheduled on > the CPU running the mentioned FIFO process, but still get > stuck. > > This commit tries to address the problem checking the > backlog status on the remote CPUs before scheduling the > flush operation. If the backlog is empty, we can skip it. > > v1 -> v2: > - explicitly clear flushed cpu mask - Eric > > Signed-off-by: Paolo Abeni <pab...@redhat.com> Applied, thank you.
