listener: use EPOLLEXCLUSIVE for listen sockets

Since our listen sockets are non-blocking and we may run
multiple httpd|nntpd processes; we need a way to avoid
thundering herds when there are multiple httpd|nntpd worker
processes.

EPOLLEXCLUSIVE was added just for that in Linux 4.5

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/PublicInbox/Listener.pm b/lib/PublicInbox/Listener.pm
index d1f0d2e9..a75a6fd9 100644
--- a/lib/PublicInbox/Listener.pm
+++ b/lib/PublicInbox/Listener.pm
@@ -17,7 +17,7 @@ sub new ($$$) {
         listen($s, 1024);
         IO::Handle::blocking($s, 0);
         my $self = fields::new($class);
-        $self->SUPER::new($s); # calls epoll_create for the first socket
+        $self->SUPER::new($s, 1); # calls epoll_create for the first socket
         $self->watch_read(1);
         $self->{post_accept} = $cb;
         $self