tail_notify: cleanups and wakeup avoidance

Avoid adding redundant watches at initialization, and avoid
unnecessarily wake ups when no timeout is specified.

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/PublicInbox/TailNotify.pm b/lib/PublicInbox/TailNotify.pm
index a0347aa5..cbbc1041 100644
--- a/lib/PublicInbox/TailNotify.pm
+++ b/lib/PublicInbox/TailNotify.pm
@@ -43,7 +43,6 @@ sub new {
         } else {
                 $self->{inot} = PublicInbox::FakeInotify->new;
         }
-        $self->{inot}->watch($fn, $TAIL_MOD);
         reopen_file($self);
         $self->{inot}->watch($fn, $TAIL_MOD);
         $self;
@@ -64,6 +63,8 @@ again:
                         if (defined $end) {
                                 $wait = $end - now;
                                 $wait = 0 if $wait < 0;
+                        } else {
+                                undef $wait;
                         }
                 }
                 select($rfds, undef, undef, $wait);