[PATCH 1/5] kqnotify: drop EV_CLEAR (edge triggering)

[Eric Wong <e@80x24.org>]

I'm not entirely certain how it works with the way we use
kevent.  I do know IO::KQueue has hard-coded kevent retrievals
to 1000 events so it's conceivable we'd end up missing wakeups
as we don't loop or requeue in callers.  So just rely on the
*BSD kernel to provided requeue behavior for us by using
level-triggering.

In any case, this seems to workaround t/dir_idle.t failures
on Dragonfly due to a tmpfs bug in all versions up to v6.4.
---
 lib/PublicInbox/KQNotify.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/PublicInbox/KQNotify.pm b/lib/PublicInbox/KQNotify.pm
index 2efa887d..1689f4cc 100644
--- a/lib/PublicInbox/KQNotify.pm
+++ b/lib/PublicInbox/KQNotify.pm
@@ -26,7 +26,7 @@ sub watch {
 	my $ident = fileno($w->[2]) // die "BUG: bad fileno $w->[2]: $!";
 	$self->{dskq}->{kq}->EV_SET($ident, # ident (fd)
 		EVFILT_VNODE, # filter
-		EV_ADD | EV_CLEAR, # flags
+		EV_ADD, # flags
 		$mask, # fflags
 		0, $dir_delete); # data, udata
 	$self->{watch}->{$ident} = $w;