[PATCH 2/2] listener: maximize listen(2) backlog

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

This helps avoid errors from script/lei dying on ECONNRESET
when a single lei-daemon is serving all tests when run via
"make check-run".

Instead of using some arbitrary limit, use INT_MAX and let
the kernel clamp it (both Linux and FreeBSD do).

There's no need to call listen() in LEI.pm, either, since
Listener->new takes care of it.
---
 lib/PublicInbox/LEI.pm      | 1 -
 lib/PublicInbox/Listener.pm | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/lib/PublicInbox/LEI.pm b/lib/PublicInbox/LEI.pm
index 191a0790..38b268d3 100644
--- a/lib/PublicInbox/LEI.pm
+++ b/lib/PublicInbox/LEI.pm
@@ -1205,7 +1205,6 @@ sub lazy_start {
 	}
 	umask(077) // die("umask(077): $!");
 	bind($listener, $addr) or die "bind($path): $!";
-	listen($listener, 1024) or die "listen: $!";
 	$lk->lock_release;
 	undef $lk;
 	my @st = stat($path) or die "stat($path): $!";
diff --git a/lib/PublicInbox/Listener.pm b/lib/PublicInbox/Listener.pm
index c8315810..64bba5b0 100644
--- a/lib/PublicInbox/Listener.pm
+++ b/lib/PublicInbox/Listener.pm
@@ -20,7 +20,7 @@ sub new ($$$) {
 	my ($class, $s, $cb) = @_;
 	setsockopt($s, SOL_SOCKET, SO_KEEPALIVE, 1);
 	setsockopt($s, IPPROTO_TCP, TCP_NODELAY, 1); # ignore errors on non-TCP
-	listen($s, 1024);
+	listen($s, 2**31 - 1); # kernel will clamp
 	my $self = bless { post_accept => $cb }, $class;
 	$self->SUPER::new($s, EPOLLIN|EPOLLET|EPOLLEXCLUSIVE);
 }