From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Hurley Subject: [PATCH 0/5] Fix session leader exit hang Date: Wed, 6 Mar 2013 07:20:52 -0500 Message-ID: <1362572457-29993-1-git-send-email-peter@hurleysoftware.com> Return-path: Received: from mailout01.c08.mtsvc.net ([205.186.168.189]:43043 "EHLO mailout01.c08.mtsvc.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752438Ab3CFMVe (ORCPT ); Wed, 6 Mar 2013 07:21:34 -0500 Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: Greg Kroah-Hartman Cc: Jiri Slaby , linux-kernel@vger.kernel.org, Sasha Levin , linux-serial@vger.kernel.org, Peter Hurley When a session leader exits, it hangs up the controlling tty and then signals the foreground group processes with SIGHUP. This sequence can hang as reported by Sasha Levin, and noted in the changelog of 'tty: Signal SIGHUP before hanging up ldisc'. Peter Hurley (5): tty: Refactor session leader SIGHUP from __tty_hangup() tty: Fix spinlock flavor in non-atomic __tty_hangup() tty: Use spin_lock() inside existing critical region tty: Signal foreground group processes in hangup tty: Signal SIGHUP before hanging up ldisc drivers/tty/tty_io.c | 144 ++++++++++++++++++++++++++++++++++----------------- 1 file changed, 96 insertions(+), 48 deletions(-) -- 1.8.1.2