From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ross Anderson Subject: Bcache hang Date: Wed, 09 Jan 2013 13:17:39 -0600 Message-ID: <50EDC253.1020609@dsotm.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-bcache-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-bcache@vger.kernel.org Current bcache and bcache-testing cause kernel panic on bcache add. These are on existing devices, Echo 1 to unregistered, remove existing cache device replace with new, make-bcache -C, then echo to register. Register hangs and following kernel output and hang occurs. The following is debug info for the hang http://pastebin.com/87iYygdw