From owner-freebsd-alpha Thu Mar 15 1:51: 6 2001 Delivered-To: freebsd-alpha@freebsd.org Received: from anchor-post-34.mail.demon.net (anchor-post-34.mail.demon.net [194.217.242.92]) by hub.freebsd.org (Postfix) with ESMTP id 21B0037B718; Thu, 15 Mar 2001 01:51:04 -0800 (PST) (envelope-from dfr@nlsystems.com) Received: from [62.49.251.130] (helo=herring.nlsystems.com) by anchor-post-34.mail.demon.net with esmtp (Exim 2.12 #1) id 14dUPO-00073l-0Y; Thu, 15 Mar 2001 09:51:02 +0000 Received: from salmon.nlsystems.com (salmon [10.0.0.3]) by herring.nlsystems.com (8.11.2/8.11.2) with ESMTP id f2F9nk469928; Thu, 15 Mar 2001 09:49:46 GMT (envelope-from dfr@nlsystems.com) Date: Thu, 15 Mar 2001 09:49:46 +0000 (GMT) From: Doug Rabson To: Tony Griffiths Cc: John Baldwin , Andrew Gallatin , Subject: Re: Deadlocks, whee! In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Thu, 15 Mar 2001, Tony Griffiths wrote: > 1) Logging of request/release calls > 2) Lock hierarchy (ie. take-out ordering) > 3) Spin-lock timeout (ie. panic() after 5000000 failed attempts to gain lock) > 4) something else that I can't remember 'cause it was too long ago!!! We have most of this in the KTR and WITNESS code but for performance reasons they are not always enabled. -- Doug Rabson Mail: dfr@nlsystems.com Phone: +44 20 8348 6160 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message