From owner-freebsd-current@FreeBSD.ORG Tue Nov 3 08:08:16 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 938E71065670 for ; Tue, 3 Nov 2009 08:08:16 +0000 (UTC) (envelope-from rwatson@FreeBSD.org) Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42]) by mx1.freebsd.org (Postfix) with ESMTP id 701F48FC1E for ; Tue, 3 Nov 2009 08:08:16 +0000 (UTC) Received: from fledge.watson.org (fledge.watson.org [65.122.17.41]) by cyrus.watson.org (Postfix) with ESMTPS id BF51C46B09; Tue, 3 Nov 2009 03:08:15 -0500 (EST) Date: Tue, 3 Nov 2009 08:08:15 +0000 (GMT) From: Robert Watson X-X-Sender: robert@fledge.watson.org To: Ian Freislich In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (BSF 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: FreeBSD-Current Subject: Re: Believed fixed (was: Re: Another panic (during netisr?)) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 Nov 2009 08:08:16 -0000 On Tue, 3 Nov 2009, Ian Freislich wrote: > Robert Watson wrote: >> Since debugging this went offline, the quick summary for the list is: it >> looks like a race condition in the read-write locking for tcbinfo in >> 8.x/9.x was responsible, and I've now committed a fix to head and merged to >> stable/8 this morning. If this recurs with the fix, please let me know, >> because that would mean we fixed the wrong bug. :-) > > Since this I've not had a panic on our routers in the last 25 days. Before, > it would panic about every 5 days with a corrupted stack. Sounds good, thanks! Robert N M Watson Computer Laboratory University of Cambridge