From owner-freebsd-current@FreeBSD.ORG Wed Jun 19 18:19:32 2013 Return-Path: Delivered-To: current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 887AB6D9; Wed, 19 Jun 2013 18:19:32 +0000 (UTC) (envelope-from ianf@clue.co.za) Received: from zcs04.jnb1.cloudseed.co.za (zcs04.jnb1.cloudseed.co.za [41.154.0.161]) by mx1.freebsd.org (Postfix) with ESMTP id 24F3A16D6; Wed, 19 Jun 2013 18:19:31 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by zcs04.jnb1.cloudseed.co.za (Postfix) with ESMTP id AA3192A83231; Wed, 19 Jun 2013 20:19:29 +0200 (SAST) X-Virus-Scanned: amavisd-new at zcs04.jnb1.cloudseed.co.za Received: from zcs04.jnb1.cloudseed.co.za ([127.0.0.1]) by localhost (zcs04.jnb1.cloudseed.co.za [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id rGpIqmLligJb; Wed, 19 Jun 2013 20:19:29 +0200 (SAST) Received: from clue.co.za (unknown [41.154.88.19]) by zcs04.jnb1.cloudseed.co.za (Postfix) with ESMTPSA id 69A892A8322F; Wed, 19 Jun 2013 20:19:28 +0200 (SAST) Received: from localhost ([127.0.0.1] helo=zen.clue.co.za) by clue.co.za with esmtp (Exim 4.80.1 (FreeBSD)) (envelope-from ) id 1UpMyU-0005fA-5r; Wed, 19 Jun 2013 20:19:18 +0200 To: Gleb Smirnoff From: Ian FREISLICH Subject: Re: Panic in tcp_input In-Reply-To: <20130619123131.GC1214@glebius.int.ru> References: <20130619123131.GC1214@glebius.int.ru> <51C17A3B.2030809@freebsd.org> <51C1A1FE.8040300@freebsd.org> X-Attribution: BOFH Date: Wed, 19 Jun 2013 20:19:16 +0200 Message-Id: Cc: jeffr@FreeBSD.org, Andre Oppermann , current@freebsd.org X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.14 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: Wed, 19 Jun 2013 18:19:32 -0000 Gleb Smirnoff wrote: > A> This seems to be a fallout of the recent UMA changes and its interaction > A> with the per-cpu counter(9) system. > A> > A> Adding in and handing over to Gleb and Jeff as they touched this area last . > > Ian has reported this panic several days before Jeff's changes :( Do you want me to try to find the revision of origin? I have a verified sighting at r251615 and I'm pretty sure I've seen it earlier than that. Subjectively, it seems to have got a lot worse lately. Maybe the "recent UMA changes" have exposed some latent issue? Ian -- Ian Freislich