From owner-freebsd-stable@FreeBSD.ORG Sat Jul 10 17:09:14 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D063C106566C; Sat, 10 Jul 2010 17:09:14 +0000 (UTC) (envelope-from dudu@dudu.ro) Received: from mail-wy0-f182.google.com (mail-wy0-f182.google.com [74.125.82.182]) by mx1.freebsd.org (Postfix) with ESMTP id 4D60D8FC14; Sat, 10 Jul 2010 17:09:13 +0000 (UTC) Received: by wyb34 with SMTP id 34so2902534wyb.13 for ; Sat, 10 Jul 2010 10:09:05 -0700 (PDT) Received: by 10.216.132.86 with SMTP id n64mr1312925wei.11.1278781745233; Sat, 10 Jul 2010 10:09:05 -0700 (PDT) MIME-Version: 1.0 Received: by 10.216.80.147 with HTTP; Sat, 10 Jul 2010 10:08:45 -0700 (PDT) In-Reply-To: <4B7AD495.30900@FreeBSD.org> References: <4B79297D.9080403@FreeBSD.org> <4B79205B.619A0A1A@verizon.net> <4B7A38F5.3090404@FreeBSD.org> <4B7A7D2C.9040200@quip.cz> <4B7AD495.30900@FreeBSD.org> From: Vlad Galu Date: Sat, 10 Jul 2010 19:08:45 +0200 Message-ID: To: freebsd-net@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 Cc: freebsd-stable@freebsd.org Subject: Re: Sudden mbuf demand increase and shortage under the load X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 10 Jul 2010 17:09:14 -0000 On Tue, Feb 16, 2010 at 7:23 PM, Maxim Sobolev wrote: > Miroslav Lachman wrote: >> >> Can it be related to this issue somehow? >> >> http://lists.freebsd.org/pipermail/freebsd-current/2009-August/011013.html >> http://lists.freebsd.org/pipermail/freebsd-current/2009-August/010740.html >> >> It was tested on FreeBSD 8 and high UDP traffic on igb interfaces emits >> messages "GET BUF: dmamap load failure - 12" and later results in kernel >> panic. >> We have not received any response to this report. > > Could be the issue, however in our case there is no panic, just that all > userland activity in the system ceases for 2 minutes after it reaches > certain network load level. Sorry for digging into this old thread, but I'm seeing similar symptoms with today's RELENG_8 and bge(4) attached to BCM5721, on an UP system. kern.ipc.nmbclusters is 65536, but what strikes me odd is this: 0/115446003/57722999 requests for mbufs denied (mbufs/clusters/mbuf+clusters) vmstat -i shows a rate of 1100 for the adapter. The machine runs a fairly small PF configuration, but I've already ruled it out, the symptoms appear when PF is disabled as well. I'll happily provide more info. Regards, Vlad -- Good, fast & cheap. Pick any two.