From owner-freebsd-stable@FreeBSD.ORG Wed Aug 17 18:37:02 2011 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 71F11106566B; Wed, 17 Aug 2011 18:37:02 +0000 (UTC) (envelope-from asmrookie@gmail.com) Received: from mail-yx0-f182.google.com (mail-yx0-f182.google.com [209.85.213.182]) by mx1.freebsd.org (Postfix) with ESMTP id 0C67F8FC18; Wed, 17 Aug 2011 18:37:01 +0000 (UTC) Received: by yxn22 with SMTP id 22so46128yxn.13 for ; Wed, 17 Aug 2011 11:37:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=trAAOYcmYpZlnYgok46AMUtjvZHFC2k++U47mGVVj2U=; b=sqUGJAaE4KDjM/3jS82nUBzMIjgmSNj8I0ZNcNjFyakDCmUxDTnN3Kf5tjoJuOYfoE 7ZWafvuExXnIBNA+PqhF8NQg5qyTSTF+/ta2Bg0nLy37QYvJswGp7npoS+BAJgNE2+O9 dLCECfFvvihEYnE93cW0AuajGmL6EESACfJU8= MIME-Version: 1.0 Received: by 10.236.75.228 with SMTP id z64mr4420989yhd.68.1313606221377; Wed, 17 Aug 2011 11:37:01 -0700 (PDT) Sender: asmrookie@gmail.com Received: by 10.236.108.33 with HTTP; Wed, 17 Aug 2011 11:37:01 -0700 (PDT) In-Reply-To: <20110818.023832.373949045518579359.hrs@allbsd.org> References: <20110707082027.GX48734@deviant.kiev.zoral.com.ua> <4E159959.2070401@sentex.net> <4E15A08C.6090407@sentex.net> <20110818.023832.373949045518579359.hrs@allbsd.org> Date: Wed, 17 Aug 2011 20:37:01 +0200 X-Google-Sender-Auth: teH8Tr77CO5VlnvGwZYAJJyguaI Message-ID: From: Attilio Rao To: Hiroki Sato Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: kostikbel@gmail.com, freebsd-stable@freebsd.org, avg@freebsd.org Subject: Re: panic: spin lock held too long (RELENG_8 from today) 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: Wed, 17 Aug 2011 18:37:02 -0000 2011/8/17 Hiroki Sato : > Hi, > > Mike Tancsa wrote > =C2=A0in <4E15A08C.6090407@sentex.net>: > > mi> On 7/7/2011 7:32 AM, Mike Tancsa wrote: > mi> > On 7/7/2011 4:20 AM, Kostik Belousov wrote: > mi> >> > mi> >> BTW, we had a similar panic, "spinlock held too long", the spinloc= k > mi> >> is the sched lock N, on busy 8-core box recently upgraded to the > mi> >> stable/8. Unfortunately, machine hung dumping core, so the stack t= race > mi> >> for the owner thread was not available. > mi> >> > mi> >> I was unable to make any conclusion from the data that was present= . > mi> >> If the situation is reproducable, you coulld try to revert r221937= . This > mi> >> is pure speculation, though. > mi> > > mi> > Another crash just now after 5hrs uptime. I will try and revert r22= 1937 > mi> > unless there is any extra debugging you want me to add to the kerne= l > mi> > instead =C2=A0? > > =C2=A0I am also suffering from a reproducible panic on an 8-STABLE box, a= n > =C2=A0NFS server with heavy I/O load. =C2=A0I could not get a kernel dump > =C2=A0because this panic locked up the machine just after it occurred, bu= t > =C2=A0according to the stack trace it was the same as posted one. > =C2=A0Switching to an 8.2R kernel can prevent this panic. > > =C2=A0Any progress on the investigation? Hiroki, how easilly can you reproduce it? It would be important to have a DDB textdump with these informations: - bt - ps - show allpcpu - alltrace Alternatively, a coredump which has the stop cpu patch which Andryi can pro= vide. Thanks, Attilio --=20 Peace can only be achieved by understanding - A. Einstein