From owner-freebsd-stable@FreeBSD.ORG Mon Jun 29 13:18:05 2009 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 9F2D01065677; Mon, 29 Jun 2009 13:18:05 +0000 (UTC) (envelope-from pluknet@gmail.com) Received: from mail-bw0-f216.google.com (mail-bw0-f216.google.com [209.85.218.216]) by mx1.freebsd.org (Postfix) with ESMTP id E22558FC1E; Mon, 29 Jun 2009 13:18:04 +0000 (UTC) (envelope-from pluknet@gmail.com) Received: by bwz12 with SMTP id 12so326892bwz.43 for ; Mon, 29 Jun 2009 06:18:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=nOlIEJB+xIs6Qtg5IPbTXAjt3jQ10idES/G/BjG54mo=; b=ITsWUloaIvC2zOlSZKCRgf5ZuYlzZ2gjgqvfmN5lhIpa8P/1oVa2+2SbowgTd/npE7 ZXWsnFQu5sd7OnTtppJEppU6XbDQAvJ2AiAb2cgK7c3XuAeRcizgkrJjf75QMw9sNLdW ava+4zBYYIzo0m2DCVM4LpzDVhQFkRb2jyDNA= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=vgzPq4uR9CTFK5pk7xtISOmgrGNzcj2zrx66fI0bfADdM43hx9nmdvpmx7hpdPHDUM ZUycE3zKmUDTBaioH0Pl7VAhuvYATKSuCfG81dHKbLVixCbAOxP9OpQFZOSkEoDKS4PG 5C+jIjgUQ9kDMzsY2DGtdM4L4lqBUBSfbXF+g= MIME-Version: 1.0 Received: by 10.204.61.204 with SMTP id u12mr7112513bkh.149.1246281483673; Mon, 29 Jun 2009 06:18:03 -0700 (PDT) In-Reply-To: <3bbf2fe10906290611j683a0ddawbd524e406e832d54@mail.gmail.com> References: <3bbf2fe10906290458v3d57441ar44c4ed8f36c957f@mail.gmail.com> <3bbf2fe10906290611j683a0ddawbd524e406e832d54@mail.gmail.com> Date: Mon, 29 Jun 2009 17:18:03 +0400 Message-ID: From: pluknet To: Attilio Rao Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: freebsd-stable Subject: Re: [nfs] process locks in "bo_wwait" on 6.4 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: Mon, 29 Jun 2009 13:18:06 -0000 2009/6/29 Attilio Rao : > 2009/6/29 pluknet : >> 2009/6/29 Attilio Rao : >>> 2009/6/29 pluknet : >>>> 2009/6/26 pluknet : >>>>> 2009/6/26 pluknet : >>>>>> Hello. >>>>>> >>>>>> While building a module on nfs mounted /usr/src >>>>>> I got an unkillable process waiting forever in bo_wwait. >>>>> >>>>> Small note: iface on NFS server has mtu changed from 1500 to 1450. >>>>> Can this be a source of the problem? >>>> >>>> This is 100% reproducible. Lock in the same place. Any hints? >>> >>> Can you also show the value of ps? >>> A precise map of what processes are doing would give an help. >>> Also would be useful to printout traces for other threads and not only >>> the stucked one. >>> >> >> >From another run: > > I'm unable to see who would be locking the buffer object in question. > Do you have INVARIANT_SUPPORT/INVARIANTS on? Yes, I do both. > What revision of /usr/src/sys/kern/vfs_bio.c are you running with? > As of 6.4-R: CVS rev 1.491.2.12.4.1 / SVN rev 183531. -- wbr, pluknet