From owner-freebsd-current@FreeBSD.ORG Fri Feb 4 17:23:00 2005 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B15FC16A4CE for ; Fri, 4 Feb 2005 17:23:00 +0000 (GMT) Received: from web80605.mail.yahoo.com (web80605.mail.yahoo.com [66.218.79.94]) by mx1.FreeBSD.org (Postfix) with SMTP id 6EF5643D48 for ; Fri, 4 Feb 2005 17:23:00 +0000 (GMT) (envelope-from mohan_srinivasan@yahoo.com) Message-ID: <20050204172300.66172.qmail@web80605.mail.yahoo.com> Received: from [64.172.45.63] by web80605.mail.yahoo.com via HTTP; Fri, 04 Feb 2005 09:23:00 PST Date: Fri, 4 Feb 2005 09:23:00 -0800 (PST) From: Mohan Srinivasan To: Kris Kennaway In-Reply-To: <20050204071502.GA17866@xor.obsecurity.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii cc: ps@FreeBSD.org cc: current@FreeBSD.org Subject: Re: Processes stuck in nfsreq X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 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: Fri, 04 Feb 2005 17:23:00 -0000 Since we don't have a core, is it possible for me to get access to your kgdb client and the target host ? I was unable to reproduce this on my setup last time I tried (when you reported the issue first). (I've been sick this week, but I can look at this first thing Monday). mohan --- Kris Kennaway wrote: > On Thu, Feb 03, 2005 at 10:29:16AM -0800, Mohan Srinivasan wrote: > > Hi, > > > > In the info you have below, the NFS request was not sent (R_SENT > > is not set). We didn't send out the request because possibly nm_cwnd > > didn't allow us to send the request. If nfs_request() could not send > > the request, then typically, the request would be retransmitted from > > nfs_timer(). > > > > If nm_cwnd is full, then there must be a lot of outstanding requests > > that haven't been replied to yet (on this mount), which is the fundamental > > issue. > > > > Can you force a core dump and send me a pointer to it ? > > > > Also, after you force a core, can you also try a quick workaround - someone > > else also reported NFS client hangs and said that things were fine > > after they set mpsafenet to 0. It would be good to see if there's a > > correlation there. > > FYI, it looks like turning off mpsafenet indeed masks the bug. > > Kris > > ATTACHMENT part 2 application/pgp-signature