From: Andi Kleen Subject: Re: [regression] NFS readdir change break fully cached nfs root Date: Tue, 2 Nov 2010 22:15:58 +0100 Message-ID: <20101102211558.GE2167@basil.fritz.box> References: <20101102180051.GA26089@basil.fritz.box> <1288731930.534.1.camel@heimdal.trondhjem.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Andi Kleen , bjschuma@netapp.com, torvalds@linux-foundation.org, linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org To: Trond Myklebust Return-path: Received: from one.firstfloor.org ([213.235.205.2]:55863 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753038Ab0KBVQD (ORCPT ); Tue, 2 Nov 2010 17:16:03 -0400 In-Reply-To: <1288731930.534.1.camel-rJ7iovZKK19ZJLDQqaL3InhyD016LWXt@public.gmane.org> Sender: linux-nfs-owner@vger.kernel.org List-ID: On Tue, Nov 02, 2010 at 05:05:30PM -0400, Trond Myklebust wrote: > On Tue, 2010-11-02 at 19:00 +0100, Andi Kleen wrote: > > My NFS root test systems stopped booting with 2.6.37-rc1. It just > > hangs after entering user space. > > > > The NFS root setup uses a slightly fancy parameter setup to minimize > > network traffic: > > > > nfsroot=10.23.204.1:/home/nfsroot/edwin,nocto,acregmin=86400,acregmax=86400,acdirmin=86400,acdirmax=86400 root=/dev/nfs > > > > I bisected it down to this commit from Bryan. > > > > Unfortunately it's not trivially revertable because that conflicts > > with later patches. > > Does the following patch help? Yes that fixes it. Thanks. Test system boots again. -Andi