linux-kernel - Re: [regression] NFS readdir change break fully cached nfs root

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Message-ID: <20101102211558.GE2167@basil.fritz.box>
Date:	Tue, 2 Nov 2010 22:15:58 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Trond Myklebust <Trond.Myklebust@...app.com>
Cc:	Andi Kleen <andi@...stfloor.org>, bjschuma@...app.com,
	torvalds@...ux-foundation.org, linux-nfs@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [regression] NFS readdir change break fully cached nfs root

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
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