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Date: Wed, 9 May 2007 15:52:28 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Jeff Garzik <jeff@garzik.org>, Chuck Lever <chuck.lever@oracle.com>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       NeilBrown <neilb@suse.de>, Adrian Bunk <bunk@stusta.de>
Subject: Re: [bisect] NFS regression breaks X
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On Wed, 09 May 2007 18:03:26 -0400
Trond Myklebust <Trond.Myklebust@netapp.com> wrote:

> On Wed, 2007-05-09 at 17:30 -0400, Jeff Garzik wrote:
> > Original bug report, with hardware and software info:
> > http://lkml.org/lkml/2007/5/8/667
> > 
> > I love bisect :)  bisect has identified the following commit as the one 
> > that causes my GNOME login to die, within 10 seconds of logging in:
> > 
> > 	commit 2bea90d43a050bbc4021d44e59beb34f384438db
> > 	Author: Chuck Lever <chuck.lever@oracle.com>
> > 	Date:   Thu Mar 29 16:47:53 2007 -0400
> > 
> > 	SUNRPC: RPC buffer size estimates are too large
> > 
> > 100% reproducible, verified regression.  My home directory is an NFSv4 
> > mount, and the problem appears on my client workstation, so this makes 
> > some sense:
> > > sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
> > > pretzel:/ on /g type nfs4 (rw,noatime,proto=tcp,addr=10.10.10.1)
> 
> Known issue.

It's a bit rough that Jeff spent a large amount of time hunting down an
already-known bug.  That's normally my job :(

This five-week-old diff only ever appeared in 2.6.21-mm1, which was
released four days ago.  It was then whizzed into mainline.  We thus lost
five weeks public testing which would probably have saved Jeff his pain.

What went wrong?