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Message-ID: <48BAF643.4070808@opengridcomputing.com>
Date: Sun, 31 Aug 2008 14:51:31 -0500
From: Tom Tucker <tom@...ngridcomputing.com>
To: Ian Campbell <ijc@...lion.org.uk>
CC: "J. Bruce Fields" <bfields@...ldses.org>,
Trond Myklebust <trond.myklebust@....uio.no>,
John Ronciak <john.ronciak@...il.com>,
Grant Coady <gcoady.lk@...il.com>,
linux-kernel@...r.kernel.org, neilb@...e.de,
linux-nfs@...r.kernel.org,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
Jesse Brandeburg <jesse.brandeburg@...el.com>,
Bruce Allan <bruce.w.allan@...el.com>,
PJ Waskiewicz <peter.p.waskiewicz.jr@...el.com>,
John Ronciak <john.ronciak@...el.com>,
e1000-devel@...ts.sourceforge.net
Subject: Re: NFS regression? Odd delays and lockups accessing an NFS export.
Ian Campbell wrote:
> On Sun, 2008-08-31 at 15:30 -0400, J. Bruce Fields wrote:
>> On Sat, Aug 30, 2008 at 04:47:41PM +0100, Ian Campbell wrote:
>>> On Wed, 2008-08-27 at 09:43 -0500, Tom Tucker wrote:
>>>> Sure. I've actually tried to reproduce it here unsuccessfully.
>>>>
>>>> As a starter, I would suggest turning on transport debugging:
>>>>
>>>> # echo 256 > /proc/sys/sunrpc/rpc_debug
>>>> [...]
>>>> If Ian is willing to create the log (or already has one), I'm
>>>> certainly willing to look at it.
>>> It produced only the following (is that what was expected?):
>>>
>>> [146866.448112] -pid- proc flgs status -client- -prog- --rqstp- -timeout -rpcwait -action- ---ops--
>>> [146866.448112] 30576 0001 00a0 0 f77a1600 100003 f7903340 15000 xprt_pending fa0ba88e fa0c9df4
>>> [146866.448112] 30577 0004 0080 -11 f77a1600 100003 f7903000 0 xprt_sending fa0ba88e fa0c9df4
>> It's normal to get something like that when you turn it on, yes (unless
>> someone else spots anything odd about that...) but what's really needed
>> is to turn this on and then reproduce the problem--it's the debugging
>> output that goes to the logs during the problem that'll be interesting.
>
> That's what I did. The first time I did the echo I just got the header
> line, then I waited for the repro and since there had been no further
> logging I ran the echo again and got the three lines above.
>
> Sounds like you expected there to be more and ongoing logging?
>
> Ian.
>
Looks like you ran this on the client. Sorry, Ian, I should have been more
specific. You need to modify the rpc_debug file on the server.
Tom
>> --b.
>>
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