(forw) Re: Process stuck in STOP state

[Alfred Perlstein]

Can someone look at this?  This is pretty weird, it seems
that somehow there's some deadlock with vnode locks, but it
doesn't appear to be due a leaked vnode lock as "show lockednods"
doesn't show any vnodes locks.

The trace should be somewhat easy to figure out but I'm kinda
of stuck..

Any ideas how this could happen?

-Alfred

----- Forwarded message from Lin Jui-Nan Eric <ericlin at tamama.org> -----

From: "Lin Jui-Nan Eric" <ericlin at tamama.org>
To: "Alfred Perlstein" <alfred at freebsd.org>
Cc: stable at freebsd.org
Subject: Re: Process stuck in STOP state
Date: Fri, 26 Dec 2008 12:41:12 +0800
Message-ID: <47713ee10812252041p3b4ba9e8sa92772264bd2ac3b at mail.gmail.com>

Hi,

Full back-trace is located here:
http://aqua.pixnet.tw/~jnlin/textdump/event3/1226/

On Fri, Dec 26, 2008 at 11:34 AM, Lin Jui-Nan Eric <ericlin at tamama.org> wrote:
> Hi,
>
> No, NFS is not working (df hangs, and cd /nfs/vol hangs, too). we have
> run fstat and see some NFS file is opened.
> I will do a full back-trace while this happened again. (It happens
> very frequently....about 10 times/day now)
>
> On Fri, Dec 26, 2008 at 11:26 AM, Alfred Perlstein <alfred at freebsd.org> wrote:
>> * Lin Jui-Nan Eric <ericlin at tamama.org> [081225 02:44] wrote:
>>> Hi,
>>>
>>> We have done a textdump, located here: http://aqua.pixnet.tw/~jnlin/textdump/
>>> Thank you!
>>
>> Is NFS working when this happens?
>>
>> Can you run lsof too?
>>
>> It would be really good to get a backtrace from all processes, there's
>>  a ddb command to do this.
>>
>> -Alfred
>>
>>>
>>> On Wed, Dec 24, 2008 at 11:07 AM, Alfred Perlstein <alfred at freebsd.org> wrote:
>>> > * Lin Jui-Nan Eric <ericlin at tamama.org> [081223 09:17] wrote:
>>> >> > Dear listers,
>>> >> >
>>> >> > Our FreeBSD Server uses NFS to access PHP files on NetApp, then serve
>>> >> > them with apache 2.2 (worker MPM + php fastcgi mode).
>>> >> Sorry. we use -STABLE now.
>>> >>
>>> >> event# uname -a
>>> >> FreeBSD event 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE #1: Thu Dec  4
>>> >> 01:45:42 CST 2008     root at event:/usr/obj/usr/src/sys/KERNEL  amd64
>>> >> _______________________________________________
>>> >> freebsd-stable at freebsd.org mailing list
>>> >> http://lists.freebsd.org/mailman/listinfo/freebsd-stable
>>> >> To unsubscribe, send any mail to "freebsd-stable-unsubscribe at freebsd.org"
>>> >
>>> > It'd be good if you could get to ddb and do a "show all"
>>> > or "threads" and get all threads backtrace to see what's happening.
>>> >
>>> > thank you,
>>> > --
>>> > - Alfred Perlstein
>>> >
>>> _______________________________________________
>>> freebsd-stable at freebsd.org mailing list
>>> http://lists.freebsd.org/mailman/listinfo/freebsd-stable
>>> To unsubscribe, send any mail to "freebsd-stable-unsubscribe at freebsd.org"
>>
>> --
>> - Alfred Perlstein
>>
>

----- End forwarded message -----

-- 
- Alfred Perlstein