Re: [NFS] Server-side locking issue

[Christian Robottom Reis <kiko@canonical.com>]

On Fri, May 09, 2008 at 11:43:05AM -0400, J. Bruce Fields wrote:
> I don't think the server stopped responding to clients in the case
> Miklos described.

Okay. Well, one month later, it happened again to me.

> Perhaps a sysrq-T dump of lockd would show where (and whether) it's
> blocked?  (So once lockd stops responding, log into the server, run
> "echo t >/proc/sysrq-trigger", and collect the output from the logs,
> especially the stacktrace for the lockd process).

This time I did a ps auxww locking for the lockd process. And guess
what?

root      6323  0.0  0.0      0     0 ?        D    Jun01   0:50 [lockd]

I wonder why it's in the D state. I also wonder if there's a way to get
it back once it's in this state -- without reloading the kernel module
or rebooting, I guess.

I've collected a trace, at any rate, but lockd isn't even listed in it --
I can send it in if it makes sense.

What sort of debugging can I do to figure out what's wrong here?

(This is a dual-Xeon running:

    Linux anthem 2.6.22-14-generic #1 SMP Tue Feb 12 07:42:25 UTC 2008 i686 GNU/Linux)
-- 
Christian Robottom Reis | http://async.com.br/~kiko/ | [+55 16] 3376 0125

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