Re: BUG at net/sunrpc/svc_xprt.c:921

[Stanislav Kinsbursky]

16.01.2013 00:56, J. Bruce Fields ÐÐÑÐÑ:
> On Mon, Jan 14, 2013 at 11:16:00PM -0500, Mark Lord wrote:
> > On 13-01-14 03:37 PM, J. Bruce Fields wrote:
> > > Thanks for the report.
> > >
> > > On Mon, Jan 14, 2013 at 11:17:09AM -0500, Mark Lord wrote:
> > > > Since upgrading to 3.7, and now 3.7.2, my AMD-450E based server
> > >
> > > It's acting as an NFS client, right?
> >
> > Client and server, with other Linux boxes all running 3.something kernels.
> >
> > > What did you upgrade from?
> >
> > 3.4.something, I believe.
> >
> > > > is getting these BUG complaints.  The .config file is gzip'd/attached.
> > >
> > > Is this easy to reproduce?
> >
> > So far, it seems to pop up within a day or so of any reboot.
> > I normally only reboot that system for a kernel upgrade,
> > but can do so a bit more often if there's useful info to collect.
>
> So this means svc_delete_xprt was called on an xprt twice.
>
> That could happen if server threads are still running (and calling
> svc_recv) after we start shutting down the server: svc_shutdown_net
> assumes that server threads are already shut down, but that isn't true
> any more after the containerization work.
>
> I thought that would only be a bug for users actually running multiple
> containers, but looking at nfs_callback_down, I don't think that's
> true--it seems to always shut down the thread last.

Thanks, Bruce. It reminds me the patch with additional protection for permanents sockets shutdown I've sent you a couple of mount ago...
Look like I should revisit this patch at least.

Mark, could you provide any call traces?

> --b.


--
Best regards,
Stanislav Kinsbursky
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