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Re: problem on shut-down

From: Justus Winter
Subject: Re: problem on shut-down
Date: Fri, 04 Apr 2014 16:35:07 +0200
User-agent: alot/0.3.4

Quoting Riccardo Mottola (2014-04-04 15:29:06)
> >> >"sendisgs stop"
> > sendsigs uses killall5 which has been proven to be problematic.  In
> > short it does something like 'pkill -SIGSTOP . ; pkill -SIGXXX .'.
> > This is problematic for a multiserver OS like Hurd, because stopping
> > vital system servers will most likely also prevent killall5 from
> > completing its job (e.g. killall5 used to stop procfs and then it
> > tried to iterate over /proc, resulting in a deadlock).
> Do we have a precedence problem here?

What do you mean by this?

> >> >I shut down from console and had a remote connection open. At this point
> >> >even issuing a "sync" will hang and I need to cut the machine's power
> > Please be more specific when reporting this, as ideally I should be
> > able to reproduce your problem.
> >
> > I*guess*  that you meant to say: If you do not log in using telnet,
> > your system shuts down fine, but if you do and then shut your system
> > down, it hangs.  Is that correct?
> Actully, I wasn't implying that the hang is dependent on the open telnet 
> connection. I just said I launched shutdown and watched the progress on 
> the open telnet connection because it is easier and I can check it, 
> copy&paste stuff, etc.
> With a single console (I don't get multiple consoles) it is a bit awkward.

Ok, thanks for clarifying this.

> I don't know yet a minimum set of action that reproduces the hang.
> I know that if I power on, login, shut down all on the local console, 
> the cycle ends with success.
> If on the other and I run apt-get, do some compiling and use the box, it 
> hangs on shutdown. It hangs even if there is no open telnet connection!
> Sometimes bugs can't be easily reproduced, sadly. One needs to gather 
> information in the best possible way then...

Yes, thanks for reporting.  Keep at it, we'll get it eventually :)


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