date:20120123

Re: System hangs due to NFS share

2012-01-23 Thread Sylvain

2012/1/23 Frank :
> On Mon, 2012-01-23 at 11:47 +0100, Sylvain wrote:
>
>> I already tried this option too, but it didn't help. Also according to
>> the manpage:
>>
>> > The intr / nointr mount option is deprecated after kernel 2.6.25.  Only 
>> > SIGKILL can interrupt a pending NFS operation on these kernels, and  if  
>> > specified, this mount option is ignored to provide backwards compatibility 
>> > with older kernels.
>
> OK, the man page is not yet available on lenny.
>
> Have you tried to kill the process using SIGKILL? What happens if you
> do? I assume this behaviour is related to the state TASK_KILLABLE which
> was introduced in kernel 2.6.25. In previous kernels a process waiting
> for I/O was in TASK_UNINTERRUPTIBLE and never get the signal you send
> it.
>
> Frank

I tried to SIGKILL the [nfsiod] process but it didn't get killed. I
also tried to kill the various rpcbind processes but it didn't change
anything.

I also tried autofs as Scott suggested, but the same problem occured
when I unplugged the network cable (most of the system hangs, can't
reboot nor halt). Here's how I configured autofs:

/etc/auto.misc:
bazinga -retry=1,rw,hard,size=8192,wsize=8192 192.168.2.77:/DataVolume/Public

/etc/auto.master:
/misc   /etc/auto.misc --timeout 20

Here's what I found in the syslog:

> Jan 23 22:59:17 cid kernel: [  510.944160] nfs: server 192.168.2.77 not 
> responding, still trying
> Jan 23 23:01:22 cid kernel: [  635.616161] nfs: server 192.168.2.77 not 
> responding, still trying
> Jan 23 23:01:46 cid sm-notify[841]: DNS resolution of Bazinga.local failed; 
> retrying later
> Jan 23 23:03:51 cid sm-notify[841]: DNS resolution of Bazinga.local failed; 
> retrying later
> Jan 23 23:05:56 cid sm-notify[841]: DNS resolution of Bazinga.local failed; 
> retrying later
> Jan 23 23:07:56 cid sm-notify[841]: Unable to notify Bazinga.local, giving up

I'm not sure why it's trying to resolve the "bazinga.local" name, and
even when it gave up with the resolution, it didn't unfreeze anything.
Also nfs seems to be still trying to reach the server (the cable was
unplugged at 22:56).

Thanks for your help,
Sylvain


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XFCE and automatic monitor detection

2012-01-23 Thread Mike Castle

This is mostly a laptop question, but probably general enough that I
want to post it here instead.

So one thing that I think Gnome2 had over XFCE is better multiple
monitor support. I could plug in a new monitor and the right thing
would just happen. More importantly, I could unplug the monitor, and
everything would automatically collapse down onto the laptop.
Particularly useful if your screen is now locked.

XFCE seems to have a different philosophy on this matter: use xrandr
(or similar).

Fine...OK... so rather than having to fire up arandr every time or
a script (tough to do if your screen is locked and the password
display is on the disconnected monitor), I'd like to have it happen
automatically.

So what kind of options do I have?

Some searching seems to indicate that it's a matter of polling.
Something akin to running xrandr -q every so often, and when a state
changes, do something appropriate. There seems to be a hint that some
sort of even could be fired and caught instead (via acpi, dbus, other
assorted buzzwords), but that maybe it doesn't really work.

Does there exist any software that I can just run at login time that I
can configure such that ``when you see these particular monitors
attached, switch into this mode.'' However it does that, I don't care
as long as it doesn't bog down the machine. And ideally work if a
monitor is unplugged when the machine is locked.

If not, what would be my approach for writing something for myself?

Thanks,
mrc

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