Re: Question about system lock-ups

[Edward Shishkin <edward.shishkin@gmail.com>]

Eddie Atherton wrote:

> Hi,


Hello.

>
> I don't think this issue is reiser related, but I thought I'd bounce 
> it here, in case anyone might be able to shed light on it, based on 
> the symptoms.
>
> Yesterday, for the 3nd time, my system "kind of" locked up. Each time 
> this has happened, it's been after around a month of up-time, and all 
> times were at odd hours, so the system wasn't being used much, so I 
> don't think it's temperature related, otherwise I'd get them during 
> the day, when I am using the system heavily.
>

I had something similar on my dual athlon 1700+ box.
Getting rid of case has fixed the problem, so I didn't
investigate this further ;)

> OK, the symptoms are this. On the monitor I can see my screensaver, 
> <http://www.linuxquestions.org/questions/#>but it's not "in motion". 
> The keyboard and mouse don't work. I can't connect by ssh or VNC, 
> <http://www.linuxquestions.org/questions/#> but neither actually time 
> out, they just hang. Requests to DHCP hang. BUT, the system is still 
> running, because it acts as a server/gateway for the rest of the 
> machines in the house, and they can connect to the internet 
> <http://www.linuxquestions.org/questions/#>without problems. I can 
> surf the web, I can send and receive e-mails, anything but connect 
> directly to the server. <http://www.linuxquestions.org/questions/#>
>
> The only way to get the system to respond, is the "big red button". On 
> restart, and here's why I'm trying this list for ideas, is that I 
> noticed, again each time, is hundreds and hundreds, if not thousands 
> of messages showing reiser replaying transactions. It takes, 
> sometimes, nearly 5 minutes for this to complete.  What kind of issue 
> could cause all of these transactions to be replayed.


For example, pushing the "big red button" when write is in progress..

>
> Examining the logs doesn't show anything, except that all logging 
> appears to stop at the same point in time, which I think is when the 
> "issue", whatever it is, occurs, because the time was around 4 hours 
> before I noticed the lock-up.
>
> thought about a drive issue, but smartd isn't reporting any problems, 
> normally, or via short/long self-tests. Plus, I'd expect some 
> "failure" messages at some point, not just a lock-up.
>
> Lastly, here's the only relevant message I could find in dmesg, from 
> the resultant boot:
>
> ReiserFS: hda2: checking transaction log (hda2)
> ReiserFS: hda2: replayed 1125 transactions in 67 seconds
>
> Now, here's the really weird part.  hda2 is an UNUSED partition.  It 
> isn't mounted on the system:
>
> Filesystem            Size  Used Avail Use% Mounted on
> /dev/hda1             9.3G  3.5G  5.9G  37% /
> /dev/hdb2             187G  164G   24G  88% /usr/local/NotYet
> /dev/hdb3              47G   18G   30G  37% /usr/local/Apps
> /dev/sda5             233G  140G   93G  61% /usr/local/Music
> /dev/sda6             233G  173G   60G  75% /usr/local/Backup
> tmpfs                 256M   68K  256M   1% /tmp
>
> Any thoughts on what might be causing this, and more importantly, how 
> to track down the culprit.
>
> Cheers,
> Eddie
>
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