Re: SV: Lockups with 2.4.14 and 2.4.16

[Hans Reiser <reiser@namesys.com>]

Johan Ekenberg wrote:

>>>## Kernel:
>>> - 2.4.14 and 2.4.16
>>> - Patched for reiserfs-quota with patches found at
>>>   ftp://ftp.suse.com/pub/people/mason/patches/reiserfs/quota-2.4/
>>>     ( * 50_quota-patch
>>>       * dquota_deadlock
>>>       * nesting
>>>       * reiserfs-quota )
>>>
>>For the 2.4.16 kernel, you used the quota patches from my 2.4.16 dir?
>>
>
>Yes.
>
>>The fastest way to rule out filesystem deadlocks is to hook up a serial
>>console and send me the decoded output of sysrq-t.
>>
>
>I'll look into this. A bit of a problem since there are 10 servers and you
>never know which one is going to lockup next time. Do I really need 10 PC's
>to monitor them simultaneously or could it be done more efficiently? I'm no
>kernel hacker, any pointers as to what tools to use etc would be most
>welcome.
>
>Thanks,
>/Johan Ekenberg
>
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You need ten serial ports.  Actually, a lot of machine rooms have all 
their servers connected via serial lines to one machine (or at least 
this was true years ago when I was a sysadmin).  It makes it a lot 
easier to administer them by remote access from home in the middle of 
the night.

Hans