[Lustre-discuss] client randomly evicted

[Robin Humble]

On Fri, May 02, 2008 at 03:16:31PM -0700, Andreas Dilger wrote:
>On Apr 30, 2008  11:40 -0400, Aaron Knister wrote:
>> Some more information that might be helpful. There is a particular code 
>> that one of our users runs. Personally after the trouble this code has 
>> caused us we'd like to hand him a calculator and disable his accounts but 
>> sadly that's not an option. Since the time of the hang, there is what seems 
>> to be one process associated with lustre that is running as the userid of 
>> the problem user- "ll_sa_15530". A trace of this process in its current 
>> state shows this -
>>
>> Is this a problem with the lustre readahead code? If so would this fix it? 
>> "echo 0 > /proc/fs/lustre/llite/*/statahead_count "
>
>Yes, this appears to be a statahead problem.  There were fixes added to
>1.6.5 that should resolve the problems seen with statahead.  In the meantime
>I'd recommend disabling it as you suggest above.

we're seeing the same problem.

I think the workaround should be:
  echo 0 > /proc/fs/lustre/llite/*/statahead_max
??

/proc/fs/lustre/llite/*/statahead_count is -r--r--r--

cheers,
robin

ps. sorry I've been too busy this week to look at the llite_lloop stuff.