Re: Allocation failures

What memory option did you use to compile the kernel? I was told that  
64 GB HIMEM is not supported, so I'm now running with the 4 GB option  
(which in fact does not allow me to use the full memory of my  
machines :-( Since I used the 4 GB option I did not encounter any  
problems anymore (I has stability problems with 64 GB ...)

Jürgen

Le 4 juin 07 à 11:54, Ralf Oelschlaegel a écrit :

> David Brodbeck schrieb:
>> I'm managing an OpenMosix cluster, running kernel 2.4.26-om1 on
>> Debian Sarge.  After the head node has been up for a couple of weeks
>> I start seeing a lot of allocation failure messages in the kernel
>> logs.  The situation eventually deteriorates to the point where the
>> machine is unusable -- all attempts to launch processes end with fork
>> reporting allocation failures.  The problem does not appear to be
>> memory exhaustion; the machine has 4 GiB of RAM and never uses more
>> than 100 megabytes or so of swap.
>>
>> Has anyone else seen this problem?  Is this the infamous Linux 2.4.x
>> 'memory fragmentation' issue rearing its ugly head?  Is there a fix?
> we use the same kernel on SuSE8.2 system and we have the same  
> problem. After one
> month I have to reboot the master node and I think the problem is  
> memory
> fragmantation (see memory/rawmemory on master by mosmon).
> Our "workaround" is checkpoint/restart for long running jobs.
>
> Ralf
>
>
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