[ts-7000] Re: Only half of RAM available?

["Julien" <>]

Hi

I know that it's an (very) old thread, but I meet the same problem.
I use a TS7200 (with TS8), and my program creates huge table of structure (more than 8MB). The result is that the message "__alloc_pages: 0-order allocation failed" appears...whereas about 10MB are always free.
>               total                used              free                shared         buffers
Mem:        28684           17816           10868                   0                       32

I have some questions about this, maybe someone will be able to help me :
- I use TS8 (with adeos patch & RTAI), I read that there were bugs regarding "OOM linux killer" with kernel 2.4, and that these bugs seem to be fixed with TS10. Does my problem come from this ? Will it be fixed if I use TS10 ?

- Why the other half of 16MB memory doesn't seem to be used ? I understand that the first part is full with linux and my program, but why does it not switch automaticly to the other free half ? Is it linked to the "mlockall" command that I currently use in my program ? 
mlockall(MCL_CURRENT | MCL_FUTURE);

Thanks for any help, I'm a bit lost... and I really need all the memory for my application.

Regards.

Julien

--- In  "appassionata6" <> wrote:
>
> I am experimenting with a TS-7200 with 32MB RAM, and a TS-7250 with
> 64MB of RAM. Both boards are prone to, at times, emitting tons of
> messages like:
> 
>         __alloc_pages: 0-order allocation failed (gfp=0x1d2/0)
> 
> This has been discussed here before. The boards are running out of
> memory, of course. This happens always with apt-get. If I use a USB
> swap partition and it doesn't happen.
> 
> The strange thing is, I noticed that the allocation failed messages
> seem to happen when RAM is only half full. This is my TS-7200 while
> failing:
> 
> 
>              total       used       free     shared    buffers     cached
> Mem:         28712      17768      10944          0          0       1636
> -/+ buffers/cache:      16132      12580
> Swap:            0          0          0
> 
> and this is my TS-7250:
> 
>              total       used       free     shared    buffers     cached
> Mem:         60752      31976      28776          0          0      16768
> -/+ buffers/cache:      15208      45544
> Swap:            0          0          0
> 
> Is it really the case that I am only able to access half of the RAM?
> Does anyone understand what's happening here?
> 
> Please help! Thanks,
> 
> Derek Dolney
> Micromeritics Instrument Corp.
>

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