Re: Mem issues in 2.6.9 (ever since 2.6.9-rc3) and possible cause

[Andrew Morton]

Javier Marcet <javier@xxxxxxxxxxx> wrote:
>
> I've been following quite closely the development of 2.6.9, testing
>  every -rc release and a lot of -bk's.
> 
>  Upon changing from 2.6.9-rc2 to 2.6.9-rc3 I began experiencing random
>  oom kills whenever a high memory i/o load took place.

Do you have swap online?

What sort of machine is it, and how much memory has it?

>  This happened with plenty of free memory, and with whatever values I
>  used for vm.overcommit_ratio and vm.overcommit_memory
>  Doubling the physical RAM didn't change the situation either.
> 
>  Having traced the problem to 2.6.9-rc3, I took a look at the differences
>  in memory handling between 2.6.9-rc2 and 2.6.9-rc3 and with the attached
>  patch I have no more oom kills. Not a single one.
> 
>  I'm not saying everything within the patch is needed, not even that it's
>  the right thing to change. Nonetheless, 2.6.9 vanilla was unusable,
>  while this avoids those memory leaks.

That patch only affects NUMA machines?
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