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SubjectRe: dbench on tmpfs OOM's
> meminfo.what?   Remember when I suggested that you put
> a testing mode into the numa code so that mortals could
> run numa builds on non-numa boxes?

NUMA aware meminfo is one of the patches you have sitting
in your tree. I haven't got around to the NUMA-sim yet ...
maybe after Halloween when management stop asking me to
get other bits of code in before the freeze ;-)

mbligh@larry:~$ cat /proc/meminfo.numa

Node 0 MemTotal: 4194304 kB
Node 0 MemFree: 3420660 kB
Node 0 MemUsed: 773644 kB
Node 0 HighTotal: 3418112 kB
Node 0 HighFree: 2737992 kB
Node 0 LowTotal: 776192 kB
Node 0 LowFree: 682668 kB

Node 1 MemTotal: 4147200 kB
Node 1 MemFree: 4116444 kB
Node 1 MemUsed: 30756 kB
Node 1 HighTotal: 4147200 kB
Node 1 HighFree: 4116444 kB
Node 1 LowTotal: 0 kB
Node 1 LowFree: 0 kB

Node 2 MemTotal: 4147200 kB
Node 2 MemFree: 4131816 kB
Node 2 MemUsed: 15384 kB
Node 2 HighTotal: 4147200 kB
Node 2 HighFree: 4131816 kB
Node 2 LowTotal: 0 kB
Node 2 LowFree: 0 kB

Node 3 MemTotal: 4147200 kB
Node 3 MemFree: 4128432 kB
Node 3 MemUsed: 18768 kB
Node 3 HighTotal: 4147200 kB
Node 3 HighFree: 4128432 kB
Node 3 LowTotal: 0 kB
Node 3 LowFree: 0 kB

>> Looks to me like it's just out of low memory:
>>
>> > LowFree: 1424 kB
>>
>> There is no low memory on anything but node 0 ...
>
> It was a GFP_HIGH allocation - just pagecache.

Ah, but what does a balance_classzone do on a NUMA box?
Once you've finished rototilling the code you're looking
at, I think we might have a better clue what it's supposed
to do, at least ...

M.
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