Kernel memory corruption(?) with age(4)

[Yamagi Burmeister]

On Wed, 30 Mar 2011, YongHyeon PYUN wrote:

>> Okay, I did a test run with RX checksum, TX checksum and both disabled.
>> In all three cases the crash occurs within about 20 minutes. I'm either
>> not sure that age(4) is the problem but it has definedly something to do
>> with the problem, since with another nic driver the same scenario is
>> rock solid...
>>
>
> OK.
>
>> The workload: It's a NFS3 server (FreeBSDs non-experimental
>> implementation), serving and receiving file with about 250 to 500
>> megabytes at about 20mb/s. The clients are FreeBSD 7 and 8 systems and
>> are mounting the shares via TCP. The connection is 1000mbit/s via a
>> "dumb" gigabit switch.
>>
>
> That's too broad to narrow down the issue. :-(
> I'm not sure but your box seem to have more than 4GB memory. Could
> you limit the available memory to 3GB via loader.conf and test it
> again?

All boxes are quadcore machines with 8GB RAM, running FreeBSD/amd64.
After limiting the memory via hw.physmem to 3GB the problems are gone.
The box is running crashfree for more than 6 hours and has served over
300GB of data via age(4).

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