32GB limit per swap device?

[Holger Kipp]

Am 10.08.2011 um 10:09 schrieb Daniel Kalchev:

> On 10.08.11 10:47, Jeremy Chadwick wrote:
>> On Wed, Aug 10, 2011 at 10:13:14AM +0300, Daniel Kalchev wrote:
>>> I am more concerned that with 32GB of swap in single device I could not dump kernel core, with 64GB of RAM.
>> My apologies if I've misunderstood something, but why does this of any
>> concern?  Machine has 64GB RAM.  You have a single swap slice that's
>> effectively 32GB.  How is a kernel panic worth of 64GB RAM going to fit
>> into a 32GB swap slice?
>>
> The swap partitions are 64GB, it is only that FreeBSD refuses to use more than 32GB of each for swap. But.. it might happily dump core to the whole partition, tests will show.

I doubt it. Have you tried increasing kern.maxswzone? It is the size in KB (for 32GB it is set to 33554432).
kern.maxswzone: Maximum memory for swap metadata

Best regards,
Holger


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Holger Kipp
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