RPI3 swap experiments, was Re: GPT vs MBR for swap devices

[bob prohaska]

On Mon, Jul 02, 2018 at 08:31:10AM +0100, Jamie Landeg-Jones wrote:
> 
> 
> It was the RPI2 that gave me vfs errors under load - the RPI3 I couldn't get
> to boot at all.
> 
> The good new, is, I have loaded the latest image,
> FreeBSD-12.0-CURRENT-arm64-aarch64-RPI3-20180628-r335760.img and it loads fine.
> 
> As such I have a virgin RPI3 with new sdcard, and a new USB stick, and I'm
> willing to configure it however you want, to help the testing.
> 
> What do you think would be the best things to do next? Try and emulate Bobs
> problem, or try some other stress tests?
> 

I have the same snapshot building world with swap, var, tmp and usr on a
Sandisk SDCZ80-064G usb stick. Swap is 3 GB, in 3 partitions of 1 GB each.
A -j4 buildworld is running, it's apt to finish shortly.  Running a similar 
test couldn't hurt if no better ideas come along. Adding swap to the microSD
card would put you a step ahead of me.

If you could get your hands on a Sandisk SDCZ800-064G it would be especially
interesting; that's the usb stick that started this goosechase.

Hopefully somebody will have better ideas....

bob prohaska