RPI3 swap experiments (grace under pressure)

[John-Mark Gurney]

Mark Millard via freebsd-arm wrote this message on Wed, Aug 15, 2018 at 07:39 -0700:
> On 2018-Aug-14, at 5:20 PM, Trev <freebsd-arm at sentry.org> wrote:
> 
> > George Mitchell wrote on 15/08/2018 08:33:
> >> On 08/14/18 18:17, Jedi Tek'Unum wrote:
> >>> I firmly disagree with the entire concept of out of memory killers. They are simply evil and in my opinion a complete cop-out. I first encountered this kind of kludge back in the ???80s with AIX. It was bad then and it still is today. Frankly I find it ridiculous that they still exist.
> >>> [...]
> >> However: consider the subject (Raspberry Pi).               -- George
> > 
> > When researching whether 512M of RAM was considered "usable" for a FreeBSD buildworld, I came across [https://reviews.freebsd.org/D8302] from October 2016 where just 256M was considered a test case for i386 and amd64 (-j1 I'm assuming) buildworlds which should succeed.
> 
> What I see there is pho writing:
> 
> QUOTE
> I have run stress2 testes on i386 and amd64.
> I ran a buildkernel on both i386 and amd64 with 256MB RAM / UP.
> Buildworld was run with various small RAM configurations.
> END QUOTE
> 
> It explicitly lists buildkernel for 256 MiBytes of RAM, not
> buildworld. I'm not sure what the "UP" is for. "RAM / UP"
> looks like it might be a ratio  but may be it was indicating
> not SMP? It not clear if this buildkernel testing included
> kernel-toolchain as well.

UP mean Uniprocessor, or no -j flag...

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."