re: NetBSD 10.0 - configure test process hang

[matthew green <mrg%eterna23.net@localhost>]

i wonder if this is KVA starvation.

i was just noticing that "pmap 0" on my ss20 is saying 209MB, and
while i forget exactly how that maps to the KVA limit of 224MB (some
of it may not be in the same region?), this seems close, and there is
a *lot* of free ram still, top says:

Memory: 156M Act, 9160K Inact, 9512K Wired, 7688K Exec, 136M File, 250M Free
Swap: 512M Total, 42M Used, 470M Free / Pools: 70M Used / Network: 5K In, 46K Out

anyway, a few years ago i was noticing that the system would hang a
bit under some types of load because of hitting the KVA limit, and
i wrote a patch to increase this by 128MB, though at that point my
ss20 stopped working right and i got distracted.

anyway, can you try this patch?

   https://www.netbsd.org/~mrg/sparc.starvation.v2.diff

it did get some decent testing a while ago, but i haven't yet booted
a new kernel with it now, though i have confirmed it builds.

it probably works for -10 branch too, as it was originaly worked on
before -10 actually branched.


.mrg.