[Bug 199189] SWAP on ZFS can crash server

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=199189

--- Comment #11 from marcus at blazingdot.com ---
> Have You tried the 'perl' one? (not mine unfortunatelly, got it from someone)

I ran it a few times (it is quite fast.) right in the middle of a 'make -j16
buildkernel' compile with several Chrome windows up.  No problems, process is
killed when swap is exhausted.  Aside from setting the properties on the
zroot/swap dataset, I have done no zfs-related tuning.

I'm running recent -CURRENT on amd64 with 8GB RAM, 2GB swap zvol on an SSD.

Swap on zvol has been rock solid for me since I started using it again after
the ARC/UMA rebalance/low memory handling fix that happened last year. I would
be happy to tweak things to try to get it to crash if you have some tunables
that you would like to test.

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