zfs vs. armv7 (32-bit more generally?): "ZFS NOTICE: KSTACK_PAGES is 2 which could result in stack overflow panic!"

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From: Mark Millard via arm <arm_at_freebsd.org>
Date: Sun, 14 Nov 2021 00:26:05 UTC

I happend to type:

zpool iostat -r

into an armv7 system's ssh window by accident and its
serial console reported:

ZFS NOTICE: KSTACK_PAGES is 2 which could result in stack overflow panic!
Please consider adding 'options KSTACK_PAGES=4' to your kernel config
ZFS filesystem version: 5
ZFS storage pool version: features support (5000)

For reference:

# uname -apKU
FreeBSD OPiP2E_RPi2v11 14.0-CURRENT FreeBSD 14.0-CURRENT #14 main-n250455-890cae197737-dirty: Thu Nov  4 16:13:56 PDT 2021     root@CA72_16Gp_ZFS:/usr/obj/BUILDs/main-CA7-nodbg-clang/usr/main-src/arm.armv7/sys/GENERIC-NODBG-CA7  arm armv7 1400040 1400040

(The boot media was on the OrangePi+2e system, not a RPi2 v1.1 system.)

===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)