[Bug 254721] Swap on ZFS can crash server in high memory usage conditions

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 07 Mar 2022 15:06:09 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254721

crest@rlwinm.de changed:

           What    |Removed                     |Added
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                 CC|                            |crest@rlwinm.de

--- Comment #4 from crest@rlwinm.de ---
The (long and) short of it is: writing to ZFS can require heap allocations
making ZVOLs unsuitable as swap devices (swapping to normal files on ZFS mounts
would be even worse).

The only reliable solution is to use something simpler as swap space e.g. a
gmirror+geli partition. I know this sucks if you have no space left on your
disks.

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