https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224479

Mark Millard <mar...@dsl-only.net> changed:

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--- Comment #10 from Mark Millard <mar...@dsl-only.net> ---
(In reply to Peter Holm from comment #8)

I suggest seeing bugzilla 206048 about file
system based swap spaces hanging up. In
particular comments #7 and #8 that quote
Konstantin Belousov on the subject (or
reference his material).

Part of the text says:

As result, swapfile swapping is more prone to the trivial and unavoidable
deadlocks where the pagedaemon thread, which produces free memory, needs
more free memory to make a progress.  Swap write on the raw partition over
simple partitioning scheme directly over HBA are usually safe, while e.g.
zfs over geli over umass is the worst construction.

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