[Bug 228557] 11.2-RC2 excessive swapping (swap on zvol)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=228557

--- Comment #4 from Martin Birgmeier <d8zNeCFG at aon.at> ---
It seems that with this patch the ARC still grows until the system starts to
swap again.

"swapoff -a" results in "swapoff: /dev/mirror/swap: Cannot allocate memory"

In 11.1 this used to work.

Also, using "sysctl vfs.zfs.arc_max=xxxxxxxxxx" to reduce the size of the ARC
cache does not seem to free memory (top shows that wired memory remains
unchanged).

ZFS + swap is very broken under 11.2.

-- Martin

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