[Bug 250323] OpenZFS L2ARC size shrinking over time

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D250323

--- Comment #7 from Stefan E=C3=9Fer <[email protected]> ---
(In reply to Nick Price from comment #6)

I have locally applied the patch from review D58346 and it seems to have fi=
xed
the issue for me.

It has also significantly improved the hit ratio and effectiveness of the L=
2ARC
in my use case.

It seems the cache device needs to be destroyed and the attached to the pool
again to start from a clean state to avoid getting bad checksums after appl=
ying
this patch. (I did not and it took several reboots to get the L2ARC into a
state that uses the full capacity and does not report checksum errors.)

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