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L2ARC: Restrict write size to 1/4 of the device #15519

Merged
merged 1 commit into from
Nov 14, 2023
Merged

L2ARC: Restrict write size to 1/4 of the device #15519

merged 1 commit into from
Nov 14, 2023

Commits on Nov 14, 2023

  1. L2ARC: Restrict write size to 1/4 of the device 

    PR openzfs#15457 exposed weird logic in L2ARC write sizing. If it appeared
bigger than device size, instead of liming write it reset all the
system-wide tunables to their default.  Aside of being excessive,
it did not actually help with the problem, still allowing infinite
loop to happen.

This patch removes the tunables reverting logic, but instead limits
L2ARC writes (or at least eviction/trim) to 1/4 of the capacity.

Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
    @amotin
    amotin committed Nov 14, 2023
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