set zfs_arc_shrinker_limit to 0 by default #16909
Merged
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zfs_arc_shrinker_limit
was introduced to avoid ARC collapse due to aggressive kernel reclaim. While useful, the current default (10000) is too prone to OOM especially when MGLRU-enabled kernels with defaultmin_ttl_ms
are used. Even when no OOM happens, it often causes too much swap usage.This patch sets
zfs_arc_shrinker_limit=0
to not ignore kernel reclaim requests. ARC now plays better with both kernel shrinker and pagecache but, should ARC collapse happen again, MGLRU behavior can be tuned or even disabled.Anyway, zfs should not cause OOM when ARC can be released.
Motivation and Context
See above.
Description
See above.
How Has This Been Tested?
Types of changes
Checklist:
Signed-off-by
.