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797f55ef12
In the zfs_id_over*quota functions, there is a short-circuit to skip the zap_lookup when the quota zap does not exist. If quotas are never used in a zpool, then the quota zap will never exist. But if user/group/project quotas are ever used, the zap objects will be created and will persist even if the quotas are deleted. The quota zap_lookup in the write path can become a bottleneck for write-heavy small I/O workloads. Before this commit, it was not possible to remove this lookup without creating a new zpool. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Sam Atkinson <samatk@amazon.com> Closes #14721 |
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