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dae3e9ea21
In the case of one pool being built on another pool, we want to make sure we don't end up throttling the lower (backing) pool when the upper pool is the majority contributor to dirty data. To insure we make forward progress during throttling, we also check the current pool's net dirty data and only throttle if it exceeds zfs_arc_pool_dirty_percent of the anonymous dirty data in the cache. Authored by: Don Brady <don.brady@delphix.com> Reviewed by: Sebastien Roy <sebastien.roy@delphix.com> Reviewed by: Matt Ahrens <matt@delphix.com> Reviewed by: Prashanth Sreenivasa <pks@delphix.com> Approved by: Robert Mustacchi <rm@joyent.com> Ported-by: Brian Behlendorf <behlendorf1@llnl.gov> Porting Notes: * The new global variables zfs_arc_dirty_limit_percent, zfs_arc_anon_limit_percent, and zfs_arc_pool_dirty_percent were intentially not added as tunable module parameters. OpenZFS-issue: https://illumos.org/issues/9465 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/d6a4c3ef Closes #7749 |
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