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b27a87f399
Under heavy metadata load, metadata passes can monopolize the write budget every cycle while data passes get nothing written. Track consecutive monopolized cycles per device in l2ad_meta_cycles. After l2arc_meta_cycles (default 2) consecutive cycles where metadata fills the write budget, skip metadata for one cycle to let data run. Reset the counter when nothing is written. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com> Signed-off-by: Ameer Hamza <ahamza@ixsystems.com> Closes #18289 |
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