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Ameer Hamza
13552d754f
Add four new functional tests to validate L2ARC DWPD rate limiting and parallel write features: - l2arc_dwpd_ratelimit_pos: Verifies DWPD rate limiting with different values (0, 100, 1000, 10000) and ordering - l2arc_dwpd_reimport_pos: Verifies DWPD rate limiting persists after pool export/import - l2arc_multidev_scaling_pos: Verifies parallel write scaling ratio (dual devices achieve ~2× single device throughput) - l2arc_multidev_throughput_pos: Verifies absolute parallel write throughput scales with device count (~32MB/s per device) Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ameer Hamza <ahamza@ixsystems.com> Closes #18093