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Existing cache_settings field displays the settings which are saved in metadata. Add new kernel_cache_settings fields to display the settings which are currently used by kernel, including fields for which default values are used. This way users have complete view of the set of cache settings supported (and which they can set) and their values which are used at the moment by kernel. For example: $ lvs -o name,cache_policy,cache_settings,kernel_cache_settings vg LV Cache Policy Cache Settings KCache Settings cached1 mq migration_threshold=1024,write_promote_adjustment=2 migration_threshold=1024,random_threshold=4,sequential_threshold=512,discard_promote_adjustment=1,read_promote_adjustment=4,write_promote_adjustment=2 cached2 smq migration_threshold=1024 migration_threshold=1024 cached3 smq migration_threshold=2048