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Introduce a tunable to exclude special class buffers from L2ARC

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Special allocation class or dedup vdevs may have roughly the same
performance as L2ARC vdevs. Introduce a new tunable to exclude those
buffers from being cacheable on L2ARC.

Reviewed-by: Don Brady <don.brady@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes #11761 
Closes #12285
This commit is contained in:
George Amanakis
2021-11-11 21:52:16 +01:00
committed by GitHub
parent 420b44488f
commit c9d62d1356
8 changed files with 119 additions and 21 deletions
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include/sys/arc.h
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@@ -85,6 +85,7 @@ typedef void arc_prune_func_t(int64_t bytes, void *priv);
/* Shared module parameters */
extern int zfs_arc_average_blocksize;
extern int l2arc_exclude_special;
/* generic arc_done_func_t's which you can use */
arc_read_done_func_t arc_bcopy_func;