Add missing arcstats

The following useful values were missing the arcstats.  This change
adds them in to provide greater visibility in to the arcs behavior.

arc_no_grow                     4    0
arc_tempreserve                 4    0
arc_loaned_bytes                4    0
arc_meta_used                   4    624774592
arc_meta_limit                  4    400785408
arc_meta_max                    4    625594176

diff --git a/module/zfs/arc.c b/module/zfs/arc.c
index 3a45730..63b659b 100644 (file)
--- a/module/zfs/arc.c
+++ b/module/zfs/arc.c
@@ -282,6 +282,12 @@ typedef struct arc_stats {
        kstat_named_t arcstat_l2_size;
        kstat_named_t arcstat_l2_hdr_size;
        kstat_named_t arcstat_memory_throttle_count;
+       kstat_named_t arcstat_no_grow;
+       kstat_named_t arcstat_tempreserve;
+       kstat_named_t arcstat_loaned_bytes;
+       kstat_named_t arcstat_meta_used;
+       kstat_named_t arcstat_meta_limit;
+       kstat_named_t arcstat_meta_max;
 } arc_stats_t;
 
 static arc_stats_t arc_stats = {
@@ -337,7 +343,13 @@ static arc_stats_t arc_stats = {
        { "l2_io_error",                KSTAT_DATA_UINT64 },
        { "l2_size",                    KSTAT_DATA_UINT64 },
        { "l2_hdr_size",                KSTAT_DATA_UINT64 },
-       { "memory_throttle_count",      KSTAT_DATA_UINT64 }
+       { "memory_throttle_count",      KSTAT_DATA_UINT64 },
+       { "arc_no_grow",                KSTAT_DATA_UINT64 },
+       { "arc_tempreserve",            KSTAT_DATA_UINT64 },
+       { "arc_loaned_bytes",           KSTAT_DATA_UINT64 },
+       { "arc_meta_used",              KSTAT_DATA_UINT64 },
+       { "arc_meta_limit",             KSTAT_DATA_UINT64 },
+       { "arc_meta_max",               KSTAT_DATA_UINT64 },
 };
 
 #define        ARCSTAT(stat)   (arc_stats.stat.value.ui64)
@@ -399,13 +411,12 @@ static arc_state_t        *arc_l2c_only;
 #define        arc_c           ARCSTAT(arcstat_c)      /* target size of cache */
 #define        arc_c_min       ARCSTAT(arcstat_c_min)  /* min target cache size */
 #define        arc_c_max       ARCSTAT(arcstat_c_max)  /* max target cache size */
-
-static int             arc_no_grow;    /* Don't try to grow cache size */
-static uint64_t                arc_tempreserve;
-static uint64_t                arc_loaned_bytes;
-static uint64_t                arc_meta_used;
-static uint64_t                arc_meta_limit;
-static uint64_t                arc_meta_max = 0;
+#define        arc_no_grow     ARCSTAT(arcstat_no_grow)
+#define        arc_tempreserve ARCSTAT(arcstat_tempreserve)
+#define        arc_loaned_bytes        ARCSTAT(arcstat_loaned_bytes)
+#define        arc_meta_used   ARCSTAT(arcstat_meta_used)
+#define        arc_meta_limit  ARCSTAT(arcstat_meta_limit)
+#define        arc_meta_max    ARCSTAT(arcstat_meta_max)
 
 typedef struct l2arc_buf_hdr l2arc_buf_hdr_t;
 
@@ -3499,6 +3510,7 @@ arc_init(void)
 
        /* limit meta-data to 1/4 of the arc capacity */
        arc_meta_limit = arc_c_max / 4;
+       arc_meta_max = 0;
 
        /* Allow the tunable to override if it is reasonable */
        if (zfs_arc_meta_limit > 0 && zfs_arc_meta_limit <= arc_c_max)