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Set initial arc_c to arc_c_min instead of arc_c_max. #10437

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Jun 17, 2020
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Set initial arc_c to arc_c_min instead of arc_c_max. #10437

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8 changes: 4 additions & 4 deletions module/zfs/arc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -4974,8 +4974,8 @@ arc_adapt(int bytes, arc_state_t *state)
* cache size, increment the target cache size
*/
ASSERT3U(arc_c, >=, 2ULL << SPA_MAXBLOCKSHIFT);
if (aggsum_compare(&arc_size, arc_c - (2ULL << SPA_MAXBLOCKSHIFT)) >=
0) {
if (aggsum_upper_bound(&arc_size) >=
arc_c - (2ULL << SPA_MAXBLOCKSHIFT)) {
atomic_add_64(&arc_c, (int64_t)bytes);
if (arc_c > arc_c_max)
arc_c = arc_c_max;
Expand Down Expand Up @@ -7078,7 +7078,7 @@ arc_tuning_update(boolean_t verbose)
(zfs_arc_max >= 64 << 20) && (zfs_arc_max < allmem) &&
(zfs_arc_max > arc_c_min)) {
arc_c_max = zfs_arc_max;
arc_c = arc_c_max;
arc_c = MIN(arc_c, arc_c_max);
arc_p = (arc_c >> 1);
if (arc_meta_limit > arc_c_max)
arc_meta_limit = arc_c_max;
Expand Down Expand Up @@ -7325,7 +7325,7 @@ arc_init(void)
arc_c_min = MAX(arc_c_max / 2, 2ULL << SPA_MAXBLOCKSHIFT);
#endif

arc_c = arc_c_max;
arc_c = arc_c_min;
arc_p = (arc_c >> 1);

/* Set min to 1/2 of arc_c_min */
Expand Down