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Revert "Allow arc_evict_ghost() to only evict meta data" 

Illumos 5497 "lock contention on arcs_mtx" reworks eviction and obviates
the need for this.

Signed-off-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Tim Chase 2015-01-23 08:08:14 -06:00 committed by Brian Behlendorf
parent f6b3b1f5d6
commit 97639d0a52
1 changed files with 11 additions and 15 deletions
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26
module/zfs/arc.c
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@ -498,8 +498,7 @@ static arc_buf_hdr_t arc_eviction_hdr;
static void arc_get_data_buf(arc_buf_t *buf);
static void arc_access(arc_buf_hdr_t *buf, kmutex_t *hash_lock);
static int arc_evict_needed(arc_buf_contents_t type);
static void arc_evict_ghost(arc_state_t *state, uint64_t spa, int64_t bytes,
arc_buf_contents_t type);
static void arc_evict_ghost(arc_state_t *state, uint64_t spa, int64_t bytes);
static void arc_buf_watch(arc_buf_t *buf);
static boolean_t l2arc_write_eligible(uint64_t spa_guid, arc_buf_hdr_t *ab);
@ -1945,7 +1944,6 @@ top:
* that evicting from the ghost list in this hot code path, leave
* this chore to the arc_reclaim_thread().
*/
return (stolen);
}
@ -1954,12 +1952,11 @@ top:
* bytes. Destroy the buffers that are removed.
*/
static void
arc_evict_ghost(arc_state_t *state, uint64_t spa, int64_t bytes,
arc_buf_contents_t type)
arc_evict_ghost(arc_state_t *state, uint64_t spa, int64_t bytes)
{
arc_buf_hdr_t *ab, *ab_prev;
arc_buf_hdr_t marker;
list_t *list = &state->arcs_list[type];
list_t *list = &state->arcs_list[ARC_BUFC_DATA];
kmutex_t *hash_lock;
uint64_t bytes_deleted = 0;
uint64_t bufs_skipped = 0;
@ -2094,7 +2091,7 @@ arc_adjust(void)
if (adjustment > 0 && arc_mru_ghost->arcs_size > 0) {
delta = MIN(arc_mru_ghost->arcs_size, adjustment);
arc_evict_ghost(arc_mru_ghost, 0, delta, ARC_BUFC_DATA);
arc_evict_ghost(arc_mru_ghost, 0, delta);
}
adjustment =
@ -2102,7 +2099,7 @@ arc_adjust(void)
if (adjustment > 0 && arc_mfu_ghost->arcs_size > 0) {
delta = MIN(arc_mfu_ghost->arcs_size, adjustment);
arc_evict_ghost(arc_mfu_ghost, 0, delta, ARC_BUFC_DATA);
arc_evict_ghost(arc_mfu_ghost, 0, delta);
}
}
@ -2231,15 +2228,14 @@ restart:
if (adjustmnt > 0 && arc_mru_ghost->arcs_lsize[type] > 0) {
delta = MIN(adjustmnt,
arc_mru_ghost->arcs_lsize[type]);
arc_evict_ghost(arc_mru_ghost, 0, delta, type);
adjustmnt -= delta;
arc_mru_ghost->arcs_lsize[ARC_BUFC_METADATA]);
arc_evict_ghost(arc_mru_ghost, 0, delta);
}
if (adjustmnt > 0 && arc_mfu_ghost->arcs_lsize[type] > 0) {
delta = MIN(adjustmnt,
arc_mfu_ghost->arcs_lsize[type]);
arc_evict_ghost(arc_mfu_ghost, 0, delta, type);
arc_mfu_ghost->arcs_lsize[ARC_BUFC_METADATA]);
arc_evict_ghost(arc_mfu_ghost, 0, delta);
}
/*
@ -2301,8 +2297,8 @@ arc_flush(spa_t *spa)
break;
}
arc_evict_ghost(arc_mru_ghost, guid, -1, ARC_BUFC_DATA);
arc_evict_ghost(arc_mfu_ghost, guid, -1, ARC_BUFC_DATA);
arc_evict_ghost(arc_mru_ghost, guid, -1);
arc_evict_ghost(arc_mfu_ghost, guid, -1);
mutex_enter(&arc_reclaim_thr_lock);
arc_do_user_evicts();