first half of new slab automover

If any slab classes have more than two pages worth of free chunks, attempt to
free one page back to a global pool.

Create new concept of a slab page move destination of "0", which is a global
page pool. Pages can be re-assigned out of that pool during allocation.

Combined with item rescuing from the previous patch, we can safely shuffle
pages back to the reassignment pool as chunks free up naturally. This should
be a safe default going forward. Users should be able to decide to free or
move pages based on eviction pressure as well. This is coming up in another
commit.

This also fixes a calculation of the NOEXP LRU size, and completely removes
the old slab automover thread. Slab automove decisions will now be part of the
lru maintainer thread.

1 files changed, 0 insertions, 1 deletions

diff --git a/items.h b/items.h
index f47de8f..4e492b4 100644
--- a/items.h
+++ b/items.h
@@ -27,7 +27,6 @@ item *do_item_get(const char *key, const size_t nkey, const uint32_t hv);
 item *do_item_touch(const char *key, const size_t nkey, uint32_t exptime, const uint32_t hv);
 void item_stats_reset(void);
 extern pthread_mutex_t lru_locks[POWER_LARGEST];
-void item_stats_evictions(uint64_t *evicted);
 
 enum crawler_result_type {
     CRAWLER_OK=0, CRAWLER_RUNNING, CRAWLER_BADCLASS, CRAWLER_NOTSTARTED