diff options
Diffstat (limited to 'btr/btr0sea.c')
| -rw-r--r-- | btr/btr0sea.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/btr/btr0sea.c b/btr/btr0sea.c index 36dadd47e69..6628333d32a 100644 --- a/btr/btr0sea.c +++ b/btr/btr0sea.c @@ -46,6 +46,7 @@ Created 2/17/1996 Heikki Tuuri /** Flag: has the search system been enabled? Protected by btr_search_latch and btr_search_enabled_mutex. */ UNIV_INTERN char btr_search_enabled = TRUE; +UNIV_INTERN ibool btr_search_fully_disabled = FALSE; /** Mutex protecting btr_search_enabled */ static mutex_t btr_search_enabled_mutex; @@ -201,12 +202,19 @@ btr_search_disable(void) mutex_enter(&btr_search_enabled_mutex); rw_lock_x_lock(&btr_search_latch); + /* Disable access to hash index, also tell ha_insert_for_fold() + stop adding new nodes to hash index, but still allow updating + existing nodes */ btr_search_enabled = FALSE; /* Clear all block->is_hashed flags and remove all entries from btr_search_sys->hash_index. */ buf_pool_drop_hash_index(); + /* hash index has been cleaned up, disallow any operation to + the hash index */ + btr_search_fully_disabled = TRUE; + /* btr_search_enabled_mutex should guarantee this. */ ut_ad(!btr_search_enabled); @@ -225,6 +233,7 @@ btr_search_enable(void) rw_lock_x_lock(&btr_search_latch); btr_search_enabled = TRUE; + btr_search_fully_disabled = FALSE; rw_lock_x_unlock(&btr_search_latch); mutex_exit(&btr_search_enabled_mutex); @@ -1488,7 +1497,7 @@ btr_search_build_page_hash_index( rw_lock_x_lock(&btr_search_latch); - if (UNIV_UNLIKELY(!btr_search_enabled)) { + if (UNIV_UNLIKELY(btr_search_fully_disabled)) { goto exit_func; } @@ -1850,6 +1859,7 @@ function_exit: } } +#if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG /********************************************************************//** Validates the search system. @return TRUE if ok */ @@ -2019,3 +2029,4 @@ btr_search_validate(void) return(ok); } +#endif /* defined UNIV_AHI_DEBUG || defined UNIV_DEBUG */ |