diff options
Diffstat (limited to 'storage/xtradb/include/buf0flu.ic')
| -rw-r--r-- | storage/xtradb/include/buf0flu.ic | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/storage/xtradb/include/buf0flu.ic b/storage/xtradb/include/buf0flu.ic new file mode 100644 index 00000000000..06fa49754cd --- /dev/null +++ b/storage/xtradb/include/buf0flu.ic @@ -0,0 +1,167 @@ +/***************************************************************************** + +Copyright (c) 1995, 2009, Oracle and/or its affiliates. All Rights Reserved. + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free Software +Foundation; version 2 of the License. + +This program is distributed in the hope that it will be useful, but WITHOUT +ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA + +*****************************************************************************/ + +/**************************************************//** +@file include/buf0flu.ic +The database buffer pool flush algorithm + +Created 11/5/1995 Heikki Tuuri +*******************************************************/ + +#ifndef UNIV_HOTBACKUP +#include "buf0buf.h" +#include "mtr0mtr.h" +#include "srv0srv.h" + +/********************************************************************//** +Inserts a modified block into the flush list. */ +UNIV_INTERN +void +buf_flush_insert_into_flush_list( +/*=============================*/ + buf_pool_t* buf_pool, /*!< buffer pool instance */ + buf_block_t* block, /*!< in/out: block which is modified */ + lsn_t lsn); /*!< in: oldest modification */ +/********************************************************************//** +Inserts a modified block into the flush list in the right sorted position. +This function is used by recovery, because there the modifications do not +necessarily come in the order of lsn's. */ +UNIV_INTERN +void +buf_flush_insert_sorted_into_flush_list( +/*====================================*/ + buf_pool_t* buf_pool, /*!< buffer pool instance */ + buf_block_t* block, /*!< in/out: block which is modified */ + lsn_t lsn); /*!< in: oldest modification */ + +/********************************************************************//** +This function should be called at a mini-transaction commit, if a page was +modified in it. Puts the block to the list of modified blocks, if it is not +already in it. */ +UNIV_INLINE +void +buf_flush_note_modification( +/*========================*/ + buf_block_t* block, /*!< in: block which is modified */ + mtr_t* mtr) /*!< in: mtr */ +{ + buf_pool_t* buf_pool = buf_pool_from_block(block); + + ut_ad(!srv_read_only_mode); + ut_ad(buf_block_get_state(block) == BUF_BLOCK_FILE_PAGE); + ut_ad(block->page.buf_fix_count > 0); +#ifdef UNIV_SYNC_DEBUG + ut_ad(rw_lock_own(&(block->lock), RW_LOCK_EX)); +#endif /* UNIV_SYNC_DEBUG */ + + ut_ad(!buf_flush_list_mutex_own(buf_pool)); + ut_ad(!mtr->made_dirty || log_flush_order_mutex_own()); + + ut_ad(mtr->start_lsn != 0); + ut_ad(mtr->modifications); + + mutex_enter(&block->mutex); + ut_ad(block->page.newest_modification <= mtr->end_lsn); + + block->page.newest_modification = mtr->end_lsn; + + if (!block->page.oldest_modification) { + ut_a(mtr->made_dirty); + ut_ad(log_flush_order_mutex_own()); + buf_flush_insert_into_flush_list( + buf_pool, block, mtr->start_lsn); + } else { + ut_ad(block->page.oldest_modification <= mtr->start_lsn); + } + + mutex_exit(&block->mutex); + + srv_stats.buf_pool_write_requests.inc(); +} + +/********************************************************************//** +This function should be called when recovery has modified a buffer page. */ +UNIV_INLINE +void +buf_flush_recv_note_modification( +/*=============================*/ + buf_block_t* block, /*!< in: block which is modified */ + lsn_t start_lsn, /*!< in: start lsn of the first mtr in a + set of mtr's */ + lsn_t end_lsn) /*!< in: end lsn of the last mtr in the + set of mtr's */ +{ + buf_pool_t* buf_pool = buf_pool_from_block(block); + + ut_ad(!srv_read_only_mode); + ut_ad(buf_block_get_state(block) == BUF_BLOCK_FILE_PAGE); + ut_ad(block->page.buf_fix_count > 0); +#ifdef UNIV_SYNC_DEBUG + ut_ad(rw_lock_own(&(block->lock), RW_LOCK_EX)); +#endif /* UNIV_SYNC_DEBUG */ + + ut_ad(!buf_flush_list_mutex_own(buf_pool)); + ut_ad(log_flush_order_mutex_own()); + + ut_ad(start_lsn != 0); + ut_ad(block->page.newest_modification <= end_lsn); + + mutex_enter(&block->mutex); + block->page.newest_modification = end_lsn; + + if (!block->page.oldest_modification) { + buf_flush_insert_sorted_into_flush_list( + buf_pool, block, start_lsn); + } else { + ut_ad(block->page.oldest_modification <= start_lsn); + } + + mutex_exit(&block->mutex); + +} +#endif /* !UNIV_HOTBACKUP */ + +/******************************************************************//** +Check if a flush list flush is in progress for any buffer pool instance, or if +all the instances are clean, for heuristic purposes. +@return true if flush list flush is in progress or buffer pool is clean */ +UNIV_INLINE +bool +buf_flush_flush_list_in_progress(void) +/*==================================*/ +{ + bool all_clean = true; + + for (ulint i = 0; i < srv_buf_pool_instances; i++) { + + const buf_pool_t* buf_pool = buf_pool_from_array(i); + if (buf_pool->init_flush[BUF_FLUSH_LIST] + || buf_pool->n_flush[BUF_FLUSH_LIST]) { + + return(true); + } + + if (all_clean) { + + all_clean = (UT_LIST_GET_LEN(buf_pool->flush_list) + == 0); + } + + } + return(all_clean); +} |