Merge lp:~percona-dev/percona-server/5.1.57-minimize_buf_pool_shm into lp:percona-server/5.1

[Yasufumi Kinoshita]

invalidate the options added by innodb_buffer_pool_shm.patch
chunk size alignment is remained for compatibility

[Stewart Smith (stewart)]

http://jenkins.percona.com/view/Percona%20Server%205.1/job/percona-server-5.1-param/15/

(running build)

=== modified file 'innodb_buffer_pool_shm.patch'
--- innodb_buffer_pool_shm.patch	2011-05-10 07:31:20 +0000
+++ innodb_buffer_pool_shm.patch	2011-06-21 09:06:00 +0000
@@ -8,300 +8,20 @@
 diff -ruN a/storage/innodb_plugin/buf/buf0buf.c b/storage/innodb_plugin/buf/buf0buf.c
 --- a/storage/innodb_plugin/buf/buf0buf.c	2010-07-14 16:32:49.669501663 +0900
 +++ b/storage/innodb_plugin/buf/buf0buf.c	2010-07-14 16:40:16.149438645 +0900
-@@ -53,6 +53,10 @@
- #include "page0zip.h"
- #include "trx0trx.h"
- #include "srv0start.h"
-+#include "que0que.h"
-+#include "read0read.h"
-+#include "row0row.h"
-+#include "ha_prototypes.h"
- 
- /* prototypes for new functions added to ha_innodb.cc */
- trx_t* innobase_get_trx();
-@@ -310,6 +314,30 @@
- UNIV_INTERN ibool		buf_debug_prints = FALSE;
- #endif /* UNIV_DEBUG */
- 
-+/* Buffer pool shared memory segment information */
-+typedef	struct buf_shm_info_struct	buf_shm_info_t;
-+
-+struct buf_shm_info_struct {
-+	char	head_str[8];
-+	ulint	binary_id;
-+	ibool	is_new;		/* during initializing */
-+	ibool	clean;		/* clean shutdowned and free */
-+	ibool	reusable;	/* reusable */
-+	ulint	buf_pool_size;	/* backup value */
-+	ulint	page_size;	/* backup value */
-+	ulint	frame_offset;	/* offset of the first frame based on chunk->mem */
-+	ulint	zip_hash_offset;
-+	ulint	zip_hash_n;
-+
-+	ulint	checksum;
-+
-+	buf_pool_t	buf_pool_backup;
-+	buf_chunk_t	chunk_backup;
-+
-+	ib_uint64_t	dummy;
-+};
-+
-+#define BUF_SHM_INFO_HEAD "XTRA_SHM"
- #endif /* !UNIV_HOTBACKUP */
- 
- /********************************************************************//**
-@@ -756,6 +784,45 @@
- #endif /* UNIV_SYNC_DEBUG */
- }
- 
-+static
-+void
-+buf_block_reuse(
-+/*============*/
-+	buf_block_t*	block,
-+	ptrdiff_t	frame_offset)
-+{
-+	/* block_init */
-+	block->frame += frame_offset;
-+
-+	UNIV_MEM_DESC(block->frame, UNIV_PAGE_SIZE, block);
-+
-+	block->index = NULL;
-+
-+#ifdef UNIV_DEBUG
-+	/* recreate later */
-+	block->page.in_page_hash = FALSE;
-+	block->page.in_zip_hash = FALSE;
-+#endif /* UNIV_DEBUG */
-+
-+#if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
-+	block->n_pointers = 0;
-+#endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */
-+
-+	if (block->page.zip.data)
-+		block->page.zip.data += frame_offset;
-+
-+	block->is_hashed = FALSE;
-+
-+	mutex_create(&block->mutex, SYNC_BUF_BLOCK);
-+
-+	rw_lock_create(&block->lock, SYNC_LEVEL_VARYING);
-+	ut_ad(rw_lock_validate(&(block->lock)));
-+
-+#ifdef UNIV_SYNC_DEBUG
-+	rw_lock_create(&block->debug_latch, SYNC_NO_ORDER_CHECK);
-+#endif /* UNIV_SYNC_DEBUG */
-+}
-+
- /********************************************************************//**
- Allocates a chunk of buffer frames.
- @return	chunk, or NULL on failure */
-@@ -768,26 +835,190 @@
- {
+@@ -769,10 +769,12 @@
  	buf_block_t*	block;
  	byte*		frame;
-+	ulint		zip_hash_n = 0;
-+	ulint		zip_hash_mem_size = 0;
-+	hash_table_t*	zip_hash_tmp = NULL;
  	ulint		i;
 +	ulint		size_target;
-+	buf_shm_info_t*	shm_info = NULL;
  
  	/* Round down to a multiple of page size,
  	although it already should be. */
  	mem_size = ut_2pow_round(mem_size, UNIV_PAGE_SIZE);
 +	size_target = (mem_size / UNIV_PAGE_SIZE) - 1;
-+
-+	srv_buffer_pool_shm_is_reused = FALSE;
-+
-+	if (srv_buffer_pool_shm_key) {
-+		/* zip_hash size */
-+		zip_hash_n = (mem_size / UNIV_PAGE_SIZE) * 2;
-+		zip_hash_mem_size = ut_2pow_round(hash_create_needed(zip_hash_n)
-+						  + (UNIV_PAGE_SIZE - 1), UNIV_PAGE_SIZE);
-+	}
-+
  	/* Reserve space for the block descriptors. */
  	mem_size += ut_2pow_round((mem_size / UNIV_PAGE_SIZE) * (sizeof *block)
  				  + (UNIV_PAGE_SIZE - 1), UNIV_PAGE_SIZE);
-+	if (srv_buffer_pool_shm_key) {
-+		 mem_size += ut_2pow_round(sizeof(buf_shm_info_t)
-+					   + (UNIV_PAGE_SIZE - 1), UNIV_PAGE_SIZE);
-+		 mem_size += zip_hash_mem_size;
-+	}
- 
- 	chunk->mem_size = mem_size;
-+
-+	if (srv_buffer_pool_shm_key) {
-+		ulint	binary_id;
-+		ibool	is_new;
-+
-+		ut_a(buf_pool->n_chunks == 1);
-+
-+		fprintf(stderr,
-+		"InnoDB: Warning: The innodb_buffer_pool_shm_key option has been specified.\n"
-+		"InnoDB: Do not change the following between restarts of the server while this option is being used:\n"
-+		"InnoDB:   * the mysqld executable between restarts of the server.\n"
-+		"InnoDB:   * the value of innodb_buffer_pool_size.\n"
-+		"InnoDB:   * the value of innodb_page_size.\n"
-+		"InnoDB:   * datafiles created by InnoDB during this session.\n"
-+		"InnoDB: Otherwise, data corruption in datafiles may result.\n");
-+
-+		/* FIXME: This is vague id still */
-+		binary_id = (ulint) ((byte*)mtr_commit - (byte*)btr_root_get)
-+			  + (ulint) ((byte*)os_get_os_version - (byte*)buf_calc_page_new_checksum)
-+			  + (ulint) ((byte*)page_dir_find_owner_slot - (byte*)dfield_data_is_binary_equal)
-+			  + (ulint) ((byte*)que_graph_publish - (byte*)dict_casedn_str)
-+			  + (ulint) ((byte*)read_view_oldest_copy_or_open_new - (byte*)fil_space_get_version)
-+			  + (ulint) ((byte*)rec_get_n_extern_new - (byte*)fsp_get_size_low)
-+			  + (ulint) ((byte*)row_get_trx_id_offset - (byte*)ha_create_func)
-+			  + (ulint) ((byte*)srv_set_io_thread_op_info - (byte*)thd_is_replication_slave_thread)
-+			  + (ulint) ((byte*)mutex_create_func - (byte*)ibuf_inside)
-+			  + (ulint) ((byte*)trx_set_detailed_error - (byte*)lock_check_trx_id_sanity)
-+			  + (ulint) ((byte*)ut_time - (byte*)mem_heap_strdup);
-+
-+		chunk->mem = os_shm_alloc(&chunk->mem_size, srv_buffer_pool_shm_key, &is_new);
-+
-+		if (UNIV_UNLIKELY(chunk->mem == NULL)) {
-+			return(NULL);
-+		}
-+init_again:
-+#ifdef UNIV_SET_MEM_TO_ZERO
-+		if (is_new) {
-+			memset(chunk->mem, '\0', chunk->mem_size);
-+		}
-+#endif
-+		/* for ut_fold_binary_32(), these values should be 32-bit aligned */
-+		ut_a(sizeof(buf_shm_info_t) % 4 == 0);
-+		ut_a((ulint)chunk->mem % 4 == 0);
-+		ut_a(chunk->mem_size % 4 == 0);
-+
-+		shm_info = chunk->mem;
-+
-+		zip_hash_tmp = (hash_table_t*)((byte*)chunk->mem + chunk->mem_size - zip_hash_mem_size);
-+
-+		if (is_new) {
-+			strncpy(shm_info->head_str, BUF_SHM_INFO_HEAD, 8);
-+			shm_info->binary_id = binary_id;
-+			shm_info->is_new = TRUE;	/* changed to FALSE when the initialization is finished */
-+			shm_info->clean = FALSE;	/* changed to TRUE when free the segment. */
-+			shm_info->reusable = FALSE;	/* changed to TRUE when validation is finished. */
-+			shm_info->buf_pool_size = srv_buf_pool_size;
-+			shm_info->page_size = srv_page_size;
-+			shm_info->zip_hash_offset = chunk->mem_size - zip_hash_mem_size;
-+			shm_info->zip_hash_n = zip_hash_n;
-+		} else {
-+			ulint	checksum;
-+
-+			if (strncmp(shm_info->head_str, BUF_SHM_INFO_HEAD, 8)) {
-+				fprintf(stderr,
-+				"InnoDB: Error: The shared memory segment seems not to be for buffer pool.\n");
-+				return(NULL);
-+			}
-+			if (shm_info->binary_id != binary_id) {
-+				fprintf(stderr,
-+				"InnoDB: Error: The shared memory segment seems not to be for this binary.\n");
-+				return(NULL);
-+			}
-+			if (shm_info->is_new) {
-+				fprintf(stderr,
-+				"InnoDB: Error: The shared memory was not initialized yet.\n");
-+				return(NULL);
-+			}
-+			if (shm_info->buf_pool_size != srv_buf_pool_size) {
-+				fprintf(stderr,
-+				"InnoDB: Error: srv_buf_pool_size is different (shm=%lu current=%lu).\n",
-+				shm_info->buf_pool_size, srv_buf_pool_size);
-+				return(NULL);
-+			}
-+			if (shm_info->page_size != srv_page_size) {
-+				fprintf(stderr,
-+				"InnoDB: Error: srv_page_size is different (shm=%lu current=%lu).\n",
-+				shm_info->page_size, srv_page_size);
-+				return(NULL);
-+			}
-+			if (!shm_info->reusable) {
-+				fprintf(stderr,
-+				"InnoDB: Warning: The shared memory has unrecoverable contents.\n"
-+				"InnoDB: The shared memory segment is initialized.\n");
-+				is_new = TRUE;
-+				goto init_again;
-+			}
-+			if (!shm_info->clean) {
-+				fprintf(stderr,
-+				"InnoDB: Warning: The shared memory was not shut down cleanly.\n"
-+				"InnoDB: The shared memory segment is initialized.\n");
-+				is_new = TRUE;
-+				goto init_again;
-+			}
-+
-+			ut_a(shm_info->zip_hash_offset == chunk->mem_size - zip_hash_mem_size);
-+			ut_a(shm_info->zip_hash_n == zip_hash_n);
-+
-+			/* check checksum */
-+			if (srv_buffer_pool_shm_checksum) {
-+				checksum = ut_fold_binary_32((byte*)chunk->mem + sizeof(buf_shm_info_t),
-+							     chunk->mem_size - sizeof(buf_shm_info_t));
-+			} else {
-+				checksum = BUF_NO_CHECKSUM_MAGIC;
-+			}
-+
-+			if (shm_info->checksum != BUF_NO_CHECKSUM_MAGIC
-+			    && shm_info->checksum != checksum) {
-+				fprintf(stderr,
-+				"InnoDB: Error: checksum of the shared memory is not match. "
-+				"(stored=%lu calculated=%lu)\n",
-+				shm_info->checksum, checksum);
-+				return(NULL);
-+			}
-+
-+			/* flag to use the segment. */
-+			shm_info->clean = FALSE;	/* changed to TRUE when free the segment. */
-+		}
-+
-+		/* init zip_hash contents */
-+		if (is_new) {
-+			hash_create_init(zip_hash_tmp, zip_hash_n);
-+		} else {
-+			/* adjust offset is done later */
-+			hash_create_reuse(zip_hash_tmp);
-+
-+			srv_buffer_pool_shm_is_reused = TRUE;
-+		}
-+	} else {
- 	chunk->mem = os_mem_alloc_large(&chunk->mem_size);
- 
- 	if (UNIV_UNLIKELY(chunk->mem == NULL)) {
- 
- 		return(NULL);
- 	}
-+	}
- 
- 	/* Allocate the block descriptors from
- 	the start of the memory block. */
-+	if (srv_buffer_pool_shm_key) {
-+		chunk->blocks = (buf_block_t*)((byte*)chunk->mem + sizeof(buf_shm_info_t));
-+	} else {
- 	chunk->blocks = chunk->mem;
-+	}
- 
- 	/* Align a pointer to the first frame.  Note that when
- 	os_large_page_size is smaller than UNIV_PAGE_SIZE,
-@@ -795,8 +1026,13 @@
- 	it is bigger, we may allocate more blocks than requested. */
- 
- 	frame = ut_align(chunk->mem, UNIV_PAGE_SIZE);
-+	if (srv_buffer_pool_shm_key) {
-+		/* reserve zip_hash space and always -1 for reproductibity */
-+		chunk->size = (chunk->mem_size - zip_hash_mem_size) / UNIV_PAGE_SIZE - 1;
-+	} else {
- 	chunk->size = chunk->mem_size / UNIV_PAGE_SIZE
- 		- (frame != chunk->mem);
-+	}
- 
- 	/* Subtract the space needed for block descriptors. */
- 	{
-@@ -810,6 +1046,102 @@
+@@ -810,6 +812,10 @@
  		chunk->size = size;
  	}
  
@@ -309,404 +29,52 @@
 +		chunk->size = size_target;
 +	}
 +
-+	if (shm_info && !(shm_info->is_new)) {
-+		/* convert the shared memory segment for reuse */
-+		ptrdiff_t	phys_offset;
-+		ptrdiff_t	logi_offset;
-+		ptrdiff_t	blocks_offset;
-+		void*		previous_frame_address;
-+
-+		if (chunk->size < shm_info->chunk_backup.size) {
-+			fprintf(stderr,
-+			"InnoDB: Error: The buffer pool became smaller because of allocated address.\n"
-+			"InnoDB: Retrying may avoid this situation.\n");
-+			shm_info->clean = TRUE; /* release the flag for retrying */
-+			return(NULL);
-+		}
-+
-+		chunk->size = shm_info->chunk_backup.size;
-+		phys_offset = frame - ((byte*)chunk->mem + shm_info->frame_offset);
-+		logi_offset = frame - chunk->blocks[0].frame;
-+		previous_frame_address = chunk->blocks[0].frame;
-+		blocks_offset = (byte*)chunk->blocks - (byte*)shm_info->chunk_backup.blocks;
-+
-+		if (phys_offset || logi_offset || blocks_offset) {
-+			fprintf(stderr,
-+			"InnoDB: Buffer pool in the shared memory segment should be converted.\n"
-+			"InnoDB: Previous frames in address      : %p\n"
-+			"InnoDB: Previous frames were located    : %p\n"
-+			"InnoDB: Current frames should be located: %p\n"
-+			"InnoDB: Pysical offset                  : %ld (%#lx)\n"
-+			"InnoDB: Logical offset (frames)         : %ld (%#lx)\n"
-+			"InnoDB: Logical offset (blocks)         : %ld (%#lx)\n",
-+				(byte*)chunk->mem + shm_info->frame_offset,
-+				chunk->blocks[0].frame, frame,
-+				phys_offset, phys_offset, logi_offset, logi_offset,
-+				blocks_offset, blocks_offset);
-+		} else {
-+			fprintf(stderr,
-+			"InnoDB: Buffer pool in the shared memory segment can be used as it is.\n");
-+		}
-+
-+		if (phys_offset) {
-+			fprintf(stderr,
-+			"InnoDB: Aligning physical offset...");
-+
-+			memmove(frame, (byte*)chunk->mem + shm_info->frame_offset,
-+				chunk->size * UNIV_PAGE_SIZE);
-+
-+			fprintf(stderr,
-+			" Done.\n");
-+		}
-+
-+		/* buf_block_t */
-+		block = chunk->blocks;
-+		for (i = chunk->size; i--; ) {
-+			buf_block_reuse(block, logi_offset);
-+			block++;
-+		}
-+
-+		if (logi_offset || blocks_offset) {
-+			fprintf(stderr,
-+			"InnoDB: Aligning logical offset...");
-+
-+
-+			/* buf_pool_t buf_pool_backup */
-+			UT_LIST_OFFSET(flush_list, buf_page_t, shm_info->buf_pool_backup.flush_list,
-+					previous_frame_address, logi_offset, blocks_offset);
-+			UT_LIST_OFFSET(free, buf_page_t, shm_info->buf_pool_backup.free,
-+					previous_frame_address, logi_offset, blocks_offset);
-+			UT_LIST_OFFSET(LRU, buf_page_t, shm_info->buf_pool_backup.LRU,
-+					previous_frame_address, logi_offset, blocks_offset);
-+			if (shm_info->buf_pool_backup.LRU_old)
-+				shm_info->buf_pool_backup.LRU_old =
-+					(buf_page_t*)((byte*)(shm_info->buf_pool_backup.LRU_old)
-+						+ (((void*)shm_info->buf_pool_backup.LRU_old > previous_frame_address)
-+						  ? logi_offset : blocks_offset));
-+
-+			UT_LIST_OFFSET(unzip_LRU, buf_block_t, shm_info->buf_pool_backup.unzip_LRU,
-+					previous_frame_address, logi_offset, blocks_offset);
-+
-+			UT_LIST_OFFSET(zip_list, buf_page_t, shm_info->buf_pool_backup.zip_clean,
-+					previous_frame_address, logi_offset, blocks_offset);
-+			for (i = 0; i < BUF_BUDDY_SIZES_MAX; i++) {
-+				UT_LIST_OFFSET(zip_list, buf_page_t, shm_info->buf_pool_backup.zip_free[i],
-+					previous_frame_address, logi_offset, blocks_offset);
-+			}
-+
-+			HASH_OFFSET(zip_hash_tmp, buf_page_t, hash,
-+					previous_frame_address, logi_offset, blocks_offset);
-+
-+			fprintf(stderr,
-+			" Done.\n");
-+		}
-+	} else {
  	/* Init block structs and assign frames for them. Then we
  	assign the frames to the first blocks (we already mapped the
  	memory above). */
-@@ -833,6 +1165,11 @@
- 		block++;
- 		frame += UNIV_PAGE_SIZE;
- 	}
-+	}
-+
-+	if (shm_info) {
-+		shm_info->frame_offset = chunk->blocks[0].frame - (byte*)chunk->mem;
-+	}
- 
- 	return(chunk);
- }
-@@ -1014,6 +1351,8 @@
- 		UNIV_MEM_UNDESC(block);
- 	}
- 
-+	ut_a(!srv_buffer_pool_shm_key);
-+
- 	os_mem_free_large(chunk->mem, chunk->mem_size);
- }
- 
-@@ -1063,7 +1402,10 @@
- 	srv_buf_pool_curr_size = buf_pool->curr_size * UNIV_PAGE_SIZE;
- 
- 	buf_pool->page_hash = hash_create(2 * buf_pool->curr_size);
-+	/* zip_hash is allocated to shm when srv_buffer_pool_shm_key is enabled */
-+	if (!srv_buffer_pool_shm_key) {
- 	buf_pool->zip_hash = hash_create(2 * buf_pool->curr_size);
-+	}
- 
- 	buf_pool->last_printout_time = time(NULL);
- 
-@@ -1078,6 +1420,86 @@
- 	--------------------------- */
- 	/* All fields are initialized by mem_zalloc(). */
- 
-+	if (srv_buffer_pool_shm_key) {
-+		buf_shm_info_t*	shm_info;
-+
-+		ut_a((byte*)chunk->blocks == (byte*)chunk->mem + sizeof(buf_shm_info_t));
-+		shm_info = chunk->mem;
-+
-+		buf_pool->zip_hash = (hash_table_t*)((byte*)chunk->mem + shm_info->zip_hash_offset);
-+
-+		if(shm_info->is_new) {
-+			shm_info->is_new = FALSE; /* initialization was finished */
-+		} else {
-+			buf_block_t*	block = chunk->blocks;
-+			buf_page_t*	b;
-+
-+			/* shm_info->buf_pool_backup should be converted */
-+			/* at buf_chunk_init(). So copy simply. */
-+			buf_pool->flush_list 		= shm_info->buf_pool_backup.flush_list;
-+			buf_pool->freed_page_clock 	= shm_info->buf_pool_backup.freed_page_clock;
-+			buf_pool->free			= shm_info->buf_pool_backup.free;
-+			buf_pool->LRU			= shm_info->buf_pool_backup.LRU;
-+			buf_pool->LRU_old		= shm_info->buf_pool_backup.LRU_old;
-+			buf_pool->LRU_old_len		= shm_info->buf_pool_backup.LRU_old_len;
-+			buf_pool->unzip_LRU		= shm_info->buf_pool_backup.unzip_LRU;
-+			buf_pool->zip_clean		= shm_info->buf_pool_backup.zip_clean;
-+			for (i = 0; i < BUF_BUDDY_SIZES_MAX; i++) {
-+				buf_pool->zip_free[i]	= shm_info->buf_pool_backup.zip_free[i];
-+			}
-+
-+			for (i = 0; i < chunk->size; i++, block++) {
-+				if (buf_block_get_state(block)
-+				    == BUF_BLOCK_FILE_PAGE) {
-+					ut_d(block->page.in_page_hash = TRUE);
-+					HASH_INSERT(buf_page_t, hash, buf_pool->page_hash,
-+						    buf_page_address_fold(
-+							    block->page.space,
-+							    block->page.offset),
-+						    &block->page);
-+				}
-+			}
-+
-+			for (b = UT_LIST_GET_FIRST(buf_pool->zip_clean); b;
-+			     b = UT_LIST_GET_NEXT(zip_list, b)) {
-+				ut_ad(!b->in_flush_list);
-+				ut_ad(b->in_LRU_list);
-+
-+				ut_d(b->in_page_hash = TRUE);
-+				HASH_INSERT(buf_page_t, hash, buf_pool->page_hash,
-+					    buf_page_address_fold(b->space, b->offset), b);
-+			}
-+
-+			for (b = UT_LIST_GET_FIRST(buf_pool->flush_list); b;
-+			     b = UT_LIST_GET_NEXT(flush_list, b)) {
-+				ut_ad(b->in_flush_list);
-+				ut_ad(b->in_LRU_list);
-+
-+				switch (buf_page_get_state(b)) {
-+				case BUF_BLOCK_ZIP_DIRTY:
-+					ut_d(b->in_page_hash = TRUE);
-+					HASH_INSERT(buf_page_t, hash, buf_pool->page_hash,
-+						    buf_page_address_fold(b->space,
-+							    		  b->offset), b);
-+					break;
-+				case BUF_BLOCK_FILE_PAGE:
-+					/* uncompressed page */
-+					break;
-+				case BUF_BLOCK_ZIP_FREE:
-+				case BUF_BLOCK_ZIP_PAGE:
-+				case BUF_BLOCK_NOT_USED:
-+				case BUF_BLOCK_READY_FOR_USE:
-+				case BUF_BLOCK_MEMORY:
-+				case BUF_BLOCK_REMOVE_HASH:
-+					ut_error;
-+					break;
-+				}
-+			}
-+
-+
-+		}
-+	}
-+
- 	mutex_exit(&LRU_list_mutex);
- 	rw_lock_x_unlock(&page_hash_latch);
- 	buf_pool_mutex_exit();
-@@ -1102,6 +1524,34 @@
- 	buf_chunk_t*	chunk;
- 	buf_chunk_t*	chunks;
- 
-+	if (srv_buffer_pool_shm_key) {
-+		buf_shm_info_t*	shm_info;
-+
-+		ut_a(buf_pool->n_chunks == 1);
-+
-+		chunk = buf_pool->chunks;
-+		shm_info = chunk->mem;
-+		ut_a((byte*)chunk->blocks == (byte*)chunk->mem + sizeof(buf_shm_info_t));
-+
-+		/* validation the shared memory segment doesn't have unrecoverable contents. */
-+		/* Currently, validation became not needed */
-+		shm_info->reusable = TRUE;
-+
-+		memcpy(&(shm_info->buf_pool_backup), buf_pool, sizeof(buf_pool_t));
-+		memcpy(&(shm_info->chunk_backup), chunk, sizeof(buf_chunk_t));
-+
-+		if (srv_fast_shutdown < 2) {
-+			if (srv_buffer_pool_shm_checksum) {
-+				shm_info->checksum = ut_fold_binary_32((byte*)chunk->mem + sizeof(buf_shm_info_t),
-+								       chunk->mem_size - sizeof(buf_shm_info_t));
-+			} else {
-+				shm_info->checksum = BUF_NO_CHECKSUM_MAGIC;
-+			}
-+			shm_info->clean = TRUE;
-+		}
-+
-+		os_shm_free(chunk->mem, chunk->mem_size);
-+	} else {
- 	chunks = buf_pool->chunks;
- 	chunk = chunks + buf_pool->n_chunks;
- 
-@@ -1110,10 +1560,13 @@
- 		would fail at shutdown. */
- 		os_mem_free_large(chunk->mem, chunk->mem_size);
- 	}
-+	}
- 
- 	mem_free(buf_pool->chunks);
- 	hash_table_free(buf_pool->page_hash);
-+	if (!srv_buffer_pool_shm_key) {
- 	hash_table_free(buf_pool->zip_hash);
-+	}
- 	mem_free(buf_pool);
- 	buf_pool = NULL;
- }
-@@ -1308,6 +1761,11 @@
- 	//buf_pool_mutex_enter();
- 	mutex_enter(&LRU_list_mutex);
- 
-+	if (srv_buffer_pool_shm_key) {
-+		/* Cannot support shrink */
-+		goto func_done;
-+	}
-+
- shrink_again:
- 	if (buf_pool->n_chunks <= 1) {
- 
-@@ -1551,6 +2009,11 @@
- buf_pool_resize(void)
- /*=================*/
- {
-+	if (srv_buffer_pool_shm_key) {
-+		/* Cannot support resize */
-+		return;
-+	}
-+
- 	//buf_pool_mutex_enter();
- 	mutex_enter(&LRU_list_mutex);
- 
-diff -ruN a/storage/innodb_plugin/ha/hash0hash.c b/storage/innodb_plugin/ha/hash0hash.c
---- a/storage/innodb_plugin/ha/hash0hash.c	2010-06-04 00:49:59.000000000 +0900
-+++ b/storage/innodb_plugin/ha/hash0hash.c	2010-07-14 16:40:16.150438366 +0900
-@@ -128,6 +128,70 @@
- }
- 
- /*************************************************************//**
-+*/
-+UNIV_INTERN
-+ulint
-+hash_create_needed(
-+/*===============*/
-+	ulint	n)
-+{
-+	ulint	prime;
-+	ulint	offset;
-+
-+	prime = ut_find_prime(n);
-+
-+	offset = (sizeof(hash_table_t) + 7) / 8;
-+	offset *= 8;
-+
-+	return(offset + sizeof(hash_cell_t) * prime);
-+}
-+
-+UNIV_INTERN
-+void
-+hash_create_init(
-+/*=============*/
-+	hash_table_t*	table,
-+	ulint		n)
-+{
-+	ulint	prime;
-+	ulint	offset;
-+
-+	prime = ut_find_prime(n);
-+
-+	offset = (sizeof(hash_table_t) + 7) / 8;
-+	offset *= 8;
-+
-+	table->array = (hash_cell_t*)(((byte*)table) + offset);
-+	table->n_cells = prime;
-+# if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
-+	table->adaptive = FALSE;
-+# endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */
-+	table->n_mutexes = 0;
-+	table->mutexes = NULL;
-+	table->heaps = NULL;
-+	table->heap = NULL;
-+	ut_d(table->magic_n = HASH_TABLE_MAGIC_N);
-+
-+	/* Initialize the cell array */
-+	hash_table_clear(table);
-+}
-+
-+UNIV_INTERN
-+void
-+hash_create_reuse(
-+/*==============*/
-+	hash_table_t*	table)
-+{
-+	ulint	offset;
-+
-+	offset = (sizeof(hash_table_t) + 7) / 8;
-+	offset *= 8;
-+
-+	table->array = (hash_cell_t*)(((byte*)table) + offset);
-+	ut_ad(table->magic_n == HASH_TABLE_MAGIC_N);
-+}
-+
-+/*************************************************************//**
- Frees a hash table. */
- UNIV_INTERN
- void
 diff -ruN a/storage/innodb_plugin/handler/ha_innodb.cc b/storage/innodb_plugin/handler/ha_innodb.cc
 --- a/storage/innodb_plugin/handler/ha_innodb.cc	2010-07-14 16:34:18.597725479 +0900
 +++ b/storage/innodb_plugin/handler/ha_innodb.cc	2010-07-14 16:40:16.159323612 +0900
-@@ -198,6 +198,7 @@
+@@ -198,6 +198,8 @@
  static my_bool	innobase_create_status_file		= FALSE;
  static my_bool	innobase_stats_on_metadata		= TRUE;
  static my_bool	innobase_use_sys_stats_table		= FALSE;
 +static my_bool	innobase_buffer_pool_shm_checksum	= TRUE;
++static uint	innobase_buffer_pool_shm_key		= 0;
  
  static char*	internal_innobase_data_file_path	= NULL;
  
-@@ -2476,6 +2477,7 @@
- 	srv_use_doublewrite_buf = (ibool) innobase_use_doublewrite;
- 	srv_use_checksums = (ibool) innobase_use_checksums;
- 	srv_fast_checksum = (ibool) innobase_fast_checksum;
-+	srv_buffer_pool_shm_checksum = (ibool) innobase_buffer_pool_shm_checksum;
- 
- #ifdef HAVE_LARGE_PAGES
-         if ((os_use_large_pages = (ibool) my_use_large_pages))
-@@ -11476,6 +11478,16 @@
+@@ -2460,6 +2462,12 @@
+ 
+ 	srv_buf_pool_size = (ulint) innobase_buffer_pool_size;
+ 
++	if (innobase_buffer_pool_shm_key) {
++		fprintf(stderr,
++			"InnoDB: Warning: innodb_buffer_pool_shm_key is deprecated function.\n"
++			"InnoDB:          innodb_buffer_pool_shm_key was ignored.\n");
++	}
++
+ 	srv_mem_pool_size = (ulint) innobase_additional_mem_pool_size;
+ 
+ 	srv_n_file_io_threads = (ulint) innobase_file_io_threads;
+@@ -11476,6 +11484,16 @@
    "The size of the memory buffer InnoDB uses to cache data and indexes of its tables.",
    NULL, NULL, 128*1024*1024L, 32*1024*1024L, LONGLONG_MAX, 1024*1024L);
  
-+static MYSQL_SYSVAR_UINT(buffer_pool_shm_key, srv_buffer_pool_shm_key,
++static MYSQL_SYSVAR_UINT(buffer_pool_shm_key, innobase_buffer_pool_shm_key,
 +  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
-+  "[experimental] The key value of shared memory segment for the buffer pool. 0 (default) disables the feature.",
++  "[Deprecated option] no effect",
 +  NULL, NULL, 0, 0, INT_MAX32, 0);
 +
 +static MYSQL_SYSVAR_BOOL(buffer_pool_shm_checksum, innobase_buffer_pool_shm_checksum,
 +  PLUGIN_VAR_NOCMDARG | PLUGIN_VAR_READONLY,
-+  "Enable buffer_pool_shm checksum validation (enabled by default).",
++  "[Deprecated option] no effect",
 +  NULL, NULL, TRUE);
 +
  static MYSQL_SYSVAR_ULONG(commit_concurrency, innobase_commit_concurrency,
    PLUGIN_VAR_RQCMDARG,
    "Helps in performance tuning in heavily concurrent environments.",
-@@ -11764,6 +11776,8 @@
+@@ -11764,6 +11782,8 @@
    MYSQL_SYSVAR(additional_mem_pool_size),
    MYSQL_SYSVAR(autoextend_increment),
    MYSQL_SYSVAR(buffer_pool_size),
@@ -715,428 +83,3 @@
    MYSQL_SYSVAR(checksums),
    MYSQL_SYSVAR(fast_checksum),
    MYSQL_SYSVAR(commit_concurrency),
-diff -ruN a/storage/innodb_plugin/handler/innodb_patch_info.h b/storage/innodb_plugin/handler/innodb_patch_info.h
---- a/storage/innodb_plugin/handler/innodb_patch_info.h	2010-07-14 16:34:18.603733950 +0900
-+++ b/storage/innodb_plugin/handler/innodb_patch_info.h	2010-07-14 16:40:16.164323927 +0900
-@@ -47,5 +47,6 @@
- {"innodb_fast_checksum","Using the checksum on 32bit-unit calculation","incompatible for unpatched ver.","http://www.percona.com/docs/wiki/percona-xtradb"},
- {"innodb_files_extend","allow >4GB transaction log files, and can vary universal page size of datafiles","incompatible for unpatched ver.","http://www.percona.com/docs/wiki/percona-xtradb"},
- {"innodb_sys_tables_sys_indexes","Expose InnoDB SYS_TABLES and SYS_INDEXES schema tables","","http://www.percona.com/docs/wiki/percona-xtradb"},
-+{"innodb_buffer_pool_shm","Put buffer pool contents to shared memory segment and reuse it at clean restart [experimental]","","http://www.percona.com/docs/wiki/percona-xtradb"},
- {NULL, NULL, NULL, NULL}
- };
-diff -ruN a/storage/innodb_plugin/include/buf0buf.h b/storage/innodb_plugin/include/buf0buf.h
---- a/storage/innodb_plugin/include/buf0buf.h	2010-07-14 16:33:23.823323393 +0900
-+++ b/storage/innodb_plugin/include/buf0buf.h	2010-07-14 16:40:16.166323436 +0900
-@@ -36,6 +36,7 @@
- #include "ut0rbt.h"
- #ifndef UNIV_HOTBACKUP
- #include "os0proc.h"
-+#include "srv0srv.h"
- 
- /** @name Modes for buf_page_get_gen */
- /* @{ */
-@@ -1302,7 +1303,10 @@
- /**********************************************************************//**
- Compute the hash fold value for blocks in buf_pool->zip_hash. */
- /* @{ */
--#define BUF_POOL_ZIP_FOLD_PTR(ptr) ((ulint) (ptr) / UNIV_PAGE_SIZE)
-+/* the fold should be relative when srv_buffer_pool_shm_key is enabled */
-+#define BUF_POOL_ZIP_FOLD_PTR(ptr) (!srv_buffer_pool_shm_key\
-+					?((ulint) (ptr) / UNIV_PAGE_SIZE)\
-+					:((ulint) ((byte*)ptr - (byte*)(buf_pool->chunks->blocks->frame)) / UNIV_PAGE_SIZE))
- #define BUF_POOL_ZIP_FOLD(b) BUF_POOL_ZIP_FOLD_PTR((b)->frame)
- #define BUF_POOL_ZIP_FOLD_BPAGE(b) BUF_POOL_ZIP_FOLD((buf_block_t*) (b))
- /* @} */
-diff -ruN a/storage/innodb_plugin/include/hash0hash.h b/storage/innodb_plugin/include/hash0hash.h
---- a/storage/innodb_plugin/include/hash0hash.h	2010-06-04 00:49:59.000000000 +0900
-+++ b/storage/innodb_plugin/include/hash0hash.h	2010-07-14 16:40:16.168323262 +0900
-@@ -49,6 +49,28 @@
- hash_create(
- /*========*/
- 	ulint	n);	/*!< in: number of array cells */
-+
-+/*************************************************************//**
-+*/
-+UNIV_INTERN
-+ulint
-+hash_create_needed(
-+/*===============*/
-+	ulint	n);
-+
-+UNIV_INTERN
-+void
-+hash_create_init(
-+/*=============*/
-+	hash_table_t*	table,
-+	ulint		n);
-+
-+UNIV_INTERN
-+void
-+hash_create_reuse(
-+/*==============*/
-+	hash_table_t*	table);
-+
- #ifndef UNIV_HOTBACKUP
- /*************************************************************//**
- Creates a mutex array to protect a hash table. */
-@@ -327,6 +349,33 @@
- 		}\
- 	}\
- } while (0)
-+
-+/********************************************************************//**
-+Align nodes with moving location.*/
-+#define HASH_OFFSET(TABLE, NODE_TYPE, PTR_NAME, FADDR, FOFFSET, BOFFSET) \
-+do {\
-+	ulint		i2222;\
-+	ulint		cell_count2222;\
-+\
-+	cell_count2222 = hash_get_n_cells(TABLE);\
-+\
-+	for (i2222 = 0; i2222 < cell_count2222; i2222++) {\
-+		NODE_TYPE*	node2222;\
-+\
-+		if ((TABLE)->array[i2222].node) \
-+			(TABLE)->array[i2222].node = (void*)((byte*)(TABLE)->array[i2222].node \
-+			+ (((TABLE)->array[i2222].node > (void*)FADDR)?FOFFSET:BOFFSET));\
-+		node2222 = HASH_GET_FIRST((TABLE), i2222);\
-+\
-+		while (node2222) {\
-+			if (node2222->PTR_NAME) \
-+				node2222->PTR_NAME = (void*)((byte*)(node2222->PTR_NAME) \
-+				+ ((((void*)node2222->PTR_NAME) > (void*)FADDR)?FOFFSET:BOFFSET));\
-+\
-+			node2222 = node2222->PTR_NAME;\
-+		}\
-+	}\
-+} while (0)
- 
- /************************************************************//**
- Gets the mutex index for a fold value in a hash table.
-diff -ruN a/storage/innodb_plugin/include/os0proc.h b/storage/innodb_plugin/include/os0proc.h
---- a/storage/innodb_plugin/include/os0proc.h	2010-06-04 00:49:59.000000000 +0900
-+++ b/storage/innodb_plugin/include/os0proc.h	2010-07-14 16:40:16.169321536 +0900
-@@ -32,6 +32,11 @@
- #ifdef UNIV_LINUX
- #include <sys/ipc.h>
- #include <sys/shm.h>
-+#else
-+# if defined HAVE_SYS_IPC_H && HAVE_SYS_SHM_H
-+#include <sys/ipc.h>
-+#include <sys/shm.h>
-+# endif
- #endif
- 
- typedef void*			os_process_t;
-@@ -70,6 +75,29 @@
- 	ulint	size);			/*!< in: size returned by
- 					os_mem_alloc_large() */
- 
-+
-+/****************************************************************//**
-+Allocates or attaches and reuses shared memory segment.
-+The content is not cleared automatically.
-+@return	allocated memory */
-+UNIV_INTERN
-+void*
-+os_shm_alloc(
-+/*=========*/
-+	ulint*	n,			/*!< in/out: number of bytes */
-+	uint	key,
-+	ibool*	is_new);
-+
-+/****************************************************************//**
-+Detach shared memory segment. */
-+UNIV_INTERN
-+void
-+os_shm_free(
-+/*========*/
-+	void	*ptr,			/*!< in: pointer returned by
-+					os_shm_alloc() */
-+	ulint	size);			/*!< in: size returned by
-+					os_shm_alloc() */
- #ifndef UNIV_NONINL
- #include "os0proc.ic"
- #endif
-diff -ruN a/storage/innodb_plugin/include/srv0srv.h b/storage/innodb_plugin/include/srv0srv.h
---- a/storage/innodb_plugin/include/srv0srv.h	2010-07-14 16:32:49.695323045 +0900
-+++ b/storage/innodb_plugin/include/srv0srv.h	2010-07-14 16:40:16.171325784 +0900
-@@ -156,6 +156,10 @@
- extern ulint	srv_mem_pool_size;
- extern ulint	srv_lock_table_size;
- 
-+extern uint	srv_buffer_pool_shm_key;
-+extern ibool	srv_buffer_pool_shm_is_reused;
-+extern ibool	srv_buffer_pool_shm_checksum;
-+
- extern ibool	srv_thread_concurrency_timer_based;
- 
- extern ulint	srv_n_file_io_threads;
-diff -ruN a/storage/innodb_plugin/include/ut0lst.h b/storage/innodb_plugin/include/ut0lst.h
---- a/storage/innodb_plugin/include/ut0lst.h	2010-06-04 00:49:59.000000000 +0900
-+++ b/storage/innodb_plugin/include/ut0lst.h	2010-07-14 16:40:16.172321547 +0900
-@@ -257,5 +257,48 @@
- 	ut_a(ut_list_node_313 == NULL);					\
- } while (0)
- 
-+/********************************************************************//**
-+Align nodes with moving location.
-+@param NAME		the name of the list
-+@param TYPE		node type
-+@param BASE		base node (not a pointer to it)
-+@param OFFSET		offset moved */
-+#define UT_LIST_OFFSET(NAME, TYPE, BASE, FADDR, FOFFSET, BOFFSET)	\
-+do {									\
-+	ulint	ut_list_i_313;						\
-+	TYPE*	ut_list_node_313;					\
-+									\
-+	if ((BASE).start)						\
-+		(BASE).start = (void*)((byte*)((BASE).start)			\
-+			+ (((void*)((BASE).start) > (void*)FADDR)?FOFFSET:BOFFSET));\
-+	if ((BASE).end)							\
-+		(BASE).end   = (void*)((byte*)((BASE).end)			\
-+			+ (((void*)((BASE).end) > (void*)FADDR)?FOFFSET:BOFFSET));\
-+									\
-+	ut_list_node_313 = (BASE).start;				\
-+									\
-+	for (ut_list_i_313 = (BASE).count; ut_list_i_313--; ) {		\
-+		ut_a(ut_list_node_313);					\
-+		if ((ut_list_node_313->NAME).prev)			\
-+			(ut_list_node_313->NAME).prev = (void*)((byte*)((ut_list_node_313->NAME).prev)\
-+				+ (((void*)((ut_list_node_313->NAME).prev) > (void*)FADDR)?FOFFSET:BOFFSET));\
-+		if ((ut_list_node_313->NAME).next)			\
-+			(ut_list_node_313->NAME).next =	(void*)((byte*)((ut_list_node_313->NAME).next)\
-+				+ (((void*)((ut_list_node_313->NAME).next)> (void*)FADDR)?FOFFSET:BOFFSET));\
-+		ut_list_node_313 = (ut_list_node_313->NAME).next;	\
-+	}								\
-+									\
-+	ut_a(ut_list_node_313 == NULL);					\
-+									\
-+	ut_list_node_313 = (BASE).end;					\
-+									\
-+	for (ut_list_i_313 = (BASE).count; ut_list_i_313--; ) {		\
-+		ut_a(ut_list_node_313);					\
-+		ut_list_node_313 = (ut_list_node_313->NAME).prev;	\
-+	}								\
-+									\
-+	ut_a(ut_list_node_313 == NULL);					\
-+} while (0)
-+
- #endif
- 
-diff -ruN a/storage/innodb_plugin/log/log0recv.c b/storage/innodb_plugin/log/log0recv.c
---- a/storage/innodb_plugin/log/log0recv.c	2010-10-01 15:25:27.106299166 +0900
-+++ b/storage/innodb_plugin/log/log0recv.c	2010-10-01 15:26:33.689261436 +0900
-@@ -2899,6 +2899,7 @@
- /*==========================*/
- {
- 	ut_a(!recv_needed_recovery);
-+	ut_a(!srv_buffer_pool_shm_is_reused);
- 
- 	recv_needed_recovery = TRUE;
- 
-diff -ruN a/storage/innodb_plugin/os/os0proc.c b/storage/innodb_plugin/os/os0proc.c
---- a/storage/innodb_plugin/os/os0proc.c	2010-06-04 00:49:59.000000000 +0900
-+++ b/storage/innodb_plugin/os/os0proc.c	2010-07-14 16:40:16.174322953 +0900
-@@ -229,3 +229,173 @@
- 	}
- #endif
- }
-+
-+/****************************************************************//**
-+Allocates or attaches and reuses shared memory segment.
-+The content is not cleared automatically.
-+@return	allocated memory */
-+UNIV_INTERN
-+void*
-+os_shm_alloc(
-+/*=========*/
-+	ulint*	n,			/*!< in/out: number of bytes */
-+	uint	key,
-+	ibool*	is_new)
-+{
-+	void*	ptr;
-+#if defined HAVE_SYS_IPC_H && HAVE_SYS_SHM_H
-+	ulint	size;
-+	int	shmid;
-+
-+	*is_new = FALSE;
-+	fprintf(stderr,
-+		"InnoDB: The shared memory segment containing the buffer pool is: key  %#x (%d).\n",
-+		key, key);
-+# if defined HAVE_LARGE_PAGES && defined UNIV_LINUX
-+	if (!os_use_large_pages || !os_large_page_size) {
-+		goto skip;
-+	}
-+
-+	/* Align block size to os_large_page_size */
-+	ut_ad(ut_is_2pow(os_large_page_size));
-+	size = ut_2pow_round(*n + (os_large_page_size - 1),
-+			     os_large_page_size);
-+
-+	shmid = shmget((key_t)key, (size_t)size,
-+			IPC_CREAT | IPC_EXCL | SHM_HUGETLB | SHM_R | SHM_W);
-+	if (shmid < 0) {
-+		if (errno == EEXIST) {
-+			fprintf(stderr,
-+				"InnoDB: HugeTLB: The shared memory segment exists.\n");
-+			shmid = shmget((key_t)key, (size_t)size,
-+					SHM_HUGETLB | SHM_R | SHM_W);
-+			if (shmid < 0) {
-+				fprintf(stderr,
-+					"InnoDB: HugeTLB: Warning: Failed to allocate %lu bytes. (reuse) errno %d\n",
-+					size, errno);
-+				goto skip;
-+			} else {
-+				fprintf(stderr,
-+					"InnoDB: HugeTLB: The existent shared memory segment is used.\n");
-+			}
-+		} else {
-+			fprintf(stderr,
-+				"InnoDB: HugeTLB: Warning: Failed to allocate %lu bytes. (new) errno %d\n",
-+				size, errno);
-+			goto skip;
-+		}
-+	} else {
-+		*is_new = TRUE;
-+		fprintf(stderr,
-+			"InnoDB: HugeTLB: A new shared memory segment has been created .\n");
-+	}
-+
-+	ptr = shmat(shmid, NULL, 0);
-+	if (ptr == (void *)-1) {
-+		fprintf(stderr,
-+			"InnoDB: HugeTLB: Warning: Failed to attach shared memory segment, errno %d\n",
-+			errno);
-+		ptr = NULL;
-+	}
-+
-+	if (ptr) {
-+		*n = size;
-+		os_fast_mutex_lock(&ut_list_mutex);
-+		ut_total_allocated_memory += size;
-+		os_fast_mutex_unlock(&ut_list_mutex);
-+		UNIV_MEM_ALLOC(ptr, size);
-+		return(ptr);
-+	}
-+skip:
-+	*is_new = FALSE;
-+# endif /* HAVE_LARGE_PAGES && defined UNIV_LINUX */
-+# ifdef HAVE_GETPAGESIZE
-+	size = getpagesize();
-+# else
-+	size = UNIV_PAGE_SIZE;
-+# endif
-+	/* Align block size to system page size */
-+	ut_ad(ut_is_2pow(size));
-+	size = *n = ut_2pow_round(*n + (size - 1), size);
-+
-+	shmid = shmget((key_t)key, (size_t)size,
-+			IPC_CREAT | IPC_EXCL | SHM_R | SHM_W);
-+	if (shmid < 0) {
-+		if (errno == EEXIST) {
-+			fprintf(stderr,
-+				"InnoDB: A shared memory segment containing the buffer pool seems to already exist.\n");
-+			shmid = shmget((key_t)key, (size_t)size,
-+					SHM_R | SHM_W);
-+			if (shmid < 0) {
-+				fprintf(stderr,
-+					"InnoDB: Warning: Failed to allocate %lu bytes. (reuse) errno %d\n",
-+					size, errno);
-+				ptr = NULL;
-+				goto end;
-+			} else {
-+				fprintf(stderr,
-+					"InnoDB: The existent shared memory segment is used.\n");
-+			}
-+		} else {
-+			fprintf(stderr,
-+				"InnoDB: Warning: Failed to allocate %lu bytes. (new) errno %d\n",
-+				size, errno);
-+			ptr = NULL;
-+			goto end;
-+		}
-+	} else {
-+		*is_new = TRUE;
-+		fprintf(stderr,
-+			"InnoDB: A new shared memory segment has been created.\n");
-+	}
-+
-+	ptr = shmat(shmid, NULL, 0);
-+	if (ptr == (void *)-1) {
-+		fprintf(stderr,
-+			"InnoDB: Warning: Failed to attach shared memory segment, errno %d\n",
-+			errno);
-+		ptr = NULL;
-+	}
-+
-+	if (ptr) {
-+		*n = size;
-+		os_fast_mutex_lock(&ut_list_mutex);
-+		ut_total_allocated_memory += size;
-+		os_fast_mutex_unlock(&ut_list_mutex);
-+		UNIV_MEM_ALLOC(ptr, size);
-+	}
-+end:
-+#else /* HAVE_SYS_IPC_H && HAVE_SYS_SHM_H */
-+	fprintf(stderr, "InnoDB: shared memory segment is not supported.\n");
-+	ptr = NULL;
-+#endif /* HAVE_SYS_IPC_H && HAVE_SYS_SHM_H */
-+	return(ptr);
-+}
-+
-+/****************************************************************//**
-+Detach shared memory segment. */
-+UNIV_INTERN
-+void
-+os_shm_free(
-+/*========*/
-+	void	*ptr,			/*!< in: pointer returned by
-+					os_shm_alloc() */
-+	ulint	size)			/*!< in: size returned by
-+					os_shm_alloc() */
-+{
-+	os_fast_mutex_lock(&ut_list_mutex);
-+	ut_a(ut_total_allocated_memory >= size);
-+	os_fast_mutex_unlock(&ut_list_mutex);
-+
-+#if defined HAVE_SYS_IPC_H && HAVE_SYS_SHM_H
-+	if (!shmdt(ptr)) {
-+		os_fast_mutex_lock(&ut_list_mutex);
-+		ut_a(ut_total_allocated_memory >= size);
-+		ut_total_allocated_memory -= size;
-+		os_fast_mutex_unlock(&ut_list_mutex);
-+		UNIV_MEM_FREE(ptr, size);
-+	}
-+#else /* HAVE_SYS_IPC_H && HAVE_SYS_SHM_H */
-+	fprintf(stderr, "InnoDB: shared memory segment is not supported.\n");
-+#endif /* HAVE_SYS_IPC_H && HAVE_SYS_SHM_H */
-+}
-diff -ruN a/storage/innodb_plugin/srv/srv0srv.c b/storage/innodb_plugin/srv/srv0srv.c
---- a/storage/innodb_plugin/srv/srv0srv.c	2010-07-14 16:33:23.848391648 +0900
-+++ b/storage/innodb_plugin/srv/srv0srv.c	2010-07-14 16:40:16.177323553 +0900
-@@ -211,6 +211,11 @@
- UNIV_INTERN ulint	srv_mem_pool_size	= ULINT_MAX;
- UNIV_INTERN ulint	srv_lock_table_size	= ULINT_MAX;
- 
-+/* key value for shm */
-+UNIV_INTERN uint	srv_buffer_pool_shm_key	= 0;
-+UNIV_INTERN ibool	srv_buffer_pool_shm_is_reused = FALSE;
-+UNIV_INTERN ibool	srv_buffer_pool_shm_checksum = TRUE;
-+
- /* This parameter is deprecated. Use srv_n_io_[read|write]_threads
- instead. */
- UNIV_INTERN ulint	srv_n_file_io_threads	= ULINT_MAX;
-diff -ruN a/storage/innodb_plugin/srv/srv0start.c b/storage/innodb_plugin/srv/srv0start.c
---- a/storage/innodb_plugin/srv/srv0start.c	2010-07-14 16:33:23.851391514 +0900
-+++ b/storage/innodb_plugin/srv/srv0start.c	2010-07-14 16:40:16.180321173 +0900
-@@ -1750,6 +1750,8 @@
- 		Note that this is not as heavy weight as it seems. At
- 		this point there will be only ONE page in the buf_LRU
- 		and there must be no page in the buf_flush list. */
-+		/* buffer_pool_shm should not be reused when recovery was needed. */
-+		if (!srv_buffer_pool_shm_is_reused)
- 		buf_pool_invalidate();
- 
- 		/* We always try to do a recovery, even if the database had

=== modified file 'innodb_fast_shutdown.patch'
--- innodb_fast_shutdown.patch	2011-05-12 11:00:37 +0000
+++ innodb_fast_shutdown.patch	2011-06-21 09:06:00 +0000
@@ -165,7 +165,7 @@
 diff -ruN a/storage/innodb_plugin/srv/srv0srv.c b/storage/innodb_plugin/srv/srv0srv.c
 --- a/storage/innodb_plugin/srv/srv0srv.c	2010-11-16 21:33:00.000000000 +0300
 +++ b/storage/innodb_plugin/srv/srv0srv.c	2010-11-16 21:34:06.000000000 +0300
-@@ -713,6 +713,8 @@
+@@ -708,6 +708,8 @@
  
  UNIV_INTERN os_event_t	srv_lock_timeout_thread_event;
  
@@ -174,7 +174,7 @@
  UNIV_INTERN srv_sys_t*	srv_sys	= NULL;
  
  /* padding to prevent other memory update hotspots from residing on
-@@ -1018,6 +1020,7 @@
+@@ -1013,6 +1015,7 @@
  	}
  
  	srv_lock_timeout_thread_event = os_event_create(NULL);
@@ -182,7 +182,7 @@
  
  	for (i = 0; i < SRV_MASTER + 1; i++) {
  		srv_n_threads_active[i] = 0;
-@@ -2245,7 +2248,7 @@
+@@ -2240,7 +2243,7 @@
  	/* Wake up every 5 seconds to see if we need to print
  	monitor information. */
  
@@ -191,7 +191,7 @@
  
  	current_time = time(NULL);
  
-@@ -2387,7 +2390,7 @@
+@@ -2382,7 +2385,7 @@
  	/* When someone is waiting for a lock, we wake up every second
  	and check if a timeout has passed for a lock wait */
  
@@ -200,7 +200,7 @@
  
  	srv_lock_timeout_active = TRUE;
  
-@@ -2561,7 +2564,7 @@
+@@ -2556,7 +2559,7 @@
  
  	fflush(stderr);
  
@@ -209,7 +209,7 @@
  
  	if (srv_shutdown_state < SRV_SHUTDOWN_CLEANUP) {
  
-@@ -2605,7 +2608,7 @@
+@@ -2600,7 +2603,7 @@
  	last_dump_time = time(NULL);
  
  loop:
@@ -218,7 +218,7 @@
  
  	if (srv_shutdown_state >= SRV_SHUTDOWN_CLEANUP) {
  		goto exit_func;
-@@ -2788,7 +2791,7 @@
+@@ -2783,7 +2786,7 @@
  		if (!skip_sleep) {
  		if (next_itr_time > cur_time) {
  
@@ -227,7 +227,7 @@
  			srv_main_sleeps++;
  
  			/*
-@@ -3495,9 +3498,10 @@
+@@ -3490,9 +3493,10 @@
  		mutex_exit(&kernel_mutex);
  
  		sleep_ms = 10;