Commit a1e6710b authored by heikki@donna.mysql.fi's avatar heikki@donna.mysql.fi
Browse files

buf0buf.c Fixed a race condition in buf0lru and btr0sea which could corrupt the LRU list 

buf0lru.c	Fixed a race condition in buf0lru and btr0sea which could corrupt the LRU list
parent 9d0e3f30

BitKeeper/etc/logging_ok

+1 −0
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jani@hynda.mysql.fi

heikki@donna.mysql.fi

innobase/buf/buf0buf.c

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@@ -863,6 +863,19 @@ buf_page_get_known_nowait( 
	

	mutex_enter(&(buf_pool->mutex));



	if (block->state == BUF_BLOCK_REMOVE_HASH) {

	        /* Another thread is just freeing the block from the LRU list

	        of the buffer pool: do not try to access this page; this

		attempt to access the page can only come through the hash

		index because when the buffer block state is ..._REMOVE_HASH,

		we have already removed it from the page address hash table

		of the buffer pool. */



	        mutex_exit(&(buf_pool->mutex));



		return(FALSE);

	}



#ifdef UNIV_SYNC_DEBUG

	buf_block_buf_fix_inc_debug(block, file, line);

#else

innobase/buf/buf0lru.c

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@@ -138,6 +138,8 @@ buf_LRU_search_and_free_block( 


			mutex_enter(&(buf_pool->mutex));



			ut_a(block->buf_fix_count == 0);



			buf_LRU_block_free_hashed_page(block);



			freed = TRUE;