MDEV-12545 Reduce the amount of fil_space_t lookups

buf_flush_write_block_low(): Acquire the tablespace reference once,
and pass it to lower-level functions. This is only a start; further
calls may be removed later.

18 files changed, 309 insertions, 483 deletions

diff --git a/storage/innobase/buf/buf0buf.cc b/storage/innobase/buf/buf0buf.cc
index 2133457fcbb..bb567119a13 100644
--- a/storage/innobase/buf/buf0buf.cc
+++ b/storage/innobase/buf/buf0buf.cc
@@ -6080,71 +6080,54 @@ buf_pool_reserve_tmp_slot(
 	return (free_slot);
 }
 
-/********************************************************************//**
-Encrypts a buffer page right before it's flushed to disk
-@param[in,out]	bpage		Page control block
-@param[in,out]	src_frame	Source page
-@param[in]	space_id	Tablespace id
-@return either unencrypted source page or decrypted page.
-*/
+/** Encryption and page_compression hook that is called just before
+a page is written to disk.
+@param[in,out]	space		tablespace
+@param[in,out]	bpage		buffer page
+@param[in]	src_frame	physical page frame that is being encrypted
+@return	page frame to be written to file
+(may be src_frame or an encrypted/compressed copy of it) */
 UNIV_INTERN
 byte*
 buf_page_encrypt_before_write(
+	fil_space_t*	space,
 	buf_page_t*	bpage,
-	byte*		src_frame,
-	ulint		space_id)
+	byte*		src_frame)
 {
+	ut_ad(space->id == bpage->space);
 	bpage->real_size = UNIV_PAGE_SIZE;
 
 	fil_page_type_validate(src_frame);
 
-	if (bpage->offset == 0) {
+	switch (bpage->offset) {
+	case 0:
 		/* Page 0 of a tablespace is not encrypted/compressed */
 		ut_ad(bpage->key_version == 0);
 		return src_frame;
-	}
-
-	if (bpage->space == TRX_SYS_SPACE && bpage->offset == TRX_SYS_PAGE_NO) {
-		/* don't encrypt/compress page as it contains address to dblwr buffer */
-		bpage->key_version = 0;
-		return src_frame;
-	}
-
-	fil_space_t* space = fil_space_acquire_silent(space_id);
-
-	/* Tablespace must exist during write operation */
-	if (!space) {
-		/* This could be true on discard if we have injected a error
-		case e.g. in innodb.innodb-wl5522-debug-zip so that space
-		is already marked as stop_new_ops = true. */
-		return src_frame;
+	case TRX_SYS_PAGE_NO:
+		if (bpage->space == TRX_SYS_SPACE) {
+			/* don't encrypt/compress page as it contains
+			address to dblwr buffer */
+			bpage->key_version = 0;
+			return src_frame;
+		}
 	}
 
 	fil_space_crypt_t* crypt_data = space->crypt_data;
-	bool encrypted = true;
-
-	if (space->crypt_data != NULL && space->crypt_data->not_encrypted()) {
-		/* Encryption is disabled */
-		encrypted = false;
-	}
+	const bool encrypted = crypt_data
+		&& !crypt_data->not_encrypted()
+		&& crypt_data->type != CRYPT_SCHEME_UNENCRYPTED
+		&& (!crypt_data->is_default_encryption()
+		    || srv_encrypt_tables);
 
-	if (!srv_encrypt_tables && (crypt_data == NULL || crypt_data->is_default_encryption())) {
-		/* Encryption is disabled */
-		encrypted = false;
-	}
-
-	/* Is encryption needed? */
-	if (crypt_data == NULL || crypt_data->type == CRYPT_SCHEME_UNENCRYPTED) {
-		/* An unencrypted table */
+	if (!encrypted) {
 		bpage->key_version = 0;
-		encrypted = false;
 	}
 
-	bool page_compressed = fil_space_is_page_compressed(bpage->space);
+	bool page_compressed = FSP_FLAGS_HAS_PAGE_COMPRESSION(space->flags);
 
 	if (!encrypted && !page_compressed) {
 		/* No need to encrypt or page compress the page */
-		fil_space_release(space);
 		return src_frame;
 	}
 
@@ -6172,25 +6155,21 @@ buf_page_encrypt_before_write(
 		bpage->real_size = page_size;
 		slot->out_buf = dst_frame = tmp;
 
-#ifdef UNIV_DEBUG
-		fil_page_type_validate(tmp);
-#endif
-
+		ut_d(fil_page_type_validate(tmp));
 	} else {
 		/* First we compress the page content */
 		ulint out_len = 0;
-		ulint block_size = fil_space_get_block_size(bpage->space, bpage->offset, page_size);
-
-		byte *tmp = fil_compress_page(bpage->space,
-					(byte *)src_frame,
-					slot->comp_buf,
-					page_size,
-					fil_space_get_page_compression_level(bpage->space),
-					block_size,
-					encrypted,
-					&out_len,
-					IF_LZO(slot->lzo_mem, NULL)
-					);
+
+		byte *tmp = fil_compress_page(
+			space,
+			(byte *)src_frame,
+			slot->comp_buf,
+			page_size,
+			fsp_flags_get_page_compression_level(space->flags),
+			fil_space_get_block_size(space, bpage->offset),
+			encrypted,
+			&out_len,
+			IF_LZO(slot->lzo_mem, NULL));
 
 		bpage->real_size = out_len;
 
@@ -6215,7 +6194,6 @@ buf_page_encrypt_before_write(
 	fil_page_type_validate(dst_frame);
 #endif
 
-	fil_space_release(space);
 	// return dst_frame which will be written
 	return dst_frame;
 }
diff --git a/storage/innobase/buf/buf0dblwr.cc b/storage/innobase/buf/buf0dblwr.cc
index f99679f6fec..cedbff96a67 100644
--- a/storage/innobase/buf/buf0dblwr.cc
+++ b/storage/innobase/buf/buf0dblwr.cc
@@ -986,7 +986,7 @@ flush:
 	srv_stats.dblwr_writes.inc();
 
 	/* Now flush the doublewrite buffer data to disk */
-	fil_flush(TRX_SYS_SPACE);
+	fil_flush(ulint(TRX_SYS_SPACE));
 
 	/* We know that the writes have been flushed to disk now
 	and in recovery we will find them in the doublewrite buffer
@@ -1231,7 +1231,7 @@ retry:
 	}
 
 	/* Now flush the doublewrite buffer data to disk */
-	fil_flush(TRX_SYS_SPACE);
+	fil_flush(ulint(TRX_SYS_SPACE));
 
 	/* We know that the write has been flushed to disk now
 	and during recovery we will find it in the doublewrite buffer
diff --git a/storage/innobase/buf/buf0flu.cc b/storage/innobase/buf/buf0flu.cc
index 3f03ee8256f..87a5386ce25 100644
--- a/storage/innobase/buf/buf0flu.cc
+++ b/storage/innobase/buf/buf0flu.cc
@@ -831,11 +831,12 @@ buf_flush_write_block_low(
 	buf_flush_t	flush_type,	/*!< in: type of flush */
 	bool		sync)		/*!< in: true if sync IO request */
 {
+	fil_space_t*	space = fil_space_acquire(bpage->space, true);
+	if (!space) {
+		return;
+	}
 	ulint	zip_size	= buf_page_get_zip_size(bpage);
 	page_t*	frame		= NULL;
-	ulint space_id          = buf_page_get_space(bpage);
-	atomic_writes_t awrites = fil_space_get_atomic_writes(space_id);
-
 #ifdef UNIV_DEBUG
 	buf_pool_t*	buf_pool = buf_pool_from_bpage(bpage);
 	ut_ad(!buf_pool_mutex_own(buf_pool));
@@ -906,7 +907,7 @@ buf_flush_write_block_low(
 		break;
 	}
 
-	frame = buf_page_encrypt_before_write(bpage, frame, space_id);
+	frame = buf_page_encrypt_before_write(space, bpage, frame);
 
 	if (!srv_use_doublewrite_buf || !buf_dblwr) {
 		fil_io(OS_FILE_WRITE | OS_AIO_SIMULATED_WAKE_LATER,
@@ -928,7 +929,8 @@ buf_flush_write_block_low(
 		atomic writes should be used, no doublewrite buffer
 		is used. */
 
-		if (awrites == ATOMIC_WRITES_ON) {
+		if (fsp_flags_get_atomic_writes(space->flags)
+		    == ATOMIC_WRITES_ON) {
 			fil_io(OS_FILE_WRITE | OS_AIO_SIMULATED_WAKE_LATER,
 				FALSE,
 				buf_page_get_space(bpage),
@@ -952,13 +954,15 @@ buf_flush_write_block_low(
 	are working on. */
 	if (sync) {
 		ut_ad(flush_type == BUF_FLUSH_SINGLE_PAGE);
-		fil_flush(buf_page_get_space(bpage));
+		fil_flush(space);
 
 		/* true means we want to evict this page from the
 		LRU list as well. */
 		buf_page_io_complete(bpage, true);
 	}
 
+	fil_space_release(space);
+
 	/* Increment the counter of I/O operations used
 	for selecting LRU policy. */
 	buf_LRU_stat_inc_io();
diff --git a/storage/innobase/fil/fil0fil.cc b/storage/innobase/fil/fil0fil.cc
index ceda86e16b6..2a812fa8a9f 100644
--- a/storage/innobase/fil/fil0fil.cc
+++ b/storage/innobase/fil/fil0fil.cc
@@ -5956,31 +5956,34 @@ fil_space_get_node(
 
 	return (node);
 }
-/********************************************************************//**
-Return block size of node in file space
-@return file block size */
+
+/** Determine the block size of the data file.
+@param[in]	space		tablespace
+@param[in]	offset		page number
+@return	block size */
 UNIV_INTERN
 ulint
-fil_space_get_block_size(
-/*=====================*/
-	ulint	space_id,
-	ulint	block_offset,
-	ulint	len)
+fil_space_get_block_size(const fil_space_t* space, unsigned offset)
 {
-	ulint block_size = 512;
-	ut_ad(!mutex_own(&fil_system->mutex));
-
-	mutex_enter(&fil_system->mutex);
-	fil_space_t* space = fil_space_get_space(space_id);
+	ut_ad(space->n_pending_ops > 0);
 
-	if (space) {
-		fil_node_t* node = fil_space_get_node(space, space_id, &block_offset, 0, len);
+	ulint block_size = 512;
 
-		if (node) {
-			block_size = node->file_block_size;
+	for (fil_node_t* node = UT_LIST_GET_FIRST(space->chain);
+	     node != NULL;
+	     node = UT_LIST_GET_NEXT(chain, node)) {
+		block_size = node->file_block_size;
+		if (node->size > offset) {
+			break;
 		}
+		offset -= node->size;
+	}
+
+	/* Currently supporting block size up to 4K,
+	fall back to default if bigger requested. */
+	if (block_size > 4096) {
+		block_size = 512;
 	}
-	mutex_exit(&fil_system->mutex);
 
 	return block_size;
 }
@@ -6334,14 +6337,29 @@ fil_flush(
 	mutex_exit(&fil_system->mutex);
 }
 
-/**********************************************************************//**
-Flushes to disk the writes in file spaces of the given type possibly cached by
-the OS. */
+/** Flush a tablespace.
+@param[in,out]	space	tablespace to flush */
 UNIV_INTERN
 void
-fil_flush_file_spaces(
-/*==================*/
-	ulint	purpose)	/*!< in: FIL_TABLESPACE, FIL_LOG */
+fil_flush(fil_space_t* space)
+{
+	ut_ad(space->n_pending_ops > 0);
+
+	if (!space->is_stopping()) {
+		mutex_enter(&fil_system->mutex);
+		if (!space->is_stopping()) {
+			fil_flush_low(space);
+		}
+		mutex_exit(&fil_system->mutex);
+	}
+}
+
+/** Flush to disk the writes in file spaces of the given type
+possibly cached by the OS.
+@param[in]	purpose	FIL_TYPE_TABLESPACE or FIL_TYPE_LOG */
+UNIV_INTERN
+void
+fil_flush_file_spaces(ulint purpose)
 {
 	fil_space_t*	space;
 	ulint*		space_ids;
@@ -6769,12 +6787,14 @@ fil_iterate(
 
 			if (page_compressed) {
 				ulint len = 0;
-				fil_compress_page(space_id,
+
+				fil_compress_page(
+					NULL,
 					src,
 					NULL,
 					size,
-					fil_space_get_page_compression_level(space_id),
-					fil_space_get_block_size(space_id, offset, size),
+					0,/* FIXME: compression level */
+					512,/* FIXME: use proper block size */
 					encrypted,
 					&len,
 					NULL);
@@ -6785,6 +6805,8 @@ fil_iterate(
 			/* If tablespace is encrypted, encrypt page before we
 			write it back. Note that we should not encrypt the
 			buffer that is in buffer pool. */
+			/* NOTE: At this stage of IMPORT the
+			buffer pool is not being used at all! */
 			if (decrypted && encrypted) {
 				byte *dest = writeptr + (i * size);
 				ulint space = mach_read_from_4(
diff --git a/storage/innobase/fil/fil0pagecompress.cc b/storage/innobase/fil/fil0pagecompress.cc
index 42f894f08d7..73df69beb90 100644
--- a/storage/innobase/fil/fil0pagecompress.cc
+++ b/storage/innobase/fil/fil0pagecompress.cc
@@ -1,6 +1,6 @@
 /*****************************************************************************
 
-Copyright (C) 2013, 2016, MariaDB Corporation. All Rights Reserved.
+Copyright (C) 2013, 2017, MariaDB Corporation. 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
@@ -91,8 +91,7 @@ UNIV_INTERN
 byte*
 fil_compress_page(
 /*==============*/
-	ulint	space_id,	/*!< in: tablespace id of the
-				table. */
+	fil_space_t*	space,	/*!< in,out: tablespace (NULL during IMPORT) */
 	byte*	buf,		/*!< in: buffer from which to write; in aio
 				this must be appropriately aligned */
 	byte*	out_buf,	/*!< out: compressed buffer */
@@ -110,9 +109,12 @@ fil_compress_page(
 	ulint write_size=0;
 	/* Cache to avoid change during function execution */
 	ulint comp_method = innodb_compression_algorithm;
-	ulint orig_page_type;
 	bool allocated=false;
 
+	/* page_compression does not apply to tables or tablespaces
+	that use ROW_FORMAT=COMPRESSED */
+	ut_ad(!space || !FSP_FLAGS_GET_ZIP_SSIZE(space->flags));
+
 	if (encrypted) {
 		header_len += FIL_PAGE_COMPRESSION_METHOD_SIZE;
 	}
@@ -133,21 +135,14 @@ fil_compress_page(
 	ut_ad(len);
 	ut_ad(out_len);
 
-	/* read original page type */
-	orig_page_type = mach_read_from_2(buf + FIL_PAGE_TYPE);
-
-	fil_system_enter();
-	fil_space_t* space = fil_space_get_by_id(space_id);
-	fil_system_exit();
-
 	/* Let's not compress file space header or
 	extent descriptor */
-	if (orig_page_type == 0 ||
-	    orig_page_type == FIL_PAGE_TYPE_FSP_HDR ||
-	    orig_page_type == FIL_PAGE_TYPE_XDES ||
-		orig_page_type == FIL_PAGE_PAGE_COMPRESSED) {
+	switch (fil_page_get_type(buf)) {
+	case 0:
+	case FIL_PAGE_TYPE_FSP_HDR:
+	case FIL_PAGE_TYPE_XDES:
+	case FIL_PAGE_PAGE_COMPRESSED:
 		*out_len = len;
-
 		goto err_exit;
 	}
 
@@ -157,11 +152,11 @@ fil_compress_page(
 		comp_level = page_zip_level;
 	}
 
-#ifdef UNIV_PAGECOMPRESS_DEBUG
-	ib_logf(IB_LOG_LEVEL_INFO,
-		"Preparing for compress for space %lu name %s len %lu.",
-		space_id, fil_space_name(space), len);
-#endif /* UNIV_PAGECOMPRESS_DEBUG */
+	DBUG_PRINT("compress",
+		   ("Preparing for space " ULINTPF " '%s' len " ULINTPF,
+		    space ? space->id : 0,
+		    space ? space->name : "(import)",
+		    len));
 
 	write_size = UNIV_PAGE_SIZE - header_len;
 
@@ -306,10 +301,13 @@ fil_compress_page(
 		if (err != Z_OK) {
 			/* If error we leave the actual page as it was */
 
-			if (space->printed_compression_failure == false) {
+			if (space && !space->printed_compression_failure) {
 				ib_logf(IB_LOG_LEVEL_WARN,
-					"Compression failed for space %lu name %s len %lu rt %d write %lu.",
-					space_id, fil_space_name(space), len, err, write_size);
+					"Compression failed for space "
+					ULINTPF " name %s len " ULINTPF
+					" rt %d write " ULINTPF ".",
+					space->id, space->name, len, err,
+					write_size);
 				space->printed_compression_failure = true;
 			}
 
@@ -367,9 +365,8 @@ fil_compress_page(
 
 		fil_decompress_page(uncomp_page, comp_page, ulong(len), NULL);
 
-		if(buf_page_is_corrupted(false, uncomp_page, 0, space)) {
-			buf_page_print(uncomp_page, 0, BUF_PAGE_PRINT_NO_CRASH);
-			ut_error;
+		if (buf_page_is_corrupted(false, uncomp_page, 0, space)) {
+			buf_page_print(uncomp_page, 0, 0);
 		}
 
 		ut_free(comp_page);
@@ -388,7 +385,6 @@ fil_compress_page(
 	/* Actual write needs to be alligned on block size */
 	if (write_size % block_size) {
 		size_t tmp = write_size;
-
 		write_size =  (size_t)ut_uint64_align_up((ib_uint64_t)write_size, block_size);
 		/* Clean up the end of buffer */
 		memset(out_buf+tmp, 0, write_size - tmp);
@@ -398,11 +394,12 @@ fil_compress_page(
 #endif
 	}
 
-#ifdef UNIV_PAGECOMPRESS_DEBUG
-	ib_logf(IB_LOG_LEVEL_INFO,
-		"Compression succeeded for space %lu name %s len %lu out_len %lu.",
-		space_id, fil_space_name(space), len, write_size);
-#endif /* UNIV_PAGECOMPRESS_DEBUG */
+	DBUG_PRINT("compress",
+		   ("Succeeded for space " ULINTPF
+		    " '%s' len " ULINTPF " out_len " ULINTPF,
+		    space ? space->id : 0,
+		    space ? space->name : "(import)",
+		    len, write_size));
 
 	srv_stats.page_compression_saved.add((len - write_size));
 	srv_stats.pages_page_compressed.inc();
diff --git a/storage/innobase/include/buf0buf.h b/storage/innobase/include/buf0buf.h
index 643e8c731e5..b4d39351370 100644
--- a/storage/innobase/include/buf0buf.h
+++ b/storage/innobase/include/buf0buf.h
@@ -1502,17 +1502,19 @@ buf_flush_update_zip_checksum(
 
 #endif /* !UNIV_HOTBACKUP */
 
-/********************************************************************//**
-The hook that is called just before a page is written to disk.
-The function encrypts the content of the page and returns a pointer
-to a frame that will be written instead of the real frame. */
+/** Encryption and page_compression hook that is called just before
+a page is written to disk.
+@param[in,out]	space		tablespace
+@param[in,out]	bpage		buffer page
+@param[in]	src_frame	physical page frame that is being encrypted
+@return	page frame to be written to file
+(may be src_frame or an encrypted/compressed copy of it) */
 UNIV_INTERN
 byte*
 buf_page_encrypt_before_write(
-/*==========================*/
-	buf_page_t*	page,		/*!< in/out: buffer page to be flushed */
-	byte*		frame,		/*!< in: src frame */
-	ulint		space_id);	/*!< in: space id */
+	fil_space_t*	space,
+	buf_page_t*	bpage,
+	byte*		src_frame);
 
 /**********************************************************************
 The hook that is called after page is written to disk.
diff --git a/storage/innobase/include/fil0fil.h b/storage/innobase/include/fil0fil.h
index 3d7ae49f8ae..ba9e5029c6d 100644
--- a/storage/innobase/include/fil0fil.h
+++ b/storage/innobase/include/fil0fil.h
@@ -1135,14 +1135,18 @@ fil_flush(
 /*======*/
 	ulint	space_id);	/*!< in: file space id (this can be a group of
 				log files or a tablespace of the database) */
-/**********************************************************************//**
-Flushes to disk writes in file spaces of the given type possibly cached by
-the OS. */
+/** Flush a tablespace.
+@param[in,out]	space	tablespace to flush */
 UNIV_INTERN
 void
-fil_flush_file_spaces(
-/*==================*/
-	ulint	purpose);	/*!< in: FIL_TABLESPACE, FIL_LOG */
+fil_flush(fil_space_t* space);
+
+/** Flush to disk the writes in file spaces of the given type
+possibly cached by the OS.
+@param[in]	purpose	FIL_TYPE_TABLESPACE or FIL_TYPE_LOG */
+UNIV_INTERN
+void
+fil_flush_file_spaces(ulint purpose);
 /******************************************************************//**
 Checks the consistency of the tablespace cache.
 @return	TRUE if ok */
@@ -1430,18 +1434,13 @@ fil_get_next_space_safe(
 /*====================*/
 	ulint	id);	/*!< in: previous space id */
 
-
-/*******************************************************************//**
-Returns the block size of the file space
+/** Determine the block size of the data file.
+@param[in]	space		tablespace
+@param[in]	offset		page number
 @return	block size */
 UNIV_INTERN
 ulint
-fil_space_get_block_size(
-/*=====================*/
-	ulint	id,	/*!< in: space id */
-	ulint   offset, /*!< in: page offset */
-	ulint   len);	/*!< in: page len */
-
+fil_space_get_block_size(const fil_space_t* space, unsigned offset);
 #endif /* UNIV_INNOCHECKSUM */
 
 #ifndef UNIV_INNOCHECKSUM
diff --git a/storage/innobase/include/fil0pagecompress.h b/storage/innobase/include/fil0pagecompress.h
index 1fe5cb66bf6..73667c5420e 100644
--- a/storage/innobase/include/fil0pagecompress.h
+++ b/storage/innobase/include/fil0pagecompress.h
@@ -31,33 +31,6 @@ Created 11/12/2013 Jan Lindström jan.lindstrom@skysql.com
 ***********************************************************************/
 
 /*******************************************************************//**
-Returns the page compression level flag of the space, or 0 if the space
-is not compressed. The tablespace must be cached in the memory cache.
-@return	page compression level if page compressed, ULINT_UNDEFINED if space not found */
-UNIV_INLINE
-ulint
-fil_space_get_page_compression_level(
-/*=================================*/
-	ulint	id);	/*!< in: space id */
-/*******************************************************************//**
-Returns the page compression flag of the space, or false if the space
-is not compressed. The tablespace must be cached in the memory cache.
-@return	true if page compressed, false if not or space not found */
-UNIV_INLINE
-bool
-fil_space_is_page_compressed(
-/*=========================*/
-	ulint	id);	/*!< in: space id */
-/*******************************************************************//**
-Returns the atomic writes flag of the space, or false if the space
-is not using atomic writes. The tablespace must be cached in the memory cache.
-@return	atomic write table option value */
-UNIV_INLINE
-atomic_writes_t
-fil_space_get_atomic_writes(
-/*=========================*/
-	ulint	id);	/*!< in: space id */
-/*******************************************************************//**
 Find out wheather the page is index page or not
 @return	true if page type index page, false if not */
 UNIV_INLINE
@@ -84,8 +57,7 @@ UNIV_INTERN
 byte*
 fil_compress_page(
 /*==============*/
-	ulint	space_id,	/*!< in: tablespace id of the
-				table. */
+	fil_space_t*	space,	/*!< in,out: tablespace (NULL during IMPORT) */
 	byte*	buf,		/*!< in: buffer from which to write; in aio
 				this must be appropriately aligned */
 	byte*	out_buf,	/*!< out: compressed buffer */
diff --git a/storage/innobase/include/fsp0pagecompress.ic b/storage/innobase/include/fsp0pagecompress.ic
index 48163277feb..14f968e319e 100644
--- a/storage/innobase/include/fsp0pagecompress.ic
+++ b/storage/innobase/include/fsp0pagecompress.ic
@@ -85,47 +85,6 @@ fil_page_is_compressed_encrypted(
 	return(mach_read_from_2(buf+FIL_PAGE_TYPE) == FIL_PAGE_PAGE_COMPRESSED_ENCRYPTED);
 }
 
-#ifndef UNIV_INNOCHECKSUM
-/*******************************************************************//**
-Returns the page compression level of the space, or 0 if the space
-is not compressed. The tablespace must be cached in the memory cache.
-@return	page compression level, 0 if space not found */
-UNIV_INLINE
-ulint
-fil_space_get_page_compression_level(
-/*=================================*/
-	ulint	id)	/*!< in: space id */
-{
-	ulint	flags;
-
-	flags = fil_space_get_flags(id);
-
-	if (flags && flags != ULINT_UNDEFINED) {
-
-		return(fsp_flags_get_page_compression_level(flags));
-	}
-
-	return(0);
-}
-
-/*******************************************************************//**
-Extract the page compression from space.
-@return true if space is page compressed, false if space is not found
-or space is not page compressed. */
-UNIV_INLINE
-bool
-fil_space_is_page_compressed(
-/*=========================*/
-	ulint	id)	/*!< in: space id */
-{
-	ulint	flags = fil_space_get_flags(id);
-
-	return(flags != ULINT_UNDEFINED
-	       && FSP_FLAGS_HAS_PAGE_COMPRESSION(flags));
-}
-
-#endif /* UNIV_INNOCHECKSUM */
-
 /****************************************************************//**
 Get the name of the compression algorithm used for page
 compression.
@@ -166,28 +125,6 @@ fil_get_compression_alg_name(
 
 #ifndef UNIV_INNOCHECKSUM
 /*******************************************************************//**
-Returns the atomic writes flag of the space, or false if the space
-is not using atomic writes. The tablespace must be cached in the memory cache.
-@return	atomic writes table option value */
-UNIV_INLINE
-atomic_writes_t
-fil_space_get_atomic_writes(
-/*========================*/
-	ulint	id)	/*!< in: space id */
-{
-	ulint	flags;
-
-	flags = fil_space_get_flags(id);
-
-	if (flags && flags != ULINT_UNDEFINED) {
-
-		return((atomic_writes_t)fsp_flags_get_atomic_writes(flags));
-	}
-
-	return((atomic_writes_t)0);
-}
-
-/*******************************************************************//**
 Find out wheather the page is page compressed with lzo method
 @return	true if page is page compressed with lzo method, false if not */
 UNIV_INLINE
diff --git a/storage/xtradb/buf/buf0buf.cc b/storage/xtradb/buf/buf0buf.cc
index 7f77f96c2fe..394d2be6838 100644
--- a/storage/xtradb/buf/buf0buf.cc
+++ b/storage/xtradb/buf/buf0buf.cc
@@ -6241,70 +6241,54 @@ buf_pool_reserve_tmp_slot(
 	return (free_slot);
 }
 
-/********************************************************************//**
-Encrypts a buffer page right before it's flushed to disk
-@param[in,out]	bpage		Page control block
-@param[in,out]	src_frame	Source page
-@param[in]	space_id	Tablespace id
-@return either unencrypted source page or decrypted page.
-*/
+/** Encryption and page_compression hook that is called just before
+a page is written to disk.
+@param[in,out]	space		tablespace
+@param[in,out]	bpage		buffer page
+@param[in]	src_frame	physical page frame that is being encrypted
+@return	page frame to be written to file
+(may be src_frame or an encrypted/compressed copy of it) */
+UNIV_INTERN
 byte*
 buf_page_encrypt_before_write(
+	fil_space_t*	space,
 	buf_page_t*	bpage,
-	byte*		src_frame,
-	ulint		space_id)
+	byte*		src_frame)
 {
+	ut_ad(space->id == bpage->space);
 	bpage->real_size = UNIV_PAGE_SIZE;
 
 	fil_page_type_validate(src_frame);
 
-	if (bpage->offset == 0) {
+	switch (bpage->offset) {
+	case 0:
 		/* Page 0 of a tablespace is not encrypted/compressed */
 		ut_ad(bpage->key_version == 0);
 		return src_frame;
-	}
-
-	if (bpage->space == TRX_SYS_SPACE && bpage->offset == TRX_SYS_PAGE_NO) {
-		/* don't encrypt/compress page as it contains address to dblwr buffer */
-		bpage->key_version = 0;
-		return src_frame;
-	}
-
-	fil_space_t* space = fil_space_acquire_silent(space_id);
-
-	/* Tablespace must exist during write operation */
-	if (!space) {
-		/* This could be true on discard if we have injected a error
-		case e.g. in innodb.innodb-wl5522-debug-zip so that space
-		is already marked as stop_new_ops = true. */
-		return src_frame;
+	case TRX_SYS_PAGE_NO:
+		if (bpage->space == TRX_SYS_SPACE) {
+			/* don't encrypt/compress page as it contains
+			address to dblwr buffer */
+			bpage->key_version = 0;
+			return src_frame;
+		}
 	}
 
 	fil_space_crypt_t* crypt_data = space->crypt_data;
-	bool encrypted = true;
-
-	if (space->crypt_data != NULL && space->crypt_data->not_encrypted()) {
-		/* Encryption is disabled */
-		encrypted = false;
-	}
+	const bool encrypted = crypt_data
+		&& !crypt_data->not_encrypted()
+		&& crypt_data->type != CRYPT_SCHEME_UNENCRYPTED
+		&& (!crypt_data->is_default_encryption()
+		    || srv_encrypt_tables);
 
-	if (!srv_encrypt_tables && (crypt_data == NULL || crypt_data->is_default_encryption())) {
-		/* Encryption is disabled */
-		encrypted = false;
-	}
-
-	/* Is encryption needed? */
-	if (crypt_data == NULL || crypt_data->type == CRYPT_SCHEME_UNENCRYPTED) {
-		/* An unencrypted table */
+	if (!encrypted) {
 		bpage->key_version = 0;
-		encrypted = false;
 	}
 
-	bool page_compressed = fil_space_is_page_compressed(bpage->space);
+	bool page_compressed = FSP_FLAGS_HAS_PAGE_COMPRESSION(space->flags);
 
 	if (!encrypted && !page_compressed) {
 		/* No need to encrypt or page compress the page */
-		fil_space_release(space);
 		return src_frame;
 	}
 
@@ -6332,25 +6316,21 @@ buf_page_encrypt_before_write(
 		bpage->real_size = page_size;
 		slot->out_buf = dst_frame = tmp;
 
-#ifdef UNIV_DEBUG
-		fil_page_type_validate(tmp);
-#endif
-
+		ut_d(fil_page_type_validate(tmp));
 	} else {
 		/* First we compress the page content */
 		ulint out_len = 0;
-		ulint block_size = fil_space_get_block_size(bpage->space, bpage->offset, page_size);
-
-		byte *tmp = fil_compress_page(bpage->space,
-					(byte *)src_frame,
-					slot->comp_buf,
-					page_size,
-					fil_space_get_page_compression_level(bpage->space),
-					block_size,
-					encrypted,
-					&out_len,
-					IF_LZO(slot->lzo_mem, NULL)
-					);
+
+		byte *tmp = fil_compress_page(
+			space,
+			(byte *)src_frame,
+			slot->comp_buf,
+			page_size,
+			fsp_flags_get_page_compression_level(space->flags),
+			fil_space_get_block_size(space, bpage->offset),
+			encrypted,
+			&out_len,
+			IF_LZO(slot->lzo_mem, NULL));
 
 		bpage->real_size = out_len;
 
@@ -6375,7 +6355,6 @@ buf_page_encrypt_before_write(
 	fil_page_type_validate(dst_frame);
 #endif
 
-	fil_space_release(space);
 	// return dst_frame which will be written
 	return dst_frame;
 }
diff --git a/storage/xtradb/buf/buf0dblwr.cc b/storage/xtradb/buf/buf0dblwr.cc
index ddef13ef8ea..55c5e4d543a 100644
--- a/storage/xtradb/buf/buf0dblwr.cc
+++ b/storage/xtradb/buf/buf0dblwr.cc
@@ -1001,7 +1001,7 @@ flush:
 	srv_stats.dblwr_writes.inc();
 
 	/* Now flush the doublewrite buffer data to disk */
-	fil_flush(TRX_SYS_SPACE);
+	fil_flush(ulint(TRX_SYS_SPACE));
 
 	/* We know that the writes have been flushed to disk now
 	and in recovery we will find them in the doublewrite buffer
@@ -1249,7 +1249,7 @@ retry:
 	}
 
 	/* Now flush the doublewrite buffer data to disk */
-	fil_flush(TRX_SYS_SPACE);
+	fil_flush(ulint(TRX_SYS_SPACE));
 
 	/* We know that the write has been flushed to disk now
 	and during recovery we will find it in the doublewrite buffer
diff --git a/storage/xtradb/buf/buf0flu.cc b/storage/xtradb/buf/buf0flu.cc
index 4804d71a51f..f71bdb9f69a 100644
--- a/storage/xtradb/buf/buf0flu.cc
+++ b/storage/xtradb/buf/buf0flu.cc
@@ -873,11 +873,12 @@ buf_flush_write_block_low(
 	buf_flush_t	flush_type,	/*!< in: type of flush */
 	bool		sync)		/*!< in: true if sync IO request */
 {
+	fil_space_t*	space = fil_space_acquire(bpage->space, true);
+	if (!space) {
+		return;
+	}
 	ulint	zip_size	= buf_page_get_zip_size(bpage);
 	page_t*	frame		= NULL;
-	ulint space_id          = buf_page_get_space(bpage);
-	atomic_writes_t awrites = fil_space_get_atomic_writes(space_id);
-
 #ifdef UNIV_DEBUG
 	buf_pool_t*	buf_pool = buf_pool_from_bpage(bpage);
 	ut_ad(!mutex_own(&buf_pool->LRU_list_mutex));
@@ -947,7 +948,7 @@ buf_flush_write_block_low(
 		break;
 	}
 
-	frame = buf_page_encrypt_before_write(bpage, frame, space_id);
+	frame = buf_page_encrypt_before_write(space, bpage, frame);
 
 	if (!srv_use_doublewrite_buf || !buf_dblwr) {
 		fil_io(OS_FILE_WRITE | OS_AIO_SIMULATED_WAKE_LATER,
@@ -968,7 +969,8 @@ buf_flush_write_block_low(
 		atomic writes should be used, no doublewrite buffer
 		is used. */
 
-		if (awrites == ATOMIC_WRITES_ON) {
+		if (fsp_flags_get_atomic_writes(space->flags)
+		    == ATOMIC_WRITES_ON) {
 			fil_io(OS_FILE_WRITE | OS_AIO_SIMULATED_WAKE_LATER,
 				FALSE,
 				buf_page_get_space(bpage),
@@ -991,10 +993,12 @@ buf_flush_write_block_low(
 	are working on. */
 	if (sync) {
 		ut_ad(flush_type == BUF_FLUSH_SINGLE_PAGE);
-		fil_flush(buf_page_get_space(bpage));
+		fil_flush(space);
 		buf_page_io_complete(bpage);
 	}
 
+	fil_space_release(space);
+
 	/* Increment the counter of I/O operations used
 	for selecting LRU policy. */
 	buf_LRU_stat_inc_io();
diff --git a/storage/xtradb/fil/fil0fil.cc b/storage/xtradb/fil/fil0fil.cc
index fba7d5d8e38..e504ab3947e 100644
--- a/storage/xtradb/fil/fil0fil.cc
+++ b/storage/xtradb/fil/fil0fil.cc
@@ -5993,31 +5993,34 @@ fil_space_get_node(
 
 	return (node);
 }
-/********************************************************************//**
-Return block size of node in file space
-@return file block size */
+
+/** Determine the block size of the data file.
+@param[in]	space		tablespace
+@param[in]	offset		page number
+@return	block size */
 UNIV_INTERN
 ulint
-fil_space_get_block_size(
-/*=====================*/
-	ulint	space_id,
-	ulint	block_offset,
-	ulint	len)
+fil_space_get_block_size(const fil_space_t* space, unsigned offset)
 {
-	ulint block_size = 512;
-	ut_ad(!mutex_own(&fil_system->mutex));
-
-	mutex_enter(&fil_system->mutex);
-	fil_space_t* space = fil_space_get_space(space_id);
+	ut_ad(space->n_pending_ops > 0);
 
-	if (space) {
-		fil_node_t* node = fil_space_get_node(space, space_id, &block_offset, 0, len);
+	ulint block_size = 512;
 
-		if (node) {
-			block_size = node->file_block_size;
+	for (fil_node_t* node = UT_LIST_GET_FIRST(space->chain);
+	     node != NULL;
+	     node = UT_LIST_GET_NEXT(chain, node)) {
+		block_size = node->file_block_size;
+		if (node->size > offset) {
+			break;
 		}
+		offset -= node->size;
+	}
+
+	/* Currently supporting block size up to 4K,
+	fall back to default if bigger requested. */
+	if (block_size > 4096) {
+		block_size = 512;
 	}
-	mutex_exit(&fil_system->mutex);
 
 	return block_size;
 }
@@ -6398,14 +6401,29 @@ fil_flush(
 	mutex_exit(&fil_system->mutex);
 }
 
-/**********************************************************************//**
-Flushes to disk the writes in file spaces of the given type possibly cached by
-the OS. */
+/** Flush a tablespace.
+@param[in,out]	space	tablespace to flush */
 UNIV_INTERN
 void
-fil_flush_file_spaces(
-/*==================*/
-	ulint	purpose)	/*!< in: FIL_TABLESPACE, FIL_LOG */
+fil_flush(fil_space_t* space)
+{
+	ut_ad(space->n_pending_ops > 0);
+
+	if (!space->is_stopping()) {
+		mutex_enter(&fil_system->mutex);
+		if (!space->is_stopping()) {
+			fil_flush_low(space);
+		}
+		mutex_exit(&fil_system->mutex);
+	}
+}
+
+/** Flush to disk the writes in file spaces of the given type
+possibly cached by the OS.
+@param[in]	purpose	FIL_TYPE_TABLESPACE or FIL_TYPE_LOG */
+UNIV_INTERN
+void
+fil_flush_file_spaces(ulint purpose)
 {
 	fil_space_t*	space;
 	ulint*		space_ids;
@@ -6833,12 +6851,14 @@ fil_iterate(
 
 			if (page_compressed) {
 				ulint len = 0;
-				fil_compress_page(space_id,
+
+				fil_compress_page(
+					NULL,
 					src,
 					NULL,
 					size,
-					fil_space_get_page_compression_level(space_id),
-					fil_space_get_block_size(space_id, offset, size),
+					0,/* FIXME: compression level */
+					512,/* FIXME: use proper block size */
 					encrypted,
 					&len,
 					NULL);
@@ -6849,6 +6869,8 @@ fil_iterate(
 			/* If tablespace is encrypted, encrypt page before we
 			write it back. Note that we should not encrypt the
 			buffer that is in buffer pool. */
+			/* NOTE: At this stage of IMPORT the
+			buffer pool is not being used at all! */
 			if (decrypted && encrypted) {
 				byte *dest = writeptr + (i * size);
 				ulint space = mach_read_from_4(
diff --git a/storage/xtradb/fil/fil0pagecompress.cc b/storage/xtradb/fil/fil0pagecompress.cc
index 655460c57ac..73df69beb90 100644
--- a/storage/xtradb/fil/fil0pagecompress.cc
+++ b/storage/xtradb/fil/fil0pagecompress.cc
@@ -1,6 +1,6 @@
 /*****************************************************************************
 
-Copyright (C) 2013, 2016, MariaDB Corporation. All Rights Reserved.
+Copyright (C) 2013, 2017, MariaDB Corporation. 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
@@ -91,8 +91,7 @@ UNIV_INTERN
 byte*
 fil_compress_page(
 /*==============*/
-	ulint	space_id,	/*!< in: tablespace id of the
-				table. */
+	fil_space_t*	space,	/*!< in,out: tablespace (NULL during IMPORT) */
 	byte*	buf,		/*!< in: buffer from which to write; in aio
 				this must be appropriately aligned */
 	byte*	out_buf,	/*!< out: compressed buffer */
@@ -110,9 +109,12 @@ fil_compress_page(
 	ulint write_size=0;
 	/* Cache to avoid change during function execution */
 	ulint comp_method = innodb_compression_algorithm;
-	ulint orig_page_type;
 	bool allocated=false;
 
+	/* page_compression does not apply to tables or tablespaces
+	that use ROW_FORMAT=COMPRESSED */
+	ut_ad(!space || !FSP_FLAGS_GET_ZIP_SSIZE(space->flags));
+
 	if (encrypted) {
 		header_len += FIL_PAGE_COMPRESSION_METHOD_SIZE;
 	}
@@ -133,21 +135,14 @@ fil_compress_page(
 	ut_ad(len);
 	ut_ad(out_len);
 
-	/* read original page type */
-	orig_page_type = mach_read_from_2(buf + FIL_PAGE_TYPE);
-
-	fil_system_enter();
-	fil_space_t* space = fil_space_get_by_id(space_id);
-	fil_system_exit();
-
 	/* Let's not compress file space header or
 	extent descriptor */
-	if (orig_page_type == 0 ||
-	    orig_page_type == FIL_PAGE_TYPE_FSP_HDR ||
-	    orig_page_type == FIL_PAGE_TYPE_XDES ||
-		orig_page_type == FIL_PAGE_PAGE_COMPRESSED) {
+	switch (fil_page_get_type(buf)) {
+	case 0:
+	case FIL_PAGE_TYPE_FSP_HDR:
+	case FIL_PAGE_TYPE_XDES:
+	case FIL_PAGE_PAGE_COMPRESSED:
 		*out_len = len;
-
 		goto err_exit;
 	}
 
@@ -157,11 +152,11 @@ fil_compress_page(
 		comp_level = page_zip_level;
 	}
 
-#ifdef UNIV_PAGECOMPRESS_DEBUG
-	ib_logf(IB_LOG_LEVEL_INFO,
-		"Preparing for compress for space %lu name %s len %lu.",
-		space_id, fil_space_name(space), len);
-#endif /* UNIV_PAGECOMPRESS_DEBUG */
+	DBUG_PRINT("compress",
+		   ("Preparing for space " ULINTPF " '%s' len " ULINTPF,
+		    space ? space->id : 0,
+		    space ? space->name : "(import)",
+		    len));
 
 	write_size = UNIV_PAGE_SIZE - header_len;
 
@@ -306,10 +301,13 @@ fil_compress_page(
 		if (err != Z_OK) {
 			/* If error we leave the actual page as it was */
 
-			if (space->printed_compression_failure == false) {
+			if (space && !space->printed_compression_failure) {
 				ib_logf(IB_LOG_LEVEL_WARN,
-					"Compression failed for space %lu name %s len %lu rt %d write %lu.",
-					space_id, fil_space_name(space), len, err, write_size);
+					"Compression failed for space "
+					ULINTPF " name %s len " ULINTPF
+					" rt %d write " ULINTPF ".",
+					space->id, space->name, len, err,
+					write_size);
 				space->printed_compression_failure = true;
 			}
 
@@ -367,9 +365,8 @@ fil_compress_page(
 
 		fil_decompress_page(uncomp_page, comp_page, ulong(len), NULL);
 
-		if(buf_page_is_corrupted(false, uncomp_page, 0, space)) {
-			buf_page_print(uncomp_page, 0, BUF_PAGE_PRINT_NO_CRASH);
-			ut_error;
+		if (buf_page_is_corrupted(false, uncomp_page, 0, space)) {
+			buf_page_print(uncomp_page, 0, 0);
 		}
 
 		ut_free(comp_page);
@@ -397,11 +394,12 @@ fil_compress_page(
 #endif
 	}
 
-#ifdef UNIV_PAGECOMPRESS_DEBUG
-	ib_logf(IB_LOG_LEVEL_INFO,
-		"Compression succeeded for space %lu name %s len %lu out_len %lu.",
-		space_id, fil_space_name(space), len, write_size);
-#endif /* UNIV_PAGECOMPRESS_DEBUG */
+	DBUG_PRINT("compress",
+		   ("Succeeded for space " ULINTPF
+		    " '%s' len " ULINTPF " out_len " ULINTPF,
+		    space ? space->id : 0,
+		    space ? space->name : "(import)",
+		    len, write_size));
 
 	srv_stats.page_compression_saved.add((len - write_size));
 	srv_stats.pages_page_compressed.inc();
diff --git a/storage/xtradb/include/buf0buf.h b/storage/xtradb/include/buf0buf.h
index 1774d9445ff..4a632e2345f 100644
--- a/storage/xtradb/include/buf0buf.h
+++ b/storage/xtradb/include/buf0buf.h
@@ -1534,17 +1534,19 @@ buf_own_zip_mutex_for_page(
 	MY_ATTRIBUTE((nonnull,warn_unused_result));
 #endif /* UNIV_DEBUG */
 
-/********************************************************************//**
-The hook that is called just before a page is written to disk.
-The function encrypts the content of the page and returns a pointer
-to a frame that will be written instead of the real frame. */
+/** Encryption and page_compression hook that is called just before
+a page is written to disk.
+@param[in,out]	space		tablespace
+@param[in,out]	bpage		buffer page
+@param[in]	src_frame	physical page frame that is being encrypted
+@return	page frame to be written to file
+(may be src_frame or an encrypted/compressed copy of it) */
 UNIV_INTERN
 byte*
 buf_page_encrypt_before_write(
-/*==========================*/
-	buf_page_t*	page,		/*!< in/out: buffer page to be flushed */
-	byte*		frame,		/*!< in: src frame */
-	ulint		space_id);	/*!< in: space id */
+	fil_space_t*	space,
+	buf_page_t*	bpage,
+	byte*		src_frame);
 
 /**********************************************************************
 The hook that is called after page is written to disk.
diff --git a/storage/xtradb/include/fil0fil.h b/storage/xtradb/include/fil0fil.h
index 698039afede..fe7cc60d1e4 100644
--- a/storage/xtradb/include/fil0fil.h
+++ b/storage/xtradb/include/fil0fil.h
@@ -1120,16 +1120,13 @@ _fil_io(
 #define fil_io(type, sync, space_id, zip_size, block_offset, byte_offset, len, buf, message, write_size) \
 	_fil_io(type, sync, space_id, zip_size, block_offset, byte_offset, len, buf, message, write_size, NULL)
 
-/*******************************************************************//**
-Returns the block size of the file space
+/** Determine the block size of the data file.
+@param[in]	space		tablespace
+@param[in]	offset		page number
 @return	block size */
 UNIV_INTERN
 ulint
-fil_space_get_block_size(
-/*=====================*/
-	ulint	id,	/*!< in: space id */
-	ulint   offset, /*!< in: page offset */
-	ulint   len);	/*!< in: page len */
+fil_space_get_block_size(const fil_space_t* space, unsigned offset);
 
 /**********************************************************************//**
 Waits for an aio operation to complete. This function is used to write the
@@ -1151,14 +1148,18 @@ fil_flush(
 /*======*/
 	ulint	space_id);	/*!< in: file space id (this can be a group of
 				log files or a tablespace of the database) */
-/**********************************************************************//**
-Flushes to disk writes in file spaces of the given type possibly cached by
-the OS. */
+/** Flush a tablespace.
+@param[in,out]	space	tablespace to flush */
 UNIV_INTERN
 void
-fil_flush_file_spaces(
-/*==================*/
-	ulint	purpose);	/*!< in: FIL_TABLESPACE, FIL_LOG */
+fil_flush(fil_space_t* space);
+
+/** Flush to disk the writes in file spaces of the given type
+possibly cached by the OS.
+@param[in]	purpose	FIL_TYPE_TABLESPACE or FIL_TYPE_LOG */
+UNIV_INTERN
+void
+fil_flush_file_spaces(ulint purpose);
 /******************************************************************//**
 Checks the consistency of the tablespace cache.
 @return	TRUE if ok */
diff --git a/storage/xtradb/include/fil0pagecompress.h b/storage/xtradb/include/fil0pagecompress.h
index 1fe5cb66bf6..73667c5420e 100644
--- a/storage/xtradb/include/fil0pagecompress.h
+++ b/storage/xtradb/include/fil0pagecompress.h
@@ -31,33 +31,6 @@ Created 11/12/2013 Jan Lindström jan.lindstrom@skysql.com
 ***********************************************************************/
 
 /*******************************************************************//**
-Returns the page compression level flag of the space, or 0 if the space
-is not compressed. The tablespace must be cached in the memory cache.
-@return	page compression level if page compressed, ULINT_UNDEFINED if space not found */
-UNIV_INLINE
-ulint
-fil_space_get_page_compression_level(
-/*=================================*/
-	ulint	id);	/*!< in: space id */
-/*******************************************************************//**
-Returns the page compression flag of the space, or false if the space
-is not compressed. The tablespace must be cached in the memory cache.
-@return	true if page compressed, false if not or space not found */
-UNIV_INLINE
-bool
-fil_space_is_page_compressed(
-/*=========================*/
-	ulint	id);	/*!< in: space id */
-/*******************************************************************//**
-Returns the atomic writes flag of the space, or false if the space
-is not using atomic writes. The tablespace must be cached in the memory cache.
-@return	atomic write table option value */
-UNIV_INLINE
-atomic_writes_t
-fil_space_get_atomic_writes(
-/*=========================*/
-	ulint	id);	/*!< in: space id */
-/*******************************************************************//**
 Find out wheather the page is index page or not
 @return	true if page type index page, false if not */
 UNIV_INLINE
@@ -84,8 +57,7 @@ UNIV_INTERN
 byte*
 fil_compress_page(
 /*==============*/
-	ulint	space_id,	/*!< in: tablespace id of the
-				table. */
+	fil_space_t*	space,	/*!< in,out: tablespace (NULL during IMPORT) */
 	byte*	buf,		/*!< in: buffer from which to write; in aio
 				this must be appropriately aligned */
 	byte*	out_buf,	/*!< out: compressed buffer */
diff --git a/storage/xtradb/include/fsp0pagecompress.ic b/storage/xtradb/include/fsp0pagecompress.ic
index 48163277feb..14f968e319e 100644
--- a/storage/xtradb/include/fsp0pagecompress.ic
+++ b/storage/xtradb/include/fsp0pagecompress.ic
@@ -85,47 +85,6 @@ fil_page_is_compressed_encrypted(
 	return(mach_read_from_2(buf+FIL_PAGE_TYPE) == FIL_PAGE_PAGE_COMPRESSED_ENCRYPTED);
 }
 
-#ifndef UNIV_INNOCHECKSUM
-/*******************************************************************//**
-Returns the page compression level of the space, or 0 if the space
-is not compressed. The tablespace must be cached in the memory cache.
-@return	page compression level, 0 if space not found */
-UNIV_INLINE
-ulint
-fil_space_get_page_compression_level(
-/*=================================*/
-	ulint	id)	/*!< in: space id */
-{
-	ulint	flags;
-
-	flags = fil_space_get_flags(id);
-
-	if (flags && flags != ULINT_UNDEFINED) {
-
-		return(fsp_flags_get_page_compression_level(flags));
-	}
-
-	return(0);
-}
-
-/*******************************************************************//**
-Extract the page compression from space.
-@return true if space is page compressed, false if space is not found
-or space is not page compressed. */
-UNIV_INLINE
-bool
-fil_space_is_page_compressed(
-/*=========================*/
-	ulint	id)	/*!< in: space id */
-{
-	ulint	flags = fil_space_get_flags(id);
-
-	return(flags != ULINT_UNDEFINED
-	       && FSP_FLAGS_HAS_PAGE_COMPRESSION(flags));
-}
-
-#endif /* UNIV_INNOCHECKSUM */
-
 /****************************************************************//**
 Get the name of the compression algorithm used for page
 compression.
@@ -166,28 +125,6 @@ fil_get_compression_alg_name(
 
 #ifndef UNIV_INNOCHECKSUM
 /*******************************************************************//**
-Returns the atomic writes flag of the space, or false if the space
-is not using atomic writes. The tablespace must be cached in the memory cache.
-@return	atomic writes table option value */
-UNIV_INLINE
-atomic_writes_t
-fil_space_get_atomic_writes(
-/*========================*/
-	ulint	id)	/*!< in: space id */
-{
-	ulint	flags;
-
-	flags = fil_space_get_flags(id);
-
-	if (flags && flags != ULINT_UNDEFINED) {
-
-		return((atomic_writes_t)fsp_flags_get_atomic_writes(flags));
-	}
-
-	return((atomic_writes_t)0);
-}
-
-/*******************************************************************//**
 Find out wheather the page is page compressed with lzo method
 @return	true if page is page compressed with lzo method, false if not */
 UNIV_INLINE