diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 766d152..64c63c2 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -100,6 +100,19 @@ static const int btrfs_csum_sizes[] = { 4 };
 
 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
 
+/*
+ * Type based metadata reserve type
+ * This affects how btrfs reserve metadata space for buffered write.
+ *
+ * This is caused by the different max extent size for normal COW
+ * and compression, and further in-band dedupe
+ */
+enum btrfs_metadata_reserve_type {
+	BTRFS_RESERVE_NORMAL,
+};
+
+u64 btrfs_max_extent_size(enum btrfs_metadata_reserve_type reserve_type);
+
 struct btrfs_mapping_tree {
 	struct extent_map_tree map_tree;
 };
@@ -2693,10 +2706,14 @@ int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
 void btrfs_subvolume_release_metadata(struct btrfs_root *root,
 				      struct btrfs_block_rsv *rsv,
 				      u64 qgroup_reserved);
-int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
-void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
-int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len);
-void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len);
+int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes,
+			enum btrfs_metadata_reserve_type reserve_type);
+void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes,
+			enum btrfs_metadata_reserve_type reserve_type);
+int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len,
+			enum btrfs_metadata_reserve_type reserve_type);
+void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len,
+			enum btrfs_metadata_reserve_type reserve_type);
 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
 					      unsigned short type);
@@ -3138,9 +3155,11 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
 			       int nr);
 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
-			      struct extent_state **cached_state, int dedupe);
+			      struct extent_state **cached_state,
+			      enum btrfs_metadata_reserve_type reserve_type);
 int btrfs_set_extent_defrag(struct inode *inode, u64 start, u64 end,
-			    struct extent_state **cached_state);
+			    struct extent_state **cached_state,
+			    enum btrfs_metadata_reserve_type reserve_type);
 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
 			     struct btrfs_root *new_root,
 			     struct btrfs_root *parent_root,
@@ -3233,7 +3252,8 @@ int btrfs_release_file(struct inode *inode, struct file *file);
 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
 		      struct page **pages, size_t num_pages,
 		      loff_t pos, size_t write_bytes,
-		      struct extent_state **cached);
+		      struct extent_state **cached,
+		      enum btrfs_metadata_reserve_type reserve_type);
 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
 ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in,
 			      struct file *file_out, loff_t pos_out,
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 4607af3..bd99f25 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -5841,15 +5841,16 @@ void btrfs_subvolume_release_metadata(struct btrfs_root *root,
  * reserved extents that need to be freed.  This must be called with
  * BTRFS_I(inode)->lock held.
  */
-static unsigned drop_outstanding_extent(struct inode *inode, u64 num_bytes)
+static unsigned drop_outstanding_extent(struct inode *inode, u64 num_bytes,
+				enum btrfs_metadata_reserve_type reserve_type)
 {
 	unsigned drop_inode_space = 0;
 	unsigned dropped_extents = 0;
 	unsigned num_extents = 0;
+	u64 max_extent_size = btrfs_max_extent_size(reserve_type);
 
-	num_extents = (unsigned)div64_u64(num_bytes +
-					  BTRFS_MAX_EXTENT_SIZE - 1,
-					  BTRFS_MAX_EXTENT_SIZE);
+	num_extents = (unsigned)div64_u64(num_bytes + max_extent_size - 1,
+					  max_extent_size);
 	ASSERT(num_extents);
 	ASSERT(BTRFS_I(inode)->outstanding_extents >= num_extents);
 	BTRFS_I(inode)->outstanding_extents -= num_extents;
@@ -5919,7 +5920,17 @@ static u64 calc_csum_metadata_size(struct inode *inode, u64 num_bytes,
 	return btrfs_calc_trans_metadata_size(root, old_csums - num_csums);
 }
 
-int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
+u64 btrfs_max_extent_size(enum btrfs_metadata_reserve_type reserve_type)
+{
+	if (reserve_type == BTRFS_RESERVE_NORMAL)
+		return BTRFS_MAX_EXTENT_SIZE;
+
+	ASSERT(0);
+	return BTRFS_MAX_EXTENT_SIZE;
+}
+
+int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes,
+			enum btrfs_metadata_reserve_type reserve_type)
 {
 	struct btrfs_root *root = BTRFS_I(inode)->root;
 	struct btrfs_block_rsv *block_rsv = &root->fs_info->delalloc_block_rsv;
@@ -5930,6 +5941,7 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
 	int ret = 0;
 	bool delalloc_lock = true;
 	u64 to_free = 0;
+	u64 max_extent_size = btrfs_max_extent_size(reserve_type);
 	unsigned dropped;
 	bool release_extra = false;
 
@@ -5958,9 +5970,8 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
 	num_bytes = ALIGN(num_bytes, root->sectorsize);
 
 	spin_lock(&BTRFS_I(inode)->lock);
-	nr_extents = (unsigned)div64_u64(num_bytes +
-					 BTRFS_MAX_EXTENT_SIZE - 1,
-					 BTRFS_MAX_EXTENT_SIZE);
+	nr_extents = (unsigned)div64_u64(num_bytes + max_extent_size - 1,
+					 max_extent_size);
 	BTRFS_I(inode)->outstanding_extents += nr_extents;
 
 	nr_extents = 0;
@@ -6011,7 +6022,7 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
 
 out_fail:
 	spin_lock(&BTRFS_I(inode)->lock);
-	dropped = drop_outstanding_extent(inode, num_bytes);
+	dropped = drop_outstanding_extent(inode, num_bytes, reserve_type);
 	/*
 	 * If the inodes csum_bytes is the same as the original
 	 * csum_bytes then we know we haven't raced with any free()ers
@@ -6077,12 +6088,15 @@ out_fail:
  * btrfs_delalloc_release_metadata - release a metadata reservation for an inode
  * @inode: the inode to release the reservation for
  * @num_bytes: the number of bytes we're releasing
+ * @reserve_type: the type when we reserve delalloc space for this range.
+ *                must be the same passed to btrfs_delalloc_reserve_metadata()
  *
  * This will release the metadata reservation for an inode.  This can be called
  * once we complete IO for a given set of bytes to release their metadata
  * reservations.
  */
-void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes)
+void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes,
+			enum btrfs_metadata_reserve_type reserve_type)
 {
 	struct btrfs_root *root = BTRFS_I(inode)->root;
 	u64 to_free = 0;
@@ -6090,7 +6104,7 @@ void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes)
 
 	num_bytes = ALIGN(num_bytes, root->sectorsize);
 	spin_lock(&BTRFS_I(inode)->lock);
-	dropped = drop_outstanding_extent(inode, num_bytes);
+	dropped = drop_outstanding_extent(inode, num_bytes, reserve_type);
 
 	if (num_bytes)
 		to_free = calc_csum_metadata_size(inode, num_bytes, 0);
@@ -6114,6 +6128,8 @@ void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes)
  * @inode: inode we're writing to
  * @start: start range we are writing to
  * @len: how long the range we are writing to
+ * @reserve_type: the type of write we're reserving for.
+ *		  determine the max extent size.
  *
  * This will do the following things
  *
@@ -6131,14 +6147,15 @@ void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes)
  * Return 0 for success
  * Return <0 for error(-ENOSPC or -EQUOT)
  */
-int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len)
+int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len,
+				 enum btrfs_metadata_reserve_type reserve_type)
 {
 	int ret;
 
 	ret = btrfs_check_data_free_space(inode, start, len);
 	if (ret < 0)
 		return ret;
-	ret = btrfs_delalloc_reserve_metadata(inode, len);
+	ret = btrfs_delalloc_reserve_metadata(inode, len, reserve_type);
 	if (ret < 0)
 		btrfs_free_reserved_data_space(inode, start, len);
 	return ret;
@@ -6149,6 +6166,8 @@ int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len)
  * @inode: inode we're releasing space for
  * @start: start position of the space already reserved
  * @len: the len of the space already reserved
+ * @reserve_type: the type of write we're releasing for
+ *		  must match the type passed to btrfs_delalloc_reserve_space()
  *
  * This must be matched with a call to btrfs_delalloc_reserve_space.  This is
  * called in the case that we don't need the metadata AND data reservations
@@ -6159,9 +6178,10 @@ int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len)
  * list if there are no delalloc bytes left.
  * Also it will handle the qgroup reserved space.
  */
-void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len)
+void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len,
+			enum btrfs_metadata_reserve_type reserve_type)
 {
-	btrfs_delalloc_release_metadata(inode, len);
+	btrfs_delalloc_release_metadata(inode, len, reserve_type);
 	btrfs_free_reserved_data_space(inode, start, len);
 }
 
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 72a180d..f174381 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -488,7 +488,8 @@ static void btrfs_drop_pages(struct page **pages, size_t num_pages)
 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
 			     struct page **pages, size_t num_pages,
 			     loff_t pos, size_t write_bytes,
-			     struct extent_state **cached)
+			     struct extent_state **cached,
+			     enum btrfs_metadata_reserve_type reserve_type)
 {
 	int err = 0;
 	int i;
@@ -503,7 +504,7 @@ int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
 
 	end_of_last_block = start_pos + num_bytes - 1;
 	err = btrfs_set_extent_delalloc(inode, start_pos, end_of_last_block,
-					cached, 0);
+					cached, reserve_type);
 	if (err)
 		return err;
 
@@ -1521,6 +1522,7 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
 	bool only_release_metadata = false;
 	bool force_page_uptodate = false;
 	bool need_unlock;
+	enum btrfs_metadata_reserve_type reserve_type = BTRFS_RESERVE_NORMAL;
 
 	nrptrs = min(DIV_ROUND_UP(iov_iter_count(i), PAGE_SIZE),
 			PAGE_SIZE / (sizeof(struct page *)));
@@ -1583,7 +1585,8 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
 			}
 		}
 
-		ret = btrfs_delalloc_reserve_metadata(inode, reserve_bytes);
+		ret = btrfs_delalloc_reserve_metadata(inode, reserve_bytes,
+						      reserve_type);
 		if (ret) {
 			if (!only_release_metadata)
 				btrfs_free_reserved_data_space(inode, pos,
@@ -1666,14 +1669,16 @@ again:
 			}
 			if (only_release_metadata) {
 				btrfs_delalloc_release_metadata(inode,
-								release_bytes);
+								release_bytes,
+								reserve_type);
 			} else {
 				u64 __pos;
 
 				__pos = round_down(pos, root->sectorsize) +
 					(dirty_pages << PAGE_SHIFT);
 				btrfs_delalloc_release_space(inode, __pos,
-							     release_bytes);
+							     release_bytes,
+							     reserve_type);
 			}
 		}
 
@@ -1683,7 +1688,7 @@ again:
 		if (copied > 0)
 			ret = btrfs_dirty_pages(root, inode, pages,
 						dirty_pages, pos, copied,
-						NULL);
+						NULL, reserve_type);
 		if (need_unlock)
 			unlock_extent_cached(&BTRFS_I(inode)->io_tree,
 					     lockstart, lockend, &cached_state,
@@ -1724,11 +1729,12 @@ again:
 	if (release_bytes) {
 		if (only_release_metadata) {
 			btrfs_end_write_no_snapshoting(root);
-			btrfs_delalloc_release_metadata(inode, release_bytes);
+			btrfs_delalloc_release_metadata(inode, release_bytes,
+							reserve_type);
 		} else {
 			btrfs_delalloc_release_space(inode,
 						round_down(pos, root->sectorsize),
-						release_bytes);
+						release_bytes, reserve_type);
 		}
 	}
 
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index e4b48f3..1e433f7 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -1297,7 +1297,8 @@ static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
 
 	/* Everything is written out, now we dirty the pages in the file. */
 	ret = btrfs_dirty_pages(root, inode, io_ctl->pages, io_ctl->num_pages,
-				0, i_size_read(inode), &cached_state);
+				0, i_size_read(inode), &cached_state,
+				BTRFS_RESERVE_NORMAL);
 	if (ret)
 		goto out_nospc;
 
@@ -3536,7 +3537,8 @@ int btrfs_write_out_ino_cache(struct btrfs_root *root,
 
 	if (ret) {
 		if (release_metadata)
-			btrfs_delalloc_release_metadata(inode, inode->i_size);
+			btrfs_delalloc_release_metadata(inode, inode->i_size,
+							BTRFS_RESERVE_NORMAL);
 #ifdef DEBUG
 		btrfs_err(root->fs_info,
 			"failed to write free ino cache for root %llu",
diff --git a/fs/btrfs/inode-map.c b/fs/btrfs/inode-map.c
index d27014b..0335862 100644
--- a/fs/btrfs/inode-map.c
+++ b/fs/btrfs/inode-map.c
@@ -491,14 +491,16 @@ again:
 	/* Just to make sure we have enough space */
 	prealloc += 8 * PAGE_SIZE;
 
-	ret = btrfs_delalloc_reserve_space(inode, 0, prealloc);
+	ret = btrfs_delalloc_reserve_space(inode, 0, prealloc,
+					   BTRFS_RESERVE_NORMAL);
 	if (ret)
 		goto out_put;
 
 	ret = btrfs_prealloc_file_range_trans(inode, trans, 0, 0, prealloc,
 					      prealloc, prealloc, &alloc_hint);
 	if (ret) {
-		btrfs_delalloc_release_metadata(inode, prealloc);
+		btrfs_delalloc_release_metadata(inode, prealloc,
+						BTRFS_RESERVE_NORMAL);
 		goto out_put;
 	}
 
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 25e0083..906ab27 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -315,7 +315,8 @@ static noinline int cow_file_range_inline(struct btrfs_root *root,
 	}
 
 	set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &BTRFS_I(inode)->runtime_flags);
-	btrfs_delalloc_release_metadata(inode, end + 1 - start);
+	btrfs_delalloc_release_metadata(inode, end + 1 - start,
+					BTRFS_RESERVE_NORMAL);
 	btrfs_drop_extent_cache(inode, start, aligned_end - 1, 0);
 out:
 	/*
@@ -1596,6 +1597,8 @@ static void btrfs_split_extent_hook(struct inode *inode,
 				    struct extent_state *orig, u64 split)
 {
 	u64 size;
+	enum btrfs_metadata_reserve_type reserve_type = BTRFS_RESERVE_NORMAL;
+	u64 max_extent_size;
 
 	/* not delalloc, ignore it */
 	if (!(orig->state & EXTENT_DELALLOC))
@@ -1604,8 +1607,10 @@ static void btrfs_split_extent_hook(struct inode *inode,
 	if (btrfs_is_free_space_inode(inode))
 		return;
 
+	max_extent_size = btrfs_max_extent_size(reserve_type);
+
 	size = orig->end - orig->start + 1;
-	if (size > BTRFS_MAX_EXTENT_SIZE) {
+	if (size > max_extent_size) {
 		u64 num_extents;
 		u64 new_size;
 
@@ -1614,13 +1619,13 @@ static void btrfs_split_extent_hook(struct inode *inode,
 		 * applies here, just in reverse.
 		 */
 		new_size = orig->end - split + 1;
-		num_extents = div64_u64(new_size + BTRFS_MAX_EXTENT_SIZE - 1,
-					BTRFS_MAX_EXTENT_SIZE);
+		num_extents = div64_u64(new_size + max_extent_size - 1,
+					max_extent_size);
 		new_size = split - orig->start;
-		num_extents += div64_u64(new_size + BTRFS_MAX_EXTENT_SIZE - 1,
-					BTRFS_MAX_EXTENT_SIZE);
-		if (div64_u64(size + BTRFS_MAX_EXTENT_SIZE - 1,
-			      BTRFS_MAX_EXTENT_SIZE) >= num_extents)
+		num_extents += div64_u64(new_size + max_extent_size - 1,
+					 max_extent_size);
+		if (div64_u64(size + max_extent_size - 1,
+			      max_extent_size) >= num_extents)
 			return;
 	}
 
@@ -1641,6 +1646,8 @@ static void btrfs_merge_extent_hook(struct inode *inode,
 {
 	u64 new_size, old_size;
 	u64 num_extents;
+	enum btrfs_metadata_reserve_type reserve_type = BTRFS_RESERVE_NORMAL;
+	u64 max_extent_size;
 
 	/* not delalloc, ignore it */
 	if (!(other->state & EXTENT_DELALLOC))
@@ -1649,13 +1656,15 @@ static void btrfs_merge_extent_hook(struct inode *inode,
 	if (btrfs_is_free_space_inode(inode))
 		return;
 
+	max_extent_size = btrfs_max_extent_size(reserve_type);
+
 	if (new->start > other->start)
 		new_size = new->end - other->start + 1;
 	else
 		new_size = other->end - new->start + 1;
 
 	/* we're not bigger than the max, unreserve the space and go */
-	if (new_size <= BTRFS_MAX_EXTENT_SIZE) {
+	if (new_size <= max_extent_size) {
 		spin_lock(&BTRFS_I(inode)->lock);
 		BTRFS_I(inode)->outstanding_extents--;
 		spin_unlock(&BTRFS_I(inode)->lock);
@@ -1681,14 +1690,14 @@ static void btrfs_merge_extent_hook(struct inode *inode,
 	 * this case.
 	 */
 	old_size = other->end - other->start + 1;
-	num_extents = div64_u64(old_size + BTRFS_MAX_EXTENT_SIZE - 1,
-				BTRFS_MAX_EXTENT_SIZE);
+	num_extents = div64_u64(old_size + max_extent_size - 1,
+				max_extent_size);
 	old_size = new->end - new->start + 1;
-	num_extents += div64_u64(old_size + BTRFS_MAX_EXTENT_SIZE - 1,
-				 BTRFS_MAX_EXTENT_SIZE);
+	num_extents += div64_u64(old_size + max_extent_size - 1,
+				 max_extent_size);
 
-	if (div64_u64(new_size + BTRFS_MAX_EXTENT_SIZE - 1,
-		      BTRFS_MAX_EXTENT_SIZE) >= num_extents)
+	if (div64_u64(new_size + max_extent_size - 1,
+		      max_extent_size) >= num_extents)
 		return;
 
 	spin_lock(&BTRFS_I(inode)->lock);
@@ -1754,10 +1763,16 @@ static void btrfs_set_bit_hook(struct inode *inode,
 	if (!(state->state & EXTENT_DELALLOC) && (*bits & EXTENT_DELALLOC)) {
 		struct btrfs_root *root = BTRFS_I(inode)->root;
 		u64 len = state->end + 1 - state->start;
-		u64 num_extents = div64_u64(len + BTRFS_MAX_EXTENT_SIZE - 1,
-					    BTRFS_MAX_EXTENT_SIZE);
+		enum btrfs_metadata_reserve_type reserve_type =
+					BTRFS_RESERVE_NORMAL;
+		u64 max_extent_size;
+		u64 num_extents;
 		bool do_list = !btrfs_is_free_space_inode(inode);
 
+		max_extent_size = btrfs_max_extent_size(reserve_type);
+		num_extents = div64_u64(len + max_extent_size - 1,
+					max_extent_size);
+
 		if (*bits & EXTENT_FIRST_DELALLOC)
 			*bits &= ~EXTENT_FIRST_DELALLOC;
 
@@ -1792,8 +1807,9 @@ static void btrfs_clear_bit_hook(struct inode *inode,
 				 unsigned *bits)
 {
 	u64 len = state->end + 1 - state->start;
-	u64 num_extents = div64_u64(len + BTRFS_MAX_EXTENT_SIZE -1,
-				    BTRFS_MAX_EXTENT_SIZE);
+	u64 max_extent_size;
+	u64 num_extents;
+	enum btrfs_metadata_reserve_type reserve_type = BTRFS_RESERVE_NORMAL;
 
 	spin_lock(&BTRFS_I(inode)->lock);
 	if ((state->state & EXTENT_DEFRAG) && (*bits & EXTENT_DEFRAG))
@@ -1809,6 +1825,10 @@ static void btrfs_clear_bit_hook(struct inode *inode,
 		struct btrfs_root *root = BTRFS_I(inode)->root;
 		bool do_list = !btrfs_is_free_space_inode(inode);
 
+		max_extent_size = btrfs_max_extent_size(reserve_type);
+		num_extents = div64_u64(len + max_extent_size - 1,
+					max_extent_size);
+
 		if (*bits & EXTENT_FIRST_DELALLOC) {
 			*bits &= ~EXTENT_FIRST_DELALLOC;
 		} else if (!(*bits & EXTENT_DO_ACCOUNTING) && do_list) {
@@ -1824,7 +1844,8 @@ static void btrfs_clear_bit_hook(struct inode *inode,
 		 */
 		if (*bits & EXTENT_DO_ACCOUNTING &&
 		    root != root->fs_info->tree_root)
-			btrfs_delalloc_release_metadata(inode, len);
+			btrfs_delalloc_release_metadata(inode, len,
+							reserve_type);
 
 		/* For sanity tests. */
 		if (btrfs_is_testing(root->fs_info))
@@ -2007,11 +2028,13 @@ static noinline int add_pending_csums(struct btrfs_trans_handle *trans,
 }
 
 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
-			      struct extent_state **cached_state, int dedupe)
+			      struct extent_state **cached_state,
+			      enum btrfs_metadata_reserve_type reserve_type)
 {
 	int ret;
-	u64 num_extents = div64_u64(end - start + BTRFS_MAX_EXTENT_SIZE,
-				    BTRFS_MAX_EXTENT_SIZE);
+	u64 max_extent_size = btrfs_max_extent_size(reserve_type);
+	u64 num_extents = div64_u64(end - start + max_extent_size,
+				    max_extent_size);
 
 	WARN_ON((end & (PAGE_SIZE - 1)) == 0);
 	ret = set_extent_delalloc(&BTRFS_I(inode)->io_tree, start, end,
@@ -2038,11 +2061,13 @@ int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
 }
 
 int btrfs_set_extent_defrag(struct inode *inode, u64 start, u64 end,
-			    struct extent_state **cached_state)
+			    struct extent_state **cached_state,
+			    enum btrfs_metadata_reserve_type reserve_type)
 {
 	int ret;
-	u64 num_extents = div64_u64(end - start + BTRFS_MAX_EXTENT_SIZE,
-				    BTRFS_MAX_EXTENT_SIZE);
+	u64 max_extent_size = btrfs_max_extent_size(reserve_type);
+	u64 num_extents = div64_u64(end - start + max_extent_size,
+				    max_extent_size);
 
 	WARN_ON((end & (PAGE_SIZE - 1)) == 0);
 	ret = set_extent_defrag(&BTRFS_I(inode)->io_tree, start, end,
@@ -2073,6 +2098,7 @@ static void btrfs_writepage_fixup_worker(struct btrfs_work *work)
 	u64 page_start;
 	u64 page_end;
 	int ret;
+	enum btrfs_metadata_reserve_type reserve_type = BTRFS_RESERVE_NORMAL;
 
 	fixup = container_of(work, struct btrfs_writepage_fixup, work);
 	page = fixup->page;
@@ -2106,7 +2132,7 @@ again:
 	}
 
 	ret = btrfs_delalloc_reserve_space(inode, page_start,
-					   PAGE_SIZE);
+					   PAGE_SIZE, reserve_type);
 	if (ret) {
 		mapping_set_error(page->mapping, ret);
 		end_extent_writepage(page, ret, page_start, page_end);
@@ -2115,7 +2141,7 @@ again:
 	 }
 
 	btrfs_set_extent_delalloc(inode, page_start, page_end, &cached_state,
-				  0);
+				  reserve_type);
 	ClearPageChecked(page);
 	set_page_dirty(page);
 out:
@@ -2925,6 +2951,7 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent)
 	u64 logical_len = ordered_extent->len;
 	bool nolock;
 	bool truncated = false;
+	enum btrfs_metadata_reserve_type reserve_type = BTRFS_RESERVE_NORMAL;
 
 	nolock = btrfs_is_free_space_inode(inode);
 
@@ -3048,7 +3075,8 @@ out_unlock:
 			     ordered_extent->len - 1, &cached_state, GFP_NOFS);
 out:
 	if (root != root->fs_info->tree_root)
-		btrfs_delalloc_release_metadata(inode, ordered_extent->len);
+		btrfs_delalloc_release_metadata(inode, ordered_extent->len,
+						reserve_type);
 	if (trans)
 		btrfs_end_transaction(trans, root);
 
@@ -4762,13 +4790,14 @@ int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
 	int ret = 0;
 	u64 block_start;
 	u64 block_end;
+	enum btrfs_metadata_reserve_type reserve_type = BTRFS_RESERVE_NORMAL;
 
 	if ((offset & (blocksize - 1)) == 0 &&
 	    (!len || ((len & (blocksize - 1)) == 0)))
 		goto out;
 
 	ret = btrfs_delalloc_reserve_space(inode,
-			round_down(from, blocksize), blocksize);
+			round_down(from, blocksize), blocksize, reserve_type);
 	if (ret)
 		goto out;
 
@@ -4777,7 +4806,7 @@ again:
 	if (!page) {
 		btrfs_delalloc_release_space(inode,
 				round_down(from, blocksize),
-				blocksize);
+				blocksize, reserve_type);
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -4820,7 +4849,7 @@ again:
 			  0, 0, &cached_state, GFP_NOFS);
 
 	ret = btrfs_set_extent_delalloc(inode, block_start, block_end,
-					&cached_state, 0);
+					&cached_state, reserve_type);
 	if (ret) {
 		unlock_extent_cached(io_tree, block_start, block_end,
 				     &cached_state, GFP_NOFS);
@@ -4848,7 +4877,7 @@ again:
 out_unlock:
 	if (ret)
 		btrfs_delalloc_release_space(inode, block_start,
-					     blocksize);
+					     blocksize, reserve_type);
 	unlock_page(page);
 	put_page(page);
 out:
@@ -8743,7 +8772,8 @@ static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 			inode_unlock(inode);
 			relock = true;
 		}
-		ret = btrfs_delalloc_reserve_space(inode, offset, count);
+		ret = btrfs_delalloc_reserve_space(inode, offset, count,
+						   BTRFS_RESERVE_NORMAL);
 		if (ret)
 			goto out;
 		dio_data.outstanding_extents = div64_u64(count +
@@ -8775,7 +8805,7 @@ static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 		if (ret < 0 && ret != -EIOCBQUEUED) {
 			if (dio_data.reserve)
 				btrfs_delalloc_release_space(inode, offset,
-							     dio_data.reserve);
+					dio_data.reserve, BTRFS_RESERVE_NORMAL);
 			/*
 			 * On error we might have left some ordered extents
 			 * without submitting corresponding bios for them, so
@@ -8791,7 +8821,8 @@ static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 					0);
 		} else if (ret >= 0 && (size_t)ret < count)
 			btrfs_delalloc_release_space(inode, offset,
-						     count - (size_t)ret);
+						     count - (size_t)ret,
+						     BTRFS_RESERVE_NORMAL);
 	}
 out:
 	if (wakeup)
@@ -9030,6 +9061,7 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 	struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
 	struct btrfs_ordered_extent *ordered;
 	struct extent_state *cached_state = NULL;
+	enum btrfs_metadata_reserve_type reserve_type = BTRFS_RESERVE_NORMAL;
 	char *kaddr;
 	unsigned long zero_start;
 	loff_t size;
@@ -9056,7 +9088,7 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 	 * being processed by btrfs_page_mkwrite() function.
 	 */
 	ret = btrfs_delalloc_reserve_space(inode, page_start,
-					   reserved_space);
+					   reserved_space, reserve_type);
 	if (!ret) {
 		ret = file_update_time(vma->vm_file);
 		reserved = 1;
@@ -9108,7 +9140,8 @@ again:
 			BTRFS_I(inode)->outstanding_extents++;
 			spin_unlock(&BTRFS_I(inode)->lock);
 			btrfs_delalloc_release_space(inode, page_start,
-						PAGE_SIZE - reserved_space);
+						PAGE_SIZE - reserved_space,
+						reserve_type);
 		}
 	}
 
@@ -9125,7 +9158,7 @@ again:
 			  0, 0, &cached_state, GFP_NOFS);
 
 	ret = btrfs_set_extent_delalloc(inode, page_start, end,
-					&cached_state, 0);
+					&cached_state, reserve_type);
 	if (ret) {
 		unlock_extent_cached(io_tree, page_start, page_end,
 				     &cached_state, GFP_NOFS);
@@ -9163,7 +9196,8 @@ out_unlock:
 	}
 	unlock_page(page);
 out:
-	btrfs_delalloc_release_space(inode, page_start, reserved_space);
+	btrfs_delalloc_release_space(inode, page_start, reserved_space,
+				     reserve_type);
 out_noreserve:
 	sb_end_pagefault(inode->i_sb);
 	return ret;
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index eff5eae..870737b 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1131,6 +1131,7 @@ static int cluster_pages_for_defrag(struct inode *inode,
 	struct btrfs_ordered_extent *ordered;
 	struct extent_state *cached_state = NULL;
 	struct extent_io_tree *tree;
+	enum btrfs_metadata_reserve_type reserve_type = BTRFS_RESERVE_NORMAL;
 	gfp_t mask = btrfs_alloc_write_mask(inode->i_mapping);
 
 	file_end = (isize - 1) >> PAGE_SHIFT;
@@ -1141,7 +1142,7 @@ static int cluster_pages_for_defrag(struct inode *inode,
 
 	ret = btrfs_delalloc_reserve_space(inode,
 			start_index << PAGE_SHIFT,
-			page_cnt << PAGE_SHIFT);
+			page_cnt << PAGE_SHIFT, reserve_type);
 	if (ret)
 		return ret;
 	i_done = 0;
@@ -1232,11 +1233,12 @@ again:
 		spin_unlock(&BTRFS_I(inode)->lock);
 		btrfs_delalloc_release_space(inode,
 				start_index << PAGE_SHIFT,
-				(page_cnt - i_done) << PAGE_SHIFT);
+				(page_cnt - i_done) << PAGE_SHIFT,
+				reserve_type);
 	}
 
 	btrfs_set_extent_defrag(inode, page_start,
-				page_end - 1, &cached_state);
+				page_end - 1, &cached_state, reserve_type);
 	unlock_extent_cached(&BTRFS_I(inode)->io_tree,
 			     page_start, page_end - 1, &cached_state,
 			     GFP_NOFS);
@@ -1257,7 +1259,7 @@ out:
 	}
 	btrfs_delalloc_release_space(inode,
 			start_index << PAGE_SHIFT,
-			page_cnt << PAGE_SHIFT);
+			page_cnt << PAGE_SHIFT, reserve_type);
 	return ret;
 
 }
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index c4af0cd..0e4b370 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -3148,6 +3148,7 @@ static int relocate_file_extent_cluster(struct inode *inode,
 	unsigned long last_index;
 	struct page *page;
 	struct file_ra_state *ra;
+	enum btrfs_metadata_reserve_type reserve_type = BTRFS_RESERVE_NORMAL;
 	gfp_t mask = btrfs_alloc_write_mask(inode->i_mapping);
 	int nr = 0;
 	int ret = 0;
@@ -3173,7 +3174,8 @@ static int relocate_file_extent_cluster(struct inode *inode,
 	index = (cluster->start - offset) >> PAGE_SHIFT;
 	last_index = (cluster->end - offset) >> PAGE_SHIFT;
 	while (index <= last_index) {
-		ret = btrfs_delalloc_reserve_metadata(inode, PAGE_SIZE);
+		ret = btrfs_delalloc_reserve_metadata(inode, PAGE_SIZE,
+						      reserve_type);
 		if (ret)
 			goto out;
 
@@ -3186,7 +3188,7 @@ static int relocate_file_extent_cluster(struct inode *inode,
 						   mask);
 			if (!page) {
 				btrfs_delalloc_release_metadata(inode,
-							PAGE_SIZE);
+						PAGE_SIZE, reserve_type);
 				ret = -ENOMEM;
 				goto out;
 			}
@@ -3205,7 +3207,7 @@ static int relocate_file_extent_cluster(struct inode *inode,
 				unlock_page(page);
 				put_page(page);
 				btrfs_delalloc_release_metadata(inode,
-							PAGE_SIZE);
+						PAGE_SIZE, reserve_type);
 				ret = -EIO;
 				goto out;
 			}
@@ -3226,7 +3228,8 @@ static int relocate_file_extent_cluster(struct inode *inode,
 			nr++;
 		}
 
-		btrfs_set_extent_delalloc(inode, page_start, page_end, NULL, 0);
+		btrfs_set_extent_delalloc(inode, page_start, page_end, NULL,
+					  reserve_type);
 		set_page_dirty(page);
 
 		unlock_extent(&BTRFS_I(inode)->io_tree,
diff --git a/fs/btrfs/tests/inode-tests.c b/fs/btrfs/tests/inode-tests.c
index 0bf4680..6edd44d 100644
--- a/fs/btrfs/tests/inode-tests.c
+++ b/fs/btrfs/tests/inode-tests.c
@@ -942,6 +942,7 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 	struct btrfs_fs_info *fs_info = NULL;
 	struct inode *inode = NULL;
 	struct btrfs_root *root = NULL;
+	enum btrfs_metadata_reserve_type reserve_type = BTRFS_RESERVE_NORMAL;
 	int ret = -ENOMEM;
 
 	inode = btrfs_new_test_inode();
@@ -968,7 +969,7 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 	/* [BTRFS_MAX_EXTENT_SIZE] */
 	BTRFS_I(inode)->outstanding_extents++;
 	ret = btrfs_set_extent_delalloc(inode, 0, BTRFS_MAX_EXTENT_SIZE - 1,
-					NULL, 0);
+					NULL, reserve_type);
 	if (ret) {
 		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
 		goto out;
@@ -984,7 +985,7 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 	BTRFS_I(inode)->outstanding_extents++;
 	ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE,
 					BTRFS_MAX_EXTENT_SIZE + sectorsize - 1,
-					NULL, 0);
+					NULL, reserve_type);
 	if (ret) {
 		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
 		goto out;
@@ -1019,7 +1020,7 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 	ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1,
 					(BTRFS_MAX_EXTENT_SIZE >> 1)
 					+ sectorsize - 1,
-					NULL, 0);
+					NULL, reserve_type);
 	if (ret) {
 		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
 		goto out;
@@ -1042,7 +1043,7 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 	ret = btrfs_set_extent_delalloc(inode,
 			BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize,
 			(BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1,
-			NULL, 0);
+			NULL, reserve_type);
 	if (ret) {
 		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
 		goto out;
@@ -1060,7 +1061,8 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 	BTRFS_I(inode)->outstanding_extents++;
 	ret = btrfs_set_extent_delalloc(inode,
 			BTRFS_MAX_EXTENT_SIZE + sectorsize,
-			BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, NULL, 0);
+			BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, NULL,
+			reserve_type);
 	if (ret) {
 		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
 		goto out;
@@ -1097,7 +1099,8 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 	BTRFS_I(inode)->outstanding_extents++;
 	ret = btrfs_set_extent_delalloc(inode,
 			BTRFS_MAX_EXTENT_SIZE + sectorsize,
-			BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, NULL, 0);
+			BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, NULL,
+			reserve_type);
 	if (ret) {
 		test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
 		goto out;
