diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index dff171c..244579d 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -131,7 +131,8 @@ static inline int ext4_begin_ordered_truncate(struct inode *inode,
 						   new_size);
 }
 
-static void ext4_invalidatepage(struct page *page, unsigned long offset);
+static void ext4_invalidatepage_range(struct page *page, unsigned int offset,
+				      unsigned int length);
 static int noalloc_get_block_write(struct inode *inode, sector_t iblock,
 				   struct buffer_head *bh_result, int create);
 static int ext4_set_bh_endio(struct buffer_head *bh, struct inode *inode);
@@ -1291,20 +1292,27 @@ static void ext4_da_release_space(struct inode *inode, int to_free)
 }
 
 static void ext4_da_page_release_reservation(struct page *page,
-					     unsigned long offset)
+					     unsigned int offset,
+					     unsigned int length)
 {
 	int to_release = 0;
 	struct buffer_head *head, *bh;
 	unsigned int curr_off = 0;
 	struct inode *inode = page->mapping->host;
 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
+	unsigned int stop = offset + length;
 	int num_clusters;
 
+	BUG_ON(stop > PAGE_CACHE_SIZE || stop < length);
+
 	head = page_buffers(page);
 	bh = head;
 	do {
 		unsigned int next_off = curr_off + bh->b_size;
 
+		if (next_off > stop)
+			break;
+
 		if ((offset <= curr_off) && (buffer_delay(bh))) {
 			to_release++;
 			clear_buffer_delay(bh);
@@ -2637,7 +2645,9 @@ static int ext4_da_write_end(struct file *file,
 	return ret ? ret : copied;
 }
 
-static void ext4_da_invalidatepage(struct page *page, unsigned long offset)
+static void ext4_da_invalidatepage_range(struct page *page,
+					 unsigned int offset,
+					 unsigned int length)
 {
 	/*
 	 * Drop reserved blocks
@@ -2646,10 +2656,10 @@ static void ext4_da_invalidatepage(struct page *page, unsigned long offset)
 	if (!page_has_buffers(page))
 		goto out;
 
-	ext4_da_page_release_reservation(page, offset);
+	ext4_da_page_release_reservation(page, offset, length);
 
 out:
-	ext4_invalidatepage(page, offset);
+	ext4_invalidatepage_range(page, offset, length);
 
 	return;
 }
@@ -2775,47 +2785,60 @@ ext4_readpages(struct file *file, struct address_space *mapping,
 	return mpage_readpages(mapping, pages, nr_pages, ext4_get_block);
 }
 
-static void ext4_invalidatepage_free_endio(struct page *page, unsigned long offset)
+static void ext4_invalidatepage_free_endio(struct page *page,
+					   unsigned int offset,
+					   unsigned int length)
 {
 	struct buffer_head *head, *bh;
 	unsigned int curr_off = 0;
+	unsigned int stop = offset + length;
 
 	if (!page_has_buffers(page))
 		return;
+
+	BUG_ON(stop > PAGE_CACHE_SIZE || stop < length);
+
 	head = bh = page_buffers(page);
 	do {
+		unsigned int next_off = curr_off + bh->b_size;
+
+		if (next_off > stop)
+			return;
+
 		if (offset <= curr_off && test_clear_buffer_uninit(bh)
 					&& bh->b_private) {
 			ext4_free_io_end(bh->b_private);
 			bh->b_private = NULL;
 			bh->b_end_io = NULL;
 		}
-		curr_off = curr_off + bh->b_size;
+		curr_off = next_off;
 		bh = bh->b_this_page;
 	} while (bh != head);
 }
 
-static void ext4_invalidatepage(struct page *page, unsigned long offset)
+static void ext4_invalidatepage_range(struct page *page, unsigned int offset,
+				      unsigned int length)
 {
 	journal_t *journal = EXT4_JOURNAL(page->mapping->host);
 
-	trace_ext4_invalidatepage(page, offset);
+	trace_ext4_invalidatepage_range(page, offset, length);
 
 	/*
 	 * free any io_end structure allocated for buffers to be discarded
 	 */
 	if (ext4_should_dioread_nolock(page->mapping->host))
-		ext4_invalidatepage_free_endio(page, offset);
+		ext4_invalidatepage_free_endio(page, offset, length);
 	/*
 	 * If it's a full truncate we just forget about the pending dirtying
 	 */
-	if (offset == 0)
+	if (offset == 0 && length == PAGE_CACHE_SIZE)
 		ClearPageChecked(page);
 
 	if (journal)
-		jbd2_journal_invalidatepage(journal, page, offset);
+		jbd2_journal_invalidatepage_range(journal, page,
+						  offset, length);
 	else
-		block_invalidatepage(page, offset);
+		block_invalidatepage_range(page, offset, length);
 }
 
 static int ext4_releasepage(struct page *page, gfp_t wait)
@@ -3187,7 +3210,7 @@ static const struct address_space_operations ext4_ordered_aops = {
 	.write_begin		= ext4_write_begin,
 	.write_end		= ext4_ordered_write_end,
 	.bmap			= ext4_bmap,
-	.invalidatepage		= ext4_invalidatepage,
+	.invalidatepage_range	= ext4_invalidatepage_range,
 	.releasepage		= ext4_releasepage,
 	.direct_IO		= ext4_direct_IO,
 	.migratepage		= buffer_migrate_page,
@@ -3202,7 +3225,7 @@ static const struct address_space_operations ext4_writeback_aops = {
 	.write_begin		= ext4_write_begin,
 	.write_end		= ext4_writeback_write_end,
 	.bmap			= ext4_bmap,
-	.invalidatepage		= ext4_invalidatepage,
+	.invalidatepage_range	= ext4_invalidatepage_range,
 	.releasepage		= ext4_releasepage,
 	.direct_IO		= ext4_direct_IO,
 	.migratepage		= buffer_migrate_page,
@@ -3218,7 +3241,7 @@ static const struct address_space_operations ext4_journalled_aops = {
 	.write_end		= ext4_journalled_write_end,
 	.set_page_dirty		= ext4_journalled_set_page_dirty,
 	.bmap			= ext4_bmap,
-	.invalidatepage		= ext4_invalidatepage,
+	.invalidatepage_range	= ext4_invalidatepage_range,
 	.releasepage		= ext4_releasepage,
 	.direct_IO		= ext4_direct_IO,
 	.is_partially_uptodate  = block_is_partially_uptodate,
@@ -3233,7 +3256,7 @@ static const struct address_space_operations ext4_da_aops = {
 	.write_begin		= ext4_da_write_begin,
 	.write_end		= ext4_da_write_end,
 	.bmap			= ext4_bmap,
-	.invalidatepage		= ext4_da_invalidatepage,
+	.invalidatepage_range	= ext4_da_invalidatepage_range,
 	.releasepage		= ext4_releasepage,
 	.direct_IO		= ext4_direct_IO,
 	.migratepage		= buffer_migrate_page,
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 69d8a69..ee7e11a 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -450,14 +450,15 @@ DEFINE_EVENT(ext4__page_op, ext4_releasepage,
 	TP_ARGS(page)
 );
 
-TRACE_EVENT(ext4_invalidatepage,
-	TP_PROTO(struct page *page, unsigned long offset),
+TRACE_EVENT(ext4_invalidatepage_range,
+	TP_PROTO(struct page *page, unsigned int offset, unsigned int length),
 
-	TP_ARGS(page, offset),
+	TP_ARGS(page, offset, length),
 
 	TP_STRUCT__entry(
 		__field(	pgoff_t, index			)
-		__field(	unsigned long, offset		)
+		__field(	unsigned int, offset		)
+		__field(	unsigned int, length		)
 		__field(	ino_t,	ino			)
 		__field(	dev_t,	dev			)
 
@@ -466,14 +467,16 @@ TRACE_EVENT(ext4_invalidatepage,
 	TP_fast_assign(
 		__entry->index	= page->index;
 		__entry->offset	= offset;
+		__entry->length	= length;
 		__entry->ino	= page->mapping->host->i_ino;
 		__entry->dev	= page->mapping->host->i_sb->s_dev;
 	),
 
-	TP_printk("dev %d,%d ino %lu page_index %lu offset %lu",
+	TP_printk("dev %d,%d ino %lu page_index %lu offset %u length %u",
 		  MAJOR(__entry->dev), MINOR(__entry->dev),
 		  (unsigned long) __entry->ino,
-		  (unsigned long) __entry->index, __entry->offset)
+		  (unsigned long) __entry->index,
+		  __entry->offset, __entry->length)
 );
 
 TRACE_EVENT(ext4_discard_blocks,