dax: dirty inode only if required

Signed-off-by: Dmitry Monakhov <[email protected]> Reviewed-by: Jan Kara <[email protected]> Reviewed-by: Ross Zwisler <[email protected]> Cc: Matthew Wilcox <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
dabrace · Feb 6, 2016 · d2b2a28 · d2b2a28
1 parent ae02620
commit d2b2a28
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/fs/dax.c b/fs/dax.c
@@ -358,7 +358,8 @@ static int dax_radix_entry(struct address_space *mapping, pgoff_t index,
 	void *entry;
 
 	WARN_ON_ONCE(pmd_entry && !dirty);
-	__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
+	if (dirty)
+		__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
 
 	spin_lock_irq(&mapping->tree_lock);