LU-16713 llite: writeback/commit pages under memory pressure

[fs/lustre-release.git] / lustre / obdclass / cl_object.c

diff --git a/lustre/obdclass/cl_object.c b/lustre/obdclass/cl_object.c
index 718f182..e3bc29f 100644 (file)
--- a/lustre/obdclass/cl_object.c
+++ b/lustre/obdclass/cl_object.c
@@ -253,6 +253,25 @@ int cl_object_attr_update(const struct lu_env *env, struct cl_object *top,
 EXPORT_SYMBOL(cl_object_attr_update);
 
 /**
+ * Mark the inode as dirty when the inode has uncommitted (unstable) pages.
+ * Thus when the system is under momory pressure, it will trigger writeback
+ * on background to commit and unpin the pages.
+ */
+void cl_object_dirty_for_sync(const struct lu_env *env, struct cl_object *top)
+{
+       struct cl_object *obj;
+
+       ENTRY;
+
+       cl_object_for_each(obj, top) {
+               if (obj->co_ops->coo_dirty_for_sync != NULL)
+                       obj->co_ops->coo_dirty_for_sync(env, obj);
+       }
+       EXIT;
+}
+EXPORT_SYMBOL(cl_object_dirty_for_sync);
+
+/**
  * Notifies layers (bottom-to-top) that glimpse AST was received.
  *
  * Layers have to fill \a lvb fields with information that will be shipped