osd: add a comment to pg_missing_set::add

Signed-off-by: lishuhao <lishuhao@unitedstack.com>

diff --git a/src/osd/osd_types.h b/src/osd/osd_types.h
index 51f91c6d6b6b62722b92e4b17ef3c0ded3e5ec74..f02febb4219110d4806a9fc5583c3d6b6ec58293 100644 (file)
--- a/src/osd/osd_types.h
+++ b/src/osd/osd_types.h
@@ -4504,6 +4504,7 @@ public:
 
   void add(const hobject_t& oid, eversion_t need, eversion_t have,
           bool is_delete, bool make_dirty = true) {
+    //if have== eversion_t() means that the object does not exist, we transfer new_object = true
     missing[oid] = item(need, have, is_delete, make_dirty, have == eversion_t());
     rmissing[need.version] = oid;
     tracker.changed(oid);