update comment

Signed-off-by: Vladislav Oleshko <[email protected]>

Author: dranikpg

src/core/compact_object.h

@@ -534,16 +534,16 @@ class CompactObj {
   union {
     uint8_t mask_ = 0;
     struct {
-      uint8_t ref : 1;  // Mark objects that have expiry timestamp assigned.
-      uint8_t expire : 1;
+      uint8_t ref : 1;      // Mark objects that don't own their allocation.
+      uint8_t expire : 1;   // Mark objects that have expiry timestamp assigned.
       uint8_t mc_flag : 1;  // Marks keys that have memcache flags assigned.
 
       // See the EncodingEnum for the meaning of these bits.
       uint8_t encoding : 2;
 
       // IO_PENDING is set when the tiered storage has issued an i/o request to save the value.
       // It is cleared when the io request finishes or is cancelled.
-      uint8_t io_pending : 1;  // also serves as async-delete for keys.
+      uint8_t io_pending : 1;
       uint8_t sticky : 1;
 
       // TOUCHED used to determin which items are hot/cold.

src/server/db_slice.h

@@ -325,6 +325,7 @@ class DbSlice {
   // Deletes the iterator. The iterator must be valid.
   // Context argument is used only for document removal and it just needs
   // timestamp field. Last argument, db_table, is optional and is used only in FlushSlotsCb.
+  // If async is set, AsyncDeleter will enqueue deletion of the object
   void Del(Context cntx, Iterator it, DbTable* db_table = nullptr, bool async = false);
 
   // Deletes a key after FindMutable(). Runs post_updater before deletion

src/server/generic_family.cc

@@ -1111,7 +1111,7 @@ OpResult<uint32_t> GenericFamily::OpDel(const OpArgs& op_args, const ShardArgs&
     if (!IsValid(it))
       continue;
 
-    db_slice.Del(op_args.db_cntx, it, aync);
+    db_slice.Del(op_args.db_cntx, it, async);
     ++res;
   }