Did we forget to unpin buf in function "revmap_physical_extend" ?

422     else

 423     {

 424         if (needLock)

 425             LockRelationForExtension(irel, ExclusiveLock);

 426 

 427         buf = ReadBuffer(irel, P_NEW);

 428         if (BufferGetBlockNumber(buf) != mapBlk)

 429         {

 430             /*

 431              * Very rare corner case: somebody extended the relation

 432              * concurrently after we read its length.  If this happens, give

 433              * up and have caller start over.  We will have to evacuate that

 434              * page from under whoever is using it.

 435              */

 436             if (needLock)

 437                 UnlockRelationForExtension(irel, ExclusiveLock);

 438             LockBuffer(revmap->rm_metaBuf, BUFFER_LOCK_UNLOCK);

 439             return;

 440         }

 441         LockBuffer(buf, BUFFER_LOCK_EXCLUSIVE);

 442         page = BufferGetPage(buf);

 443 

 444         if (needLock)

 445             UnlockRelationForExtension(irel, ExclusiveLock);

 446     }

Jinyu,

regards