hfutatzhanghb commented on code in PR #6634:
URL: https://github.com/apache/hadoop/pull/6634#discussion_r1604540074


##########
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java:
##########
@@ -3654,14 +3654,15 @@ void setQuota(String src, long nsQuota, long ssQuota, 
StorageType type)
       checkSuperuserPrivilege(operationName, src);
     }
     try {
-      writeLock();
+      // Need to compute the curren space usage
+      writeLock(FSNamesystemLockMode.GLOBAL);

Review Comment:
   @ZanderXu Sir. I can not understand why we use GLOBAL lock here. Seems that 
setQuota does not involve blocks opertions.   Also in `getQuotaUsage`



##########
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java:
##########
@@ -3654,14 +3654,15 @@ void setQuota(String src, long nsQuota, long ssQuota, 
StorageType type)
       checkSuperuserPrivilege(operationName, src);
     }
     try {
-      writeLock();
+      // Need to compute the curren space usage

Review Comment:
   typo for current.



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