more fix

source/dnode/vnode/src/tsdb/tsdbFS2.c

@@ -872,7 +872,11 @@ int32_t tsdbFSWaitAllBgTask(STFileSystem *fs) {
 }
 
 static int32_t tsdbFSDoDisableBgTask(STFileSystem *fs) {
-  // TODO
+  fs->stop = true;
+
+  if (fs->bgTaskRunning) {
+    tsdbDoWaitBgTask(fs, fs->bgTaskRunning);
+  }
   return 0;
 }
 
@@ -884,6 +888,8 @@ int32_t tsdbFSDisableBgTask(STFileSystem *fs) {
 }
 
 int32_t tsdbFSEnableBgTask(STFileSystem *fs) {
-  // TODO
+  taosThreadMutexLock(fs->mutex);
+  fs->stop = false;
+  taosThreadMutexUnlock(fs->mutex);
   return 0;
 }
\ No newline at end of file

source/dnode/vnode/src/tsdb/tsdbSnapshot.c

@@ -1025,6 +1025,8 @@ int32_t tsdbSnapWriterOpen(STsdb* pTsdb, int64_t sver, int64_t ever, STsdbSnapWr
   code = tsdbFSCreateCopySnapshot(pTsdb->pFS, &writer[0]->fsetArr);
   TSDB_CHECK_CODE(code, lino, _exit);
 
+  tsdbFSDisableBgTask(pTsdb->pFS);
+
 _exit:
   if (code) {
     tsdbError("vgId:%d %s failed at line %d since %s", TD_VID(pTsdb->pVnode), __func__, lino, tstrerror(code));
@@ -1075,6 +1077,7 @@ int32_t tsdbSnapWriterClose(STsdbSnapWriter** writer, int8_t rollback) {
 
     taosThreadRwlockUnlock(&writer[0]->tsdb->rwLock);
   }
+  tsdbFSEnableBgTask(tsdb->pFS);
 
   tsdbIterMergerClose(&writer[0]->ctx->tombIterMerger);
   tsdbIterMergerClose(&writer[0]->ctx->dataIterMerger);