diff --git a/br/pkg/lightning/mydump/reader.go b/br/pkg/lightning/mydump/reader.go
index 39cf5ca224c58..1a25cd31b58f0 100644
--- a/br/pkg/lightning/mydump/reader.go
+++ b/br/pkg/lightning/mydump/reader.go
@@ -187,7 +187,8 @@ func (pr PooledReader) Read(p []byte) (n int, err error) {
 
 // Seek implements io.Seeker
 func (pr PooledReader) Seek(offset int64, whence int) (int64, error) {
-	if pr.ioWorkers != nil {
+	// Seek(0, io.SeekCurrent) is used to get the current offset, which will not cause any Disk I/O.
+	if pr.ioWorkers != nil && !(offset == 0 && whence == io.SeekCurrent) {
 		w := pr.ioWorkers.Apply()
 		defer pr.ioWorkers.Recycle(w)
 	}