This is an automated cherry-pick of pingcap#57454

Signed-off-by: ti-chi-bot <[email protected]>

br/pkg/lightning/mydump/reader.go

@@ -170,8 +170,16 @@ func (pr PooledReader) Read(p []byte) (n int, err error) {
 
 // Seek implements io.Seeker
 func (pr PooledReader) Seek(offset int64, whence int) (int64, error) {
+<<<<<<< HEAD:br/pkg/lightning/mydump/reader.go
 	w := pr.ioWorkers.Apply()
 	defer pr.ioWorkers.Recycle(w)
+=======
+	// 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)
+	}
+>>>>>>> 0e3efb6ea8b (Lightning: Skip apply ioworkers when seek(0, io.SeekCurrent) (#57454)):pkg/lightning/mydump/reader.go
 	return pr.reader.Seek(offset, whence)
 }