public void warmupFile() {
        if (!isMapped()) {
            return;
        }
        // Lock memory
        if (Platform.isLinux()) {
            hintLoad();
        }
    }
Returns true when the segment file contains the log index.

@param logIndex the log index
@return true if the segment file contains the log index, otherwise return false
jraft-extension/java-log-storage-impl/src/main/java/com/alipay/sofa/jraft/storage/file/AbstractFile.java