Hi, Fan or Andrew, 74e3d1e17b2e11d175970b85acd44f5927000ba2 include/linux/fs.h: disable preempt when acquire i_size_seqcount write lock This looks applicable to stable-3.4, that fix a lockup while two rt tasks bind to one CPU core. It was built successful for me. What do you think? Thanks! Zhao Hongjiang -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html