Hello Christoph, A kernel bug report was opened against Ubuntu [0]. After a kernel bisect, it was found that reverting the following commit resolved this bug: commit 64d513ac31bd02a3c9b69ef04444f36c196f9a9d Author: Christoph Hellwig <hch@xxxxxx> Date: Thu Oct 8 09:28:04 2015 +0100 scsi: use host wide tags by default The regression was introduced as of v4.4-rc1. I was hoping to get your feedback, since you are the patch author. Do you think gathering any additional data will help diagnose this issue, or would it be best to submit a revert request? Thanks, Joe [0] http://pad.lv/1561830 -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html