摘要： It's where the original changes were discussedhttps://lkml.org/lkml/2011/5/24/227It's where the specific questions were answered about tx_submit() and device_issue_pending()http://www.gossamer-threads.com/lists/linux/kernel/1408064?search_string=tx_submit;#1408064they were:tx_submit is not s 阅读全文