On behalf of Gopise Yuan.
This is a debugging patch for adding support for showing interrupt status (same as ‘cat /proc/interrupts’) in Sysrq. Can be triggered by “y”.
Might be useful for debugging some hang/stuck issue.
Note:
Only for debugging purpose. Triggering it in normal case may throttle current cpu and cause IPC/RCU abnormal due to long printing to console.
