https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263704
Warner Losh <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|New |In Progress Assignee|[email protected] |[email protected] --- Comment #1 from Warner Losh <[email protected]> --- On further examination, it appears to be a bug in the dynamic I/O scheduler. We can call xpt_schedule(CAM_PRI_NORMAL) during recovery which causes all existing periphs that use it to schedule their recovery operation a second time, but at a bad priority. It has nothing to do with dropping references to the device, but rather causing extra I/O to be scheduled that can persist after the periph is invalidated (because the periph driver knows nothing of the extra CCBs) leading to accessing the path after it's been freed which leads to a number of different pathologies depending on where in the CCB lifecycle we wakeup. It only affects the dynamic scheduler (all the time, but that points out another bug, the timeout ticker shouldn't run all the time if there's nothing to be controlled like bandwidth or iops). -- You are receiving this mail because: You are the assignee for the bug.
