when disk error happens, osd reports assertion failure without any error information
I used fio+librbd to test one osd(bluestore), which built in an NVME SSD. After I plug-out this SSD, osd reports assertion failure "assert(r>=0)", and no more useful information. I tried filestore with same case, it reported the failed io information, and dumped assert(0 == "got unexpected error from io_getevents").
Need to implement this part in KernelDevice.cc same as FileJournal.cc.