I was investigating a performance issue with BFQ IO scheduler and I was pondering why I'm not seeing informational messages from BFQ. After quite some debugging I have found out that commit 35fe6d763229 "block: use standard blktrace API to output cgroup info for debug notes" broke standard blktrace API - namely the informational messages logged by bfq_log_bfqq() are no longer displayed by blkparse(8) tool. This is because these messages have now __BLK_TA_CGROUP bit set and that breaks flags checking in blkparse(1) and iowatcher(1). This series fixes both tools to be able to cope with events with __BLK_TA_CGROUP flag set. Honza
