Bart, > SCSI tracing has to be enabled before a test is started, produces a > huge amount of data, and deriving state information from a huge trace > is far from easy. The information in debugfs provides an easy to read > overview of the current state without having to analyze megabytes of > traces, without introducing any slowdown and without having to enable > any tracing mechanism from beforehand. Fair enough. Just seems like there's an obvious overlap in plumbing. Don't know if that can be leveraged instead of introducing something completely new? -- Martin K. Petersen Oracle Linux Engineering