On Mon, 2006-09-18 at 13:20 +0200, Martin Peschke wrote: > This patch makes the SCSI mid layer report statistics data, i.e. request > sizes, request latencies, request results and queue utilisation. > For sample output please see below. This data is only gathered if these > statistics have been enabled by users at run time (default is off). > > It is crucial (for us) to be able to look at such kernel level data in > case of customer situations. It allows us to determine what kind of > requests might be involved in performance situations. This information > helps to understand whether one faces a device issue or a Linux issue. > Not being able to tap into performance data is regarded as a big minus > by some enterprise customers, who are reluctant to use Linux SCSI > support or Linux. > > Patch is against 2.6.18-rc6-mm2, as it requires the statistics > infrastructure patches. wouldn't this be nicer as a block level functionality? -- if you want to mail me at work (you don't), use arjan (at) linux.intel.com - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
