On Wed, Nov 26, 2008 at 12:04 PM, <scjody@xxxxxxx> wrote: > This patch tracks various statistics related to the performance of a RAID 5 > or 6 array. These have been useful to us in the past to help solve > performance issues. They are reported via /proc/mdstat. > > I realize that the format of the statistics may not be the best, and > there may be a better location than /proc/mdstat, so I welcome suggestions > on where to put them. > > I will add documentation once we've decided on the format and location (or > if nobody objects to the current format and location.) > Hi Jody, I have done some work in this area too and have a lingering desire to hook MD up to the tracing infrastructure du jour. Have you considered using tracepoints [1]? This would save the overhead of atomic operations when we're not profiling. Regards, Dan [1]: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=Documentation/tracepoints.txt;h=5d354e16749447c667934ecd4c8f4fe5ee3da36c;hb=HEAD -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
