This is a format change that could break established scripts. But hopefully it's more human friendly to show the relative values like "30000" (30s old) or "0" (all fresh ones) than long absolute jiffy numbers. Note that the initial 30000 or 0 may increase over time as they are now relative numbers. CC: Jan Kara CC: Dave Chinner Signed-off-by: Wu Fengguang --- include/trace/events/writeback.h | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) --- linux-next.orig/include/trace/events/writeback.h 2011-05-04 16:09:59.000000000 +0800 +++ linux-next/include/trace/events/writeback.h 2011-05-04 16:10:57.000000000 +0800 @@ -115,7 +115,7 @@ DECLARE_EVENT_CLASS(wbc_class, __field(int, for_reclaim) __field(int, range_cyclic) __field(int, more_io) - __field(unsigned long, older_than_this) + __field(int, older) __field(long, range_start) __field(long, range_end) ), @@ -130,14 +130,15 @@ DECLARE_EVENT_CLASS(wbc_class, __entry->for_reclaim = wbc->for_reclaim; __entry->range_cyclic = wbc->range_cyclic; __entry->more_io = wbc->more_io; - __entry->older_than_this = wbc->older_than_this ? - *wbc->older_than_this : 0; + __entry->older = wbc->older_than_this ? + (jiffies - *wbc->older_than_this) * 1000 / HZ + : -1; __entry->range_start = (long)wbc->range_start; __entry->range_end = (long)wbc->range_end; ), TP_printk("bdi %s: towrt=%ld skip=%ld mode=%d kupd=%d " - "bgrd=%d reclm=%d cyclic=%d more=%d older=0x%lx " + "bgrd=%d reclm=%d cyclic=%d more=%d older=%d " "start=0x%lx end=0x%lx", __entry->name, __entry->nr_to_write, @@ -148,7 +149,7 @@ DECLARE_EVENT_CLASS(wbc_class, __entry->for_reclaim, __entry->range_cyclic, __entry->more_io, - __entry->older_than_this, + __entry->older, __entry->range_start, __entry->range_end) ) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/