Mel Gorman 52bb919866 writeback: account for time spent congestion_waited ... There is strong evidence to indicate a lot of time is being spent in congestion_wait(), some of it unnecessarily. This patch adds a tracepoint for congestion_wait to record when congestion_wait() was called, how long the timeout was for and how long it actually slept. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Reviewed-by: Minchan Kim <minchan.kim@gmail.com> Reviewed-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2010-10-26 16:52:07 -07:00
..
events	writeback: account for time spent congestion_waited	2010-10-26 16:52:07 -07:00
define_trace.h	tracing: Fix tracepoint.h DECLARE_TRACE() to allow more than one header	2010-05-05 11:46:17 -04:00
ftrace.h	tracing: Drop cpparg() macro	2010-08-02 01:31:28 +02:00
syscall.h	tracing: Use a global field list for all syscall exit events	2010-06-28 17:12:44 -04:00