On Wed, 7 Dec 2011, KAMEZAWA Hiroyuki wrote: > From 28189e4622fd97324893a0b234183f64472a54d6 Mon Sep 17 00:00:00 2001 > From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> > Date: Wed, 7 Dec 2011 09:58:16 +0900 > Subject: [PATCH] oom: trace point for oom_score_adj > > oom_score_adj is set to prevent a task from being killed by OOM-Killer. > Some daemons sets this value and their children inerit it sometimes. > Because inheritance of oom_score_adj is done automatically, users > can be confused at seeing the value and finds it's hard to debug. > > This patch adds trace point for oom_score_adj. This adds 3 trace > points. at > - update oom_score_adj > - fork() > - rename task->comm(typically, exec()) > > Outputs will be following. > bash-2404 [006] 199.620841: oom_score_adj_update: task 2404[bash] updates oom_score_ad j=-1000 > bash-2404 [006] 205.861287: oom_score_adj_inherited: new_task=2442 oom_score_adj=-1000 > su-2442 [003] 205.861761: oom_score_task_rename: rename task 2442[bash] to [su] oom_ score_adj=-1000 > su-2442 [003] 205.866737: oom_score_adj_inherited: new_task=2444 oom_score_adj=-1000 > bash-2444 [007] 205.868136: oom_score_task_rename: rename task 2444[su] to [bash] oom_ score_adj=-1000 > bash-2444 [007] 205.870407: oom_score_adj_inherited: new_task=2445 oom_score_adj=-1000 > bash-2445 [001] 205.870975: oom_score_adj_inherited: new_task=2446 oom_score_adj=-1000 > Little bit of whitespace damage there, but looks good in the code itself. > Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> Just minor alterations to the format of the tracepoints from the first version, so carry over my Acked-by: David Rientjes <rientjes@xxxxxxxxxx> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>