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    SubjectRe: [PATCH] oom: add tracepoints for oom_score_adj
    On Wed, 7 Dec 2011, KAMEZAWA Hiroyuki wrote:

    > From 28189e4622fd97324893a0b234183f64472a54d6 Mon Sep 17 00:00:00 2001
    > From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    > 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@jp.fujitsu.com>

    Just minor alterations to the format of the tracepoints from the first
    version, so carry over my

    Acked-by: David Rientjes <rientjes@google.com>


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