Re: [PATCH v4 3/3] tracing: add trace event for memory-failure

[Steven Rostedt]

On Mon, 20 Apr 2015 16:44:40 +0800
Xie XiuQi <xiexiuqi@xxxxxxxxxx> wrote:

> RAS user space tools like rasdaemon which base on trace event, could
> receive mce error event, but no memory recovery result event. So, I
> want to add this event to make this scenario complete.
> 
> This patch add a event at ras group for memory-failure.
> 
> The output like below:
> #  tracer: nop
> #
> #  entries-in-buffer/entries-written: 2/2   #P:24
> #
> #                               _-----=> irqs-off
> #                              / _----=> need-resched
> #                             | / _---=> hardirq/softirq
> #                             || / _--=> preempt-depth
> #                             ||| /     delay
> #            TASK-PID   CPU#  ||||    TIMESTAMP  FUNCTION
> #               | |       |   ||||       |         |
>        mce-inject-13150 [001] ....   277.019359: memory_failure_event: pfn 0x19869: recovery action for free buddy page: Delayed
> 
> Cc: Tony Luck <tony.luck@xxxxxxxxx>
> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
> Signed-off-by: Xie XiuQi <xiexiuqi@xxxxxxxxxx>

Looks good to me.

Acked-by: Steven Rostedt <rostedt@xxxxxxxxxxx>

-- Steve

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