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

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Date:	Mon, 20 Apr 2015 15:53:48 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Xie XiuQi <xiexiuqi@...wei.com>
Cc:	<n-horiguchi@...jp.nec.com>, <mingo@...hat.com>,
	<akpm@...ux-foundation.org>, <kirill.shutemov@...ux.intel.com>,
	<koct9i@...il.com>, <hpa@...ux.intel.com>, <hannes@...xchg.org>,
	<iamjoonsoo.kim@....com>, <luto@...capital.net>,
	<nasa4836@...il.com>, <gong.chen@...ux.intel.com>,
	<bhelgaas@...gle.com>, <bp@...e.de>, <tony.luck@...el.com>,
	<linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
	<jingle.chen@...wei.com>
Subject: Re: [PATCH v4 3/3] tracing: add trace event for memory-failure

On Mon, 20 Apr 2015 16:44:40 +0800
Xie XiuQi <xiexiuqi@...wei.com> 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@...el.com>
> Cc: Steven Rostedt <rostedt@...dmis.org>
> Signed-off-by: Xie XiuQi <xiexiuqi@...wei.com>

Looks good to me.

Acked-by: Steven Rostedt <rostedt@...dmis.org>

-- Steve

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