linux-kernel - Re: [PATCH v24b] RAS: Add a tracepoint for reporting memory controller events

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Message-ID: <4FBB0250.20100@redhat.com>
Date:	Tue, 22 May 2012 00:04:48 -0300
From:	Mauro Carvalho Chehab <mchehab@...hat.com>
To:	Borislav Petkov <borislav.petkov@....com>
CC:	"Luck, Tony" <tony.luck@...el.com>, Ingo Molnar <mingo@...nel.org>,
	Linux Edac Mailing List <linux-edac@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Aristeu Rozanski <arozansk@...hat.com>,
	Doug Thompson <norsk5@...oo.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH v24b] RAS: Add a tracepoint for reporting memory controller
 events

<offensive comments skipped>

Em 21-05-2012 17:40, Borislav Petkov escreveu:
> On Mon, May 21, 2012 at 01:40:08PM -0300, Mauro Carvalho Chehab wrote:
>> That's exactly what the latest version of this patch does.
> 
> Really, where is the address field?
> 
> +       TP_PROTO(const unsigned int err_type,
> +                const unsigned int mc_index,
> +                const char *error_msg,
> +                const char *label,
> +                const char *location,
> +                const char *core_detail,
> +                const char *driver_detail),
> 
> 
> [ … ]

The above is not the latest version of it. The latest version is:
	http://www.spinics.net/lists/kernel/msg1343822.html

The definition there is:

+/*
+ * Default error mechanisms for Memory Controller errors (CE and UE)
+ */
+TRACE_EVENT(mc_event,
+
+	TP_PROTO(const unsigned int err_type,
+		 const unsigned int mc_index,
+		 const char *error_msg,
+		 const char *label,
+		 int layer0,
+		 int layer1,
+		 int layer2,
+		 unsigned long pfn,
+		 unsigned long offset,
+		 unsigned long grain,
+		 unsigned long syndrome,
+		 const char *driver_detail),
+
+	TP_ARGS(err_type, mc_index, error_msg, label, layer0, layer1, layer2,
+		pfn, offset, grain, syndrome, driver_detail),

The address is there using the edac way to represent it (page, offset, grain). 

> We're going to have single fields for EDAC-global valid values and leave
> the driver-specific stuff lumped in one char * string.

That's exactly what I said. 

See above. driver_detail is a char string, with
the driver specific stuff. The EDAC global values are represented as-is
without being converted to integers.

Regards,
Mauro
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