linux-kernel - RE: [PATCH 3/3] mce: acpi/apei: trace: Enable ghes memory error trace event

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Message-ID: <3908561D78D1C84285E8C5FCA982C28F31CB8DB5@ORSMSX106.amr.corp.intel.com>
Date:	Tue, 13 Aug 2013 17:39:00 +0000
From:	"Luck, Tony" <tony.luck@...el.com>
To:	"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
	Mauro Carvalho Chehab <m.chehab@...sung.com>
CC:	Borislav Petkov <bp@...en8.de>,
	"bhelgaas@...gle.com" <bhelgaas@...gle.com>,
	"rostedt@...dmis.org" <rostedt@...dmis.org>,
	"rjw@...k.pl" <rjw@...k.pl>,
	"lance.ortiz@...com" <lance.ortiz@...com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Aristeu Rozanski Filho" <arozansk@...hat.com>
Subject: RE: [PATCH 3/3] mce: acpi/apei: trace: Enable ghes memory error
 trace event

> In the meantime, like Boris suggests, I think we can have a different 
> trace event for raw APEI reports - userspace can use it as it pleases.
>
> Once ghes_edac gets better, users can decide whether they want raw APEI 
> reports or the EDAC-processed version and choose one or the other trace 
> event.

It's cheap to add as many tracepoints as we like - but may be costly to maintain.
Especially if we have to tinker with them later to adjust which things are logged,
that puts a burden on user-space tools to be updated to adapt to the changing
API.

Mauro has written his user-space tool to process the ghes-edac events:
  git://git.fedorahosted.org/rasdaemon.git

Who is writing the user space tools to process the new apei tracepoints
you want to add?

I'm not opposed to these patches - just wondering who is taking the next step
to make them useful.

-Tony
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