linux-kernel - Re: [PATCH v22] edac, ras/hw_event.h: use events to handle hw issues

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Message-ID: <20120516210514.GA5801@aftab.osrc.amd.com>
Date:	Wed, 16 May 2012 23:05:14 +0200
From:	Borislav Petkov <bp@...64.org>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	Borislav Petkov <bp@...64.org>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Linux Edac Mailing List <linux-edac@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Doug Thompson <norsk5@...oo.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH v22] edac, ras/hw_event.h: use events to handle hw issues

On Wed, May 16, 2012 at 08:27:24PM +0000, Luck, Tony wrote:
> > No, userspace will be doing parsing because it is the only sensible
> > thing to do. The kernel's job is to carry out enough information for
> > the user to handle the error in a way which is just enough. No more, no
> > less. It is in no f*cking way expected to make it pretty and in suitable
> > portions so that userspace can consume it.
> 
> My requirement on prettiness was just that the information useful
> to a normal system owner come first. Enough to know how serious the
> problem is, and which component is affected. The fine details must
> be in the "( ... )" part - and will generally only be of interest
> to very sophisticated users.
> 
> We've reached that goal.
> 
> Looking at the next part ... which is how to write useful analysis
> tools that study these logs. We have some common elements in trace
> records - but a there is (deliberately) plenty of scope for drivers
> to add their own customizations. If these bits are going to be
> used by the user mode tools - then they will have per-driver
> parsing code that will be tightly linked to the version of the driver.

This is exactly what I'm trying to explain - the kernel carries out the
information, userspace parses it the way it sees fit.

> Are we happy with this? Once the patch goes it, we have created an
> ABI which will be hard to change.

Yes, very true.

-- 
Regards/Gruss,
Boris.

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