linux-kernel - Re: [RFC PATCH 0/8] EDAC, mce_amd: Add a tracepoint for the decoded error

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Message-ID: <20170728063753.qjdn2wt4j54bo2oi@gmail.com>
Date:   Fri, 28 Jul 2017 08:37:53 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Borislav Petkov <bp@...en8.de>
Cc:     linux-edac <linux-edac@...r.kernel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Tony Luck <tony.luck@...el.com>,
        Yazen Ghannam <Yazen.Ghannam@....com>, X86 ML <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 0/8] EDAC, mce_amd: Add a tracepoint for the decoded
 error


* Borislav Petkov <bp@...en8.de> wrote:

> BUT(!), I just realized, I *think* I can address this much more elegantly: 
> extend trace_mce_record() by adding the decoded string as its last argument. And 
> that's fine, I'm being told, because adding arguments to the tracepoints is not 
> a big deal, removing them is hard. And actually, we have added args before, come 
> to think of it:

Yeah, structured, append-only ABIs are elegant - that's what perf uses too.

> I agree with the rest but you're obviously preaching to the choir.
> 
> :-)

Had do vent my (non kernel tree integrated) Linux tooling frustration!! ;-)

Thanks,

	Ingo