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Date: Tue, 8 Nov 2016 21:39:02 +0100 (CET)
From: Thomas Gleixner <tglx@linutronix.de>
To: Borislav Petkov <bp@alien8.de>
cc: "Luck, Tony" <tony.luck@intel.com>,
        linux-edac <linux-edac@vger.kernel.org>, X86 ML <x86@kernel.org>,
        LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] x86/MCE: Remove MCP_TIMESTAMP
In-Reply-To: <20161108180932.wvvcbbzrzrai26eg@pd.tnic>
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References: <20161101120911.13163-1-bp@alien8.de> <20161105131104.drouavgezizz4w7v@pd.tnic> <3908561D78D1C84285E8C5FCA982C28F3A22720B@ORSMSX114.amr.corp.intel.com> <20161107180853.4uxlvtoychzhwr2q@pd.tnic> <3908561D78D1C84285E8C5FCA982C28F3A22728C@ORSMSX114.amr.corp.intel.com>
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On Tue, 8 Nov 2016, Borislav Petkov wrote:
> 
> Also, this fixes another bug where machine_check_poll() would clear
> mce.tsc unconditionally even if we requested precise MCP_TIMESTAMP
> logging.

> @@ -713,7 +713,6 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
>  		m.misc = 0;
>  		m.addr = 0;
>  		m.bank = i;
> -		m.tsc = 0;

That does not make any sense. Where is m.tsc initialized? I couldn't find
any place which does, except this and the conditional clear farther down in
that function.

Thanks,

	tglx