From: Borislav Petkov <bp@alien8.de>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: rui wang <ruiv.wang@gmail.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"gong.chen@linux.intel.com" <gong.chen@linux.intel.com>,
"Wang, Rui Y" <rui.y.wang@intel.com>
Subject: Re: [PATCH v3] x86/mce: Try printing all machine check banks known before panic
Date: Sun, 23 Nov 2014 21:55:28 +0100 [thread overview]
Message-ID: <20141123205527.GB7355@pd.tnic> (raw)
In-Reply-To: <3908561D78D1C84285E8C5FCA982C28F32950618@ORSMSX114.amr.corp.intel.com>
On Fri, Nov 21, 2014 at 09:59:49PM +0000, Luck, Tony wrote:
> > Oh, cpu errata. So this would mean that we can't even rely on the
> > contents of the MCA banks, can we?
> >
> > In any case, is any of the information in the MCA banks in such cases
> > even usable then? Because if not, we're definitely barking up the wrong
> > tree...
>
> See above - I think even if there is a bug in the core that isn't setting the
> right bits in the MCi_STATUS register - we could get good data from
> devices out in the uncore.
Btw, since we're talking about errata - I guess you could use X86_BUG
and static_cpu_has_bug* to query in do_machine_check and modify logging
behavior of mce_log to bypass mce_severity and put all errors of the
last round in mce_log and then dump them out at panic time.
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
next prev parent reply other threads:[~2014-11-23 20:55 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-19 9:22 [PATCH v3] x86/mce: Try printing all machine check banks known before panic ruiv.wang
2014-11-19 10:29 ` Borislav Petkov
2014-11-19 23:34 ` Luck, Tony
2014-11-20 10:15 ` Borislav Petkov
2014-11-21 1:20 ` rui wang
2014-11-21 16:41 ` Borislav Petkov
2014-11-21 17:20 ` Luck, Tony
2014-11-21 18:13 ` Borislav Petkov
2014-11-21 21:31 ` Luck, Tony
2014-11-21 21:35 ` Borislav Petkov
2014-11-21 21:59 ` Luck, Tony
2014-11-23 20:55 ` Borislav Petkov [this message]
2014-11-22 2:16 ` rui wang
2014-11-22 9:44 ` Borislav Petkov
2014-11-22 15:32 ` rui wang
2014-11-22 16:31 ` Borislav Petkov
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