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From: "Luck, Tony" <tony.luck@intel.com>
To: Borislav Petkov <bp@alien8.de>
Cc: "Song, Youquan" <youquan.song@intel.com>,
	"x86@kernel.org" <x86@kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] x86/mce: Add Skylake quirk for patrol scrub reported errors
Date: Wed, 17 Jun 2020 11:49:01 -0700	[thread overview]
Message-ID: <20200617184901.GA387@agluck-desk2.amr.corp.intel.com> (raw)
In-Reply-To: <20200617074158.GB10118@zn.tnic>

On Wed, Jun 17, 2020 at 09:41:58AM +0200, Borislav Petkov wrote:
> On Tue, Jun 16, 2020 at 10:33:08PM +0000, Luck, Tony wrote:
> > If the BIOS option is left in the default setting, uncorrectable errors found
> > by the patrol scrubber are reported with a machine check. Those MSCOD
> > and MCACOD signatures are the same ... but that's not important because
> > MCi_STATUS.UC==1. So Linux doesn't need to jump through hoops to
> > "upgrade" the severity.
> 
> No, this is not what I meant: I meant when you have the setting enabled
> to downgrade those errors, can they be detected as part of another MCE
> being raised...

Yes one of these downgraded error logs could be sitting in a bank
whe a different machine check fires. But the severity calculation will
ignore it as MCi_STATUS.EN==0

-Tony

  reply	other threads:[~2020-06-17 18:49 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-15 18:40 Tony Luck
2020-06-16 19:29 ` Borislav Petkov
2020-06-16 22:33   ` Luck, Tony
2020-06-17  7:41     ` Borislav Petkov
2020-06-17 18:49       ` Luck, Tony [this message]
2020-08-28 20:21         ` [PATCH v2] " Luck, Tony
2020-09-25 19:19           ` Borislav Petkov
2020-09-25 23:06             ` Luck, Tony
2020-09-27 22:19               ` Borislav Petkov
2020-09-30  2:13                 ` [PATCH 0/2] mce severity quirk & cleanup Tony Luck
2020-09-30  2:13                   ` [PATCH 1/2] x86/mce: Add Skylake quirk for patrol scrub reported errors Tony Luck
2020-09-30  5:53                     ` [tip: ras/core] " tip-bot2 for Borislav Petkov
2020-09-30  2:13                   ` [PATCH 2/2] x86/mce: Drop AMD specific "DEFERRED" case from Intel severity rule list Tony Luck
2020-09-30  5:53                     ` [tip: ras/core] x86/mce: Drop AMD-specific " tip-bot2 for Tony Luck
2021-03-22 22:37 [PATCH] x86/mce: Add Skylake quirk for patrol scrub reported errors Tony Luck
2021-03-24 15:00 ` Borislav Petkov
2021-03-24 15:35   ` Luck, Tony

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