linux-kernel - RE: [PATCH v2] x86/mce: Do away with unnecessary context quirks

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Message-ID: <SJ1PR11MB60837DE56FAE5869234BB34BFC34A@SJ1PR11MB6083.namprd11.prod.outlook.com>
Date: Fri, 15 Aug 2025 16:14:12 +0000
From: "Luck, Tony" <tony.luck@...el.com>
To: Yazen Ghannam <yazen.ghannam@....com>
CC: "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>, "avadhut.naik@....com"
	<avadhut.naik@....com>, "john.allen@....com" <john.allen@....com>
Subject: RE: [PATCH v2] x86/mce: Do away with unnecessary context quirks

> Okay, fair enough. It seems like these quirks should stay. Thanks for
> the discussion. It really helped me better understand these quirks and
> their history.

Yazen,

Maybe someday we should say "enough" and clean out code to support ancient history.
That Sandybridge CPU was launched in 2012, discontinued in 2015, and is now out of
service window (meaning no new microcode updates). With only 8 cores and 20MB
L3 cache, I expect many laptops now run rings around it.

Linux has a history of supporting systems long after manufacturers have moved on,
but it does eventually drop old stuff. Maybe today isn't the right time. But perhaps
2033 when those old system reach USA legal drinking age :-)

-Tony