linux-kernel - RE: [UNTESTED PATCH] x86, mce: Avoid double entry of deferred errors into the genpool.

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Message-ID: <3908561D78D1C84285E8C5FCA982C28F39E9C367@ORSMSX114.amr.corp.intel.com>
Date:	Thu, 19 Nov 2015 19:33:58 +0000
From:	"Luck, Tony" <tony.luck@...el.com>
To:	Borislav Petkov <bp@...en8.de>
CC:	"Chen, Gong" <gong.chen@...ux.intel.com>,
	"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [UNTESTED PATCH] x86, mce: Avoid double entry of deferred
 errors into the genpool.

> Applied, thanks.

Did you test it (note the "UNTESTED" in the subject!).  My usual system for this is getting upgrades and being
flaky at the moment.

> Btw, looking at that mce.usable_addr, it doesn't make a whole lotta
> sense to me and we can use mce_usable_address() directly instead and use
> the byte in struct mce for something more important. So how about I kill
> it (diff ontop of yours):

Sure.  "struct mce" is visible to user space via /dev/mcelog. But the only user is the
mcelog(8) daemon ... and it was never updated to look at the usable_addr field. So
returning it to "pad" status is fine.

-Tony