From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1751132AbeEBIao (ORCPT <rfc822;w@1wt.eu>);
        Wed, 2 May 2018 04:30:44 -0400
Received: from mail.skyhub.de ([5.9.137.197]:59726 "EHLO mail.skyhub.de"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1750859AbeEBIan (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Wed, 2 May 2018 04:30:43 -0400
Date: Wed, 2 May 2018 10:30:21 +0200
From: Borislav Petkov <bp@alien8.de>
To: Dan Williams <dan.j.williams@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        "linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>,
        Tony Luck <tony.luck@intel.com>, Peter Zijlstra <peterz@infradead.org>,
        the arch/x86 maintainers <x86@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Andy Lutomirski <luto@amacapital.net>, Ingo Molnar <mingo@redhat.com>,
        Al Viro <viro@zeniv.linux.org.uk>,
        Andrew Morton <akpm@linux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/6] use memcpy_mcsafe() for copy_to_iter()
Message-ID: <20180502083021.GC2851@pd.tnic>
References: <152520750404.36522.15462513519590065300.stgit@dwillia2-desk3.amr.corp.intel.com>
 <CA+55aFwoOee_8H-1KRnY1G-Ud4Rez16s8xjVbG8YOPn1jqxxtg@mail.gmail.com>
 <CAPcyv4jA98NVNqYFpj29OHE45HVp1DMH9oFO4-neWKA_4WKTwA@mail.gmail.com>
 <CA+55aFwZ3hrrOJ5W-C8gdam3aGNxz8FEAq9gPnRBkVmwu4BvYA@mail.gmail.com>
 <CAPcyv4i=cjQr9xvxt+Mjp-fhzyNJdTTp7uaAtpJN9R4gPg_j-Q@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <CAPcyv4i=cjQr9xvxt+Mjp-fhzyNJdTTp7uaAtpJN9R4gPg_j-Q@mail.gmail.com>
User-Agent: Mutt/1.9.3 (2018-01-21)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Tue, May 01, 2018 at 07:25:57PM -0700, Dan Williams wrote:
> Right, but the only way to make MCE non-fatal is to teach the machine
> check handler about recoverable conditions. This patch teaches the
> machine check handler how to recover copy_to_iter() errors.

Yeah, about that: maybe we talked about this at the time but does the
actual MCE signature state the error was caused by a read from an nvdimm
range?

Because if so, we could lower the severity of the error when we look at
it in the #MC handler and do some more graceful handling later...

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.