linux-kernel - Re: use memcpy_mcsafe() for copy_to_iter() (was: Re: [PATCH v3 0/9] Series short description)

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Message-ID: <CA+55aFwJ=DvvcrM725KOYAF_c=uKiQcuHz4taPjbKveOVPycKA@mail.gmail.com>
Date:   Mon, 14 May 2018 12:20:14 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     Ingo Molnar <mingo@...nel.org>,
        "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
        Tony Luck <tony.luck@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Snitzer <snitzer@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andy Lutomirski <luto@...capital.net>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Mika Penttilä <mika.penttila@...tfour.com>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Christoph Hellwig <hch@....de>,
        Al Viro <viro@...iv.linux.org.uk>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: use memcpy_mcsafe() for copy_to_iter() (was: Re: [PATCH v3 0/9]
 Series short description)

On Mon, May 14, 2018 at 8:52 AM Dan Williams <dan.j.williams@...el.com>
wrote:

> I think "happy" is a strong word when it comes to x86 machine check
> handling. My interpretation is that he and Andy acquiesced that this
> is about the best we can do with dax+mce as things stand today.

Yeah. I definitely wouldn't say "happy", but perhaps "resigned". There's
nothing horrible going on, except for just plain nasty interfaces and
apparently disgusting hw problems wrt "rep movs/stos".

                  Linus