linux-kernel - Re: [PATCH v1 3/3] mm,hwpoison: add kill_accessing

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Message-ID: <20210420075118.GB24451@hori.linux.bs1.fc.nec.co.jp>
Date:   Tue, 20 Apr 2021 07:51:19 +0000
From:   HORIGUCHI NAOYA(堀口　直也) 
        <naoya.horiguchi@....com>
To:     Jue Wang <juew@...gle.com>
CC:     "nao.horiguchi@...il.com" <nao.horiguchi@...il.com>,
        "Luck, Tony" <tony.luck@...el.com>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "bp@...en8.de" <bp@...en8.de>,
        "david@...hat.com" <david@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "luto@...nel.org" <luto@...nel.org>,
        "osalvador@...e.de" <osalvador@...e.de>,
        "yaoaili@...gsoft.com" <yaoaili@...gsoft.com>
Subject: Re: [PATCH v1 3/3] mm,hwpoison: add kill_accessing_process() to find
 error virtual address

On Mon, Apr 19, 2021 at 06:49:15PM -0700, Jue Wang wrote:
> On Tue, 13 Apr 2021 07:43:20 +0900, Naoya Horiguchi wrote:
> ...
> > + * This function is intended to handle "Action Required" MCEs on already
> > + * hardware poisoned pages. They could happen, for example, when
> > + * memory_failure() failed to unmap the error page at the first call, or
> > + * when multiple Action Optional MCE events races on different CPUs with
> > + * Local MCE enabled.
> 
> +Tony Luck
> 
> Hey Tony, I thought SRAO MCEs are broadcasted to all cores in the system
> as they come without an execution context, is it correct?
> 
> If Yes, Naoya, I think we might want to remove the comments about the
> "multiple Action Optional MCE racing" part.

Hi Jue,

I just wrote a mistake and I meant "when multiple Action Required MCE events races ...".
Sorry and thank you for finding it.  This will be fixed in the later versions.

Thanks,
Naoya Horiguchi