linux-kernel - Re: [PATCH v2 2/4] mm/hwpoison: remove race consideration

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Date:   Wed, 27 Oct 2021 10:18:07 +0900
From:   Naoya Horiguchi <naoya.horiguchi@...ux.dev>
To:     Yang Shi <shy828301@...il.com>
Cc:     Linux MM <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Oscar Salvador <osalvador@...e.de>,
        Michal Hocko <mhocko@...e.com>,
        Ding Hui <dinghui@...gfor.com.cn>,
        Tony Luck <tony.luck@...el.com>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
        Miaohe Lin <linmiaohe@...wei.com>,
        Peter Xu <peterx@...hat.com>,
        Naoya Horiguchi <naoya.horiguchi@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/4] mm/hwpoison: remove race consideration

On Tue, Oct 26, 2021 at 06:04:13PM -0700, Yang Shi wrote:
> On Mon, Oct 25, 2021 at 4:06 PM Naoya Horiguchi
> <naoya.horiguchi@...ux.dev> wrote:
> >
> > From: Naoya Horiguchi <naoya.horiguchi@....com>
> >
> > Now memory_failure() and unpoison_memory() are protected by mf_mutex,
> > so no need to explicitly check races between them.  So remove them.
> 
> It seems this patch could be folded into patch #1. Some "unlock_mutex"
> were added by patch #1 then they were removed by this patch
> immediately, it seems a bit of a waste and this patch is actually the
> by-product of patch #1.

OK, I'll do this in the next post.

Thanks,
Naoya Horiguchi