linux-kernel - RE: [PATCH v2] mm, hwpoison: Try to recover from copy-on write faults

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Date:   Fri, 21 Oct 2022 03:57:33 +0000
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Miaohe Lin <linmiaohe@...wei.com>
CC:     Naoya Horiguchi <naoya.horiguchi@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Matthew Wilcox <willy@...radead.org>,
        "Williams, Dan J" <dan.j.williams@...el.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        Shuai Xue <xueshuai@...ux.alibaba.com>
Subject: RE: [PATCH v2] mm, hwpoison: Try to recover from copy-on write faults

>> +	INIT_WORK(&p->work, do_sched_memory_failure);
>> +	p->pfn = pfn;
>> +	schedule_work(&p->work);
>
> There is already memory_failure_queue() that can do this. Can we use it directly?

Miaohe Lin,

Yes, can use that. A thousand thanks for pointing it out. I just tried it, and it works
perfectly.

I think I'll need to add an empty stub version for the CONFIG_MEMORY_FAILURE=n
build. But that's trivial.

-Tony