linux-kernel - Re: [PATCH 3/3] mm/memory-failure: send SIGBUS in the event of thp split fail

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Message-ID: <2e51deff-24ca-32d5-dbd2-9077f860723c@huawei.com>
Date: Wed, 8 May 2024 17:03:19 +0800
From: Miaohe Lin <linmiaohe@...wei.com>
To: Jane Chu <jane.chu@...cle.com>, <nao.horiguchi@...il.com>,
	<akpm@...ux-foundation.org>, <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] mm/memory-failure: send SIGBUS in the event of thp
 split fail

On 2024/5/2 7:24, Jane Chu wrote:
> When handle hwpoison in a GUP longterm pin'ed thp page,
> try_to_split_thp_page() will fail. And at this point, there is little else
> the kernel could do except sending a SIGBUS to the user process, thus
> give it a chance to recover.

It seems the user process will still receive SIGBUS via kill_accessing_process()
when (re-)access thp later. So they should have a chance to recover already.
Or am I miss something?

Thanks.
.