linux-kernel - Re: [PATCH v3 5/5] mm/memory-failure: send SIGBUS in the event of thp split fail

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Message-ID: <Zk5cJJTFek9yzDh5@localhost.localdomain>
Date: Wed, 22 May 2024 22:57:08 +0200
From: Oscar Salvador <osalvador@...e.de>
To: Jane Chu <jane.chu@...cle.com>
Cc: linmiaohe@...wei.com, nao.horiguchi@...il.com,
	akpm@...ux-foundation.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 5/5] mm/memory-failure: send SIGBUS in the event of
 thp split fail

On Tue, May 21, 2024 at 05:54:29PM -0600, Jane Chu wrote:
> While handling hwpoison in a THP page, it is possible that
> try_to_split_thp_page() fails. For example, when the THP page has
> been RDMA pinned. At this point, the kernel cannot isolate the
> poisoned THP page, all it could do is to send a SIGBUS to the user
> process with meaningful payload to give user-level recovery a chance.
> 
> Signed-off-by: Jane Chu <jane.chu@...cle.com>

Reviewed-by: Oscar Salvador <osalvador@...e.de>


-- 
Oscar Salvador
SUSE Labs