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Wed, 22 May 2024 20:57:10 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id y/o1ACZcTmYHagAAD6G6ig (envelope-from ); Wed, 22 May 2024 20:57:09 +0000 Date: Wed, 22 May 2024 22:57:08 +0200 From: Oscar Salvador To: Jane Chu Cc: linmiaohe@huawei.com, nao.horiguchi@gmail.com, akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 5/5] mm/memory-failure: send SIGBUS in the event of thp split fail Message-ID: References: <20240521235429.2368017-1-jane.chu@oracle.com> <20240521235429.2368017-6-jane.chu@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240521235429.2368017-6-jane.chu@oracle.com> X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 07950140005 X-Stat-Signature: jaczq49y93hipxb76tmeoe1fzp8pprqu X-Rspam-User: X-HE-Tag: 1716411431-126206 X-HE-Meta: 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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 Reviewed-by: Oscar Salvador -- Oscar Salvador SUSE Labs