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Mon, 17 Jun 2024 16:16:51 +0800 Subject: Re: [PATCH v2 1/3] mm/memory-failure: userspace controls soft-offlining pages To: Oscar Salvador , Jiaqi Yan , Lance Yang CC: , , , , , , , , , , , References: <20240611215544.2105970-1-jiaqiyan@google.com> <20240611215544.2105970-2-jiaqiyan@google.com> <786a08ff-aa7e-49d5-f589-0a405c7e1a34@huawei.com> From: Miaohe Lin Message-ID: <8faf45d3-0722-2b9e-f641-9d081aad5a82@huawei.com> Date: Mon, 17 Jun 2024 16:16:51 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.173.127.72] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To canpemm500002.china.huawei.com (7.192.104.244) X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 14FFCC000F X-Stat-Signature: n36bep9ryqh7pj7jdywi5urxy391e7ma X-HE-Tag: 1718612216-986284 X-HE-Meta: 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 VThrKsI6 WqRQb8NAeUhICYuYUEVlYcOnNf33Qudg6DVDOe2564mhZ4/uSJiahJxor17++31wBMJv03TEx58lJTHSO9fSD7AAPpKkdPs4g0Y04DOP5F/2wtv/QLVDYWF/wKXxNmCJcSgG4GR5hR7xenZsKcR1tCbwS3j63shpHH4bkowWUPAkOY1n6vpfpU7WyxybSE7JDtu4Ahjj1EETCD8k= 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 2024/6/17 15:51, Oscar Salvador wrote: > On 2024-06-17 09:31, Miaohe Lin wrote: > >> IMHO, it might not be suitable to use EAGAIN. Because it means >> "Resource temporarily unavailable" and >> this can be solved by simply retry later without any further actions >> taken. But I might be wrong. > > We usually use 'EOPNOTSUPP' when we fail due to a setting not being set. > EPERM is more for a capability matter. Thanks Oscar. So we should return EOPNOTSUPP here. Thanks. .