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Mon, 17 Jun 2024 07:51:01 +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 fIY0D+Xqb2byVQAAD6G6ig (envelope-from ); Mon, 17 Jun 2024 07:51:01 +0000 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Mon, 17 Jun 2024 09:51:01 +0200 From: Oscar Salvador To: Miaohe Lin Cc: Jiaqi Yan , nao.horiguchi@gmail.com, jane.chu@oracle.com, muchun.song@linux.dev, akpm@linux-foundation.org, shuah@kernel.org, corbet@lwn.net, rientjes@google.com, duenwen@google.com, fvdl@google.com, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org, Lance Yang Subject: Re: [PATCH v2 1/3] mm/memory-failure: userspace controls soft-offlining pages In-Reply-To: <786a08ff-aa7e-49d5-f589-0a405c7e1a34@huawei.com> References: <20240611215544.2105970-1-jiaqiyan@google.com> <20240611215544.2105970-2-jiaqiyan@google.com> <786a08ff-aa7e-49d5-f589-0a405c7e1a34@huawei.com> User-Agent: Roundcube Webmail Message-ID: X-Sender: osalvador@suse.de Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -2.79 X-Spam-Level: X-Spam-Flag: NO X-Spamd-Result: default: False [-2.79 / 50.00]; BAYES_HAM(-3.00)[99.99%]; SUSPICIOUS_RECIPS(1.50)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; XM_UA_NO_VERSION(0.01)[]; RCVD_TLS_ALL(0.00)[]; TAGGED_RCPT(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; RCVD_VIA_SMTP_AUTH(0.00)[]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_HAS_DN(0.00)[]; FREEMAIL_CC(0.00)[google.com,gmail.com,oracle.com,linux.dev,linux-foundation.org,kernel.org,lwn.net,kvack.org,vger.kernel.org]; RCPT_COUNT_TWELVE(0.00)[15]; FROM_EQ_ENVFROM(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; TO_DN_SOME(0.00)[] 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. -- Oscar Salvador SUSE Labs