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From: Muchun Song In-Reply-To: <20241201010341.1382431-1-dafna.hirschfeld@intel.com> Date: Mon, 2 Dec 2024 11:49:01 +0800 Cc: linux-mm@kvack.org, akpm@linux-foundation.org, willy@infradead.org Content-Transfer-Encoding: quoted-printable Message-Id: References: <20241201010341.1382431-1-dafna.hirschfeld@intel.com> To: Dafna Hirschfeld X-Migadu-Flow: FLOW_OUT X-Rspamd-Queue-Id: F1913140016 X-Stat-Signature: 389eh4freikyuq9no5ps7b3d5hbnakob X-Rspam-User: X-Rspamd-Server: rspam11 X-HE-Tag: 1733111385-898786 X-HE-Meta: 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 6cOwy/ng zPwQOHp5WqU3WR0F0pYJSmWYgxoKWtUOw7IhCa0TpSfMsSFHfvwpXdT7aPaZUkDJv9w9MmCrsqP6EcLnIcFUt9kOfDCO48N/rqjC3RbA1niJqdUAG5k7pApseLHZ0539+hQ8PwfPw1mG6PxW4yYSaF5e+nXiB61xTlGzp29B+A3m3cqOvPxiOxNBHG8tUZJNqdU6EVeuJJXMCDMkcw9euppiofEkjy7lBv+TvM/kVT7Oh9ai5b+lLoHNf3A== 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 Dec 1, 2024, at 09:03, Dafna Hirschfeld = wrote: >=20 > The error ENOSPC is translated in vmf_error to VM_FAULT_SIGBUS which = is > further translated in EFAULT in i.e. pin/get_user_pages. > But when running out of pages/hugepages we expect to see ENOMEM and > not EFAULT. Hi Dafna, Refers to Documentation/mm/hugetlbfs_reserv.rst. I saw: If no huge page exists at page fault time, the task is sent a **SIGBUS** and often dies an unhappy death. Seems SIGBUS is expected since it is introduced. Thanks.=