From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DECD22E2DD2; Thu, 15 Jan 2026 20:05:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768507517; cv=none; b=Km92HHgyVcegSJ+LAiBUKFcfzTJiHeLhie1Ok4gQEXtzA/Y/v1cZK9tATaA3m2q9wrPY8J72zj1WNomy7rZJr5AnAakOwdh/m3gikQNHJ2yVq3fw77aQz1TpilUWywdvRK1M9jYlIOwg482FybjnB9GNsyp9WgNotwucbc/LgMY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768507517; c=relaxed/simple; bh=lQjunlFmWyMO2lfyt6MHYKOuxFN86jW9uoYrdok36A8=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=jIDVOpDs/ItQAF4RIVRPHB4EyHq0Zc4krPZMfYALZepDqOZoGuovbY9f4SdVf13Sjqmgh+z0YdhtBs6csY2FOqJIoBNrk3nKYe8H/wCayg1Xa/okVSaFF/fgCL5k+Nu1M2SewjmMkSyDcf/pZ2C7tOK+m4oOCY14brYt6+VCkFI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZTa8MIJd; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ZTa8MIJd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E28F2C116D0; Thu, 15 Jan 2026 20:04:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768507516; bh=lQjunlFmWyMO2lfyt6MHYKOuxFN86jW9uoYrdok36A8=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=ZTa8MIJdGFVQHgLEluZ/7czewla0UppxdIHdajnxQJ86ydTVGfwKSu4XthtERI+Vz S7jrcXlBas27eS2MD4ilzRDMMXPl6T6E9jYdkN/V3bG/5qyCeBpbvRRFaNhMqR87Hm yrOWl7tr7bFwfCbSmttXaEGvHuYhAhBIYs9iTNdkypXcZ/3ehKbdUJ5MQS1tZScIOZ Lz9G5U6aHuy7cuX5bsreQjYhVzcGgutkYcdoBCPkgmmWwt3c+xpapY6koSIGNeH02C QufrTuCkot6ZMrQ56wj3oSRSVREgueyuJyGpm1FzrzpV7YI01LIlEB9EnK1pBzpzlg IStbdOwUJqRaA== Message-ID: Date: Thu, 15 Jan 2026 21:04:53 +0100 Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v9 02/13] mm/gup: drop secretmem optimization from gup_fast_folio_allowed To: "Kalyazin, Nikita" , "kvm@vger.kernel.org" , "linux-doc@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "kvmarm@lists.linux.dev" , "linux-fsdevel@vger.kernel.org" , "linux-mm@kvack.org" , "bpf@vger.kernel.org" , "linux-kselftest@vger.kernel.org" , "kernel@xen0n.name" , "linux-riscv@lists.infradead.org" , "linux-s390@vger.kernel.org" , "loongarch@lists.linux.dev" Cc: "pbonzini@redhat.com" , "corbet@lwn.net" , "maz@kernel.org" , "oupton@kernel.org" , "joey.gouly@arm.com" , "suzuki.poulose@arm.com" , "yuzenghui@huawei.com" , "catalin.marinas@arm.com" , "will@kernel.org" , "seanjc@google.com" , "tglx@linutronix.de" , "mingo@redhat.com" , "bp@alien8.de" , "dave.hansen@linux.intel.com" , "x86@kernel.org" , "hpa@zytor.com" , "luto@kernel.org" , "peterz@infradead.org" , "willy@infradead.org" , "akpm@linux-foundation.org" , "lorenzo.stoakes@oracle.com" , "Liam.Howlett@oracle.com" , "vbabka@suse.cz" , "rppt@kernel.org" , "surenb@google.com" , "mhocko@suse.com" , "ast@kernel.org" , "daniel@iogearbox.net" , "andrii@kernel.org" , "martin.lau@linux.dev" , "eddyz87@gmail.com" , "song@kernel.org" , "yonghong.song@linux.dev" , "john.fastabend@gmail.com" , "kpsingh@kernel.org" , "sdf@fomichev.me" , "haoluo@google.com" , "jolsa@kernel.org" , "jgg@ziepe.ca" , "jhubbard@nvidia.com" , "peterx@redhat.com" , "jannh@google.com" , "pfalcato@suse.de" , "shuah@kernel.org" , "riel@surriel.com" , "ryan.roberts@arm.com" , "jgross@suse.com" , "yu-cheng.yu@intel.com" , "kas@kernel.org" , "coxu@redhat.com" , "kevin.brodsky@arm.com" , "ackerleytng@google.com" , "maobibo@loongson.cn" , "prsampat@amd.com" , "mlevitsk@redhat.com" , "jmattson@google.com" , "jthoughton@google.com" , "agordeev@linux.ibm.com" , "alex@ghiti.fr" , "aou@eecs.berkeley.edu" , "borntraeger@linux.ibm.com" , "chenhuacai@kernel.org" , "dev.jain@arm.com" , "gor@linux.ibm.com" , "hca@linux.ibm.com" , "Jonathan.Cameron@huawei.com" , "palmer@dabbelt.com" , "pjw@kernel.org" , "shijie@os.amperecomputing.com" , "svens@linux.ibm.com" , "thuth@redhat.com" , "wyihan@google.com" , "yang@os.amperecomputing.com" , "vannapurve@google.com" , "jackmanb@google.com" , "aneesh.kumar@kernel.org" , "patrick.roy@linux.dev" , "Thomson, Jack" , "Itazuri, Takahiro" , "Manwaring, Derek" , "Cali, Marco" References: <20260114134510.1835-1-kalyazin@amazon.com> <20260114134510.1835-3-kalyazin@amazon.com> From: "David Hildenbrand (Red Hat)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 1/14/26 14:45, Kalyazin, Nikita wrote: > From: Patrick Roy > > This drops an optimization in gup_fast_folio_allowed() where > secretmem_mapping() was only called if CONFIG_SECRETMEM=y. secretmem is > enabled by default since commit b758fe6df50d ("mm/secretmem: make it on > by default"), so the secretmem check did not actually end up elided in > most cases anymore anyway. > > This is in preparation of the generalization of handling mappings where > direct map entries of folios are set to not present. Currently, > mappings that match this description are secretmem mappings > (memfd_secret()). Later, some guest_memfd configurations will also fall > into this category. > > Signed-off-by: Patrick Roy > Acked-by: Vlastimil Babka > Signed-off-by: Nikita Kalyazin Acked-by: David Hildenbrand (Red Hat) -- Cheers David