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Howlett" , Aniket Agashe , Vikram Sethi , Matt Ochs , Shameer Kolothum , "linmiaohe@huawei.com" , "nao.horiguchi@gmail.com" , "akpm@linux-foundation.org" , "david@redhat.com" , "lorenzo.stoakes@oracle.com" , "vbabka@suse.cz" , "rppt@kernel.org" , "surenb@google.com" , "mhocko@suse.com" , "tony.luck@intel.com" , "bp@alien8.de" , "rafael@kernel.org" , "guohanjun@huawei.com" , "mchehab@kernel.org" , "lenb@kernel.org" , "kevin.tian@intel.com" , "alex@shazbot.org" , Neo Jia , Kirti Wankhede , "Tarun Gupta (SW-GPU)" , Zhi Wang , Dheeraj Nigam , Krishnakant Jaju , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "linux-edac@vger.kernel.org" , "Jonathan.Cameron@huawei.com" , "ira.weiny@intel.com" , "Smita.KoralahalliChannabasappa@amd.com" , "u.kleine-koenig@baylibre.com" , "peterz@infradead.org" , "linux-acpi@vger.kernel.org" , "kvm@vger.kernel.org" Subject: Re: [PATCH v3 0/3] mm: Implement ECC handling for pfn with no struct page Thread-Topic: [PATCH v3 0/3] mm: Implement ECC handling for pfn with no struct page Thread-Index: AQHcQnTHTYvFr6s4LEeMxWxMZV3yCrTMyzMAgAAD5QCAACQpAIAAPsYAgAP34AM= Date: Fri, 24 Oct 2025 11:16:34 +0000 Message-ID: References: <20251021102327.199099-1-ankita@nvidia.com> <20251021164444.GB699957@nvidia.com> <3ss3epklrmwallhd3nih5qqzjk53dcgns5igudtsg4vnnyjyri@ektyavsup6wk> <20251021223850.GA21107@nvidia.com> In-Reply-To: <20251021223850.GA21107@nvidia.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: msip_labels: x-ms-publictraffictype: Email x-ms-traffictypediagnostic: SA1PR12MB7199:EE_|DM6PR12MB4138:EE_ x-ms-office365-filtering-correlation-id: 16bb60a7-6381-438a-1f47-08de12eecafa x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0;ARA:13230040|366016|7416014|376014|1800799024|38070700021|921020; 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SA1PR12MB7199.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 16bb60a7-6381-438a-1f47-08de12eecafa X-MS-Exchange-CrossTenant-originalarrivaltime: 24 Oct 2025 11:16:34.9630 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: aCJiuVjfYaTEOX9wPBssbhA/uoh0EUcCxsbRdtZycWpd6QxtDoN7fv4VMentpy/d+ASkbSJdF3GKj2ltv+HeJg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4138 X-Stat-Signature: ncqrpepo6ujo8r5n9yeg74b8b365srmo X-Rspamd-Queue-Id: F059940004 X-Rspamd-Server: rspam06 X-Rspam-User: X-HE-Tag: 1761304598-706195 X-HE-Meta: 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 CabQdhDl 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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: >>=0A= >> Ah, I see.=A0 Seems like a worthy addition to the commit message?=A0 I m= ean,=0A= >> this is really a choice of throwing away memory for the benefit of tlb= =0A= >> performance.=A0 Seems like a valid choice in your usecase but less so fo= r=0A= >> the average laptop.=0A= >=0A= > No memory is being thrown away, the choice is if the kernel will=0A= > protect itself from loading via userspace issuing repeated reads to=0A= > bad memory.=0A= >=0A= > Ankit please include some of these details in the commit message=0A= =0A= Thanks Jason, Liam for the suggestion. I'll update the commit message=0A= in the next version.=0A=