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Received: from willy by casper.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vXo8n-0000000CFGM-0cch; Mon, 22 Dec 2025 22:12:33 +0000 Date: Mon, 22 Dec 2025 22:12:32 +0000 From: Matthew Wilcox To: Jiaqi Yan Cc: jackmanb@google.com, hannes@cmpxchg.org, linmiaohe@huawei.com, ziy@nvidia.com, harry.yoo@oracle.com, nao.horiguchi@gmail.com, david@redhat.com, lorenzo.stoakes@oracle.com, william.roche@oracle.com, tony.luck@intel.com, wangkefeng.wang@huawei.com, jane.chu@oracle.com, akpm@linux-foundation.org, osalvador@suse.de, muchun.song@linux.dev, rientjes@google.com, duenwen@google.com, jthoughton@google.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com Subject: Re: [PATCH v2 3/3] mm/memory-failure: simplify __page_handle_poison Message-ID: References: <20251219183346.3627510-1-jiaqiyan@google.com> <20251219183346.3627510-4-jiaqiyan@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251219183346.3627510-4-jiaqiyan@google.com> X-Rspamd-Server: rspam02 X-Stat-Signature: 55zc1ishak8so3oirzwmxm3exedywhbf X-Rspam-User: X-Rspamd-Queue-Id: 20BEE20010 X-HE-Tag: 1766441564-121320 X-HE-Meta: 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 P8DtiQfc V+GaFGY1yC5VY3QJhjcXPpj6m37Trr2icGoD27nR/lHf2O+YFkGuREnyMgynML1HBuLlTTomESdsrO1rebhdSXyBDlHTc7D8/4+DBbiP91Mpo+U+lA2vYD/gXa3QDZBd6DzdrJjmeDgR/bvyo9ponBmae1m/9wDCznmbzkhUC3Lot54hKRiF56B4kaIcZ1wnxxcSKlsVM6TFzEsIe4OaWu0RIvaEI2Sb0oG7TUZQd7eIbMh4FDSOzQUu3ua6Y7bAZWpCeMEmEqkXqa/5XBA01zla4ZyPXvzpENDhXyFI/9L+lyNHdEGuH3X7CPUjVLNLaD2pYuRGpNIeDckmTjNcfWDwAx0z9ouhQi1LilDeZ+MYcgb+ij+BtL53B6A== 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 Fri, Dec 19, 2025 at 06:33:46PM +0000, Jiaqi Yan wrote: > Now that no HWPoison page will be given away to buddy allocator > at the end of dissolve_free_hugetlb_folio, there is no need to > drain_all_pages and take_page_off_buddy anymore, so remove them. What if we discover a hardware error in a page which is currently in the buddy system? Why don't we need to remove that page from the buddy system?