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AFNElJ/sSrfY1qQ8uQ/4zf62BQmcDFsOXl1CmpjZCdB8P2JY1Af+0s5OlMQ3Xg1OF48Y/TGHjFOUccguOKApw6I=@vger.kernel.org X-Gm-Message-State: AOJu0Yx22glUgNqQIGAThGgOQCFjpQkA2qyz9E2OYisVJQqIO3GbjVwC DgsCHCwIG2vqgEX/s69gPVq5d3I1Om3AwelX84MeTpTLUbQ793kZTY5aoyTaaip/dK2yJNERxHc SWrubT7QUpXq+6Q== X-Received: from plgy12.prod.google.com ([2002:a17:903:22cc:b0:2b2:4713:9ce4]) (user=jiaqiyan job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:ce85:b0:2bd:4d4b:9143 with SMTP id d9443c01a7336-2bf36795110mr71007705ad.8.1780207113952; Sat, 30 May 2026 22:58:33 -0700 (PDT) Date: Sun, 31 May 2026 05:58:27 +0000 In-Reply-To: <20260531055829.3636554-1-jiaqiyan@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260531055829.3636554-1-jiaqiyan@google.com> X-Mailer: git-send-email 2.54.0.823.g6e5bcc1fc9-goog Message-ID: <20260531055829.3636554-3-jiaqiyan@google.com> Subject: [PATCH v5 2/4] mm/memory-failure: set has_hwpoisoned flags on dissolved HugeTLB folio From: Jiaqi Yan To: ljs@kernel.org, linmiaohe@huawei.com, osalvador@kernel.org, ziy@nvidia.com, harry.yoo@oracle.com, willy@infradead.org Cc: osalvador@suse.de, lorenzo.stoakes@oracle.com, jackmanb@google.com, hannes@cmpxchg.org, nao.horiguchi@gmail.com, david@kernel.org, william.roche@oracle.com, tony.luck@intel.com, wangkefeng.wang@huawei.com, jane.chu@oracle.com, akpm@linux-foundation.org, muchun.song@linux.dev, liam@infradead.org, rientjes@google.com, duenwen@google.com, jthoughton@google.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, vbabka@suse.cz, rppt@kernel.org, shuah@kernel.org, surenb@google.com, mhocko@suse.com, boudewijn@delta-utec.com, Jiaqi Yan Content-Type: text/plain; charset="UTF-8" When a free HWPoison HugeTLB folio is dissolved, it becomes non-HugeTLB and is released to buddy allocator as a high-order folio. Set has_hwpoisoned flags on the high-order folio so that buddy allocator can tell that it contains certain HWPoison page(s), and can handle it specially with free_has_hwpoisoned(). Signed-off-by: Jiaqi Yan --- include/linux/page-flags.h | 2 +- mm/memory-failure.c | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index 7223f6f4e2b4..223ec3b2d62f 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -893,7 +893,7 @@ static inline int PageTransCompound(const struct page *page) TESTPAGEFLAG_FALSE(TransCompound, transcompound) #endif -#if defined(CONFIG_MEMORY_FAILURE) && defined(CONFIG_TRANSPARENT_HUGEPAGE) +#if defined(CONFIG_MEMORY_FAILURE) && (defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLB_PAGE)) /* * PageHasHWPoisoned indicates that at least one subpage is hwpoisoned in the * compound page. diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 51508a55c405..95979b7995c1 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1951,6 +1951,7 @@ void folio_clear_hugetlb_hwpoison(struct folio *folio) if (folio_test_hugetlb_vmemmap_optimized(folio)) return; folio_clear_hwpoison(folio); + folio_set_has_hwpoisoned(folio); folio_free_raw_hwp(folio, true); } -- 2.54.0.823.g6e5bcc1fc9-goog