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AJvYcCXzWMFtEpx83QIAfrHL1hvwf7Fi7MXkELd+zlfEW0Z3Otc5QiifPOCm3hNGjrSSwXWa3OufU9kUk/VbbJY=@vger.kernel.org X-Gm-Message-State: AOJu0YzIY0tVr+le5SUEQkpQRgDSob8QtwIhngGS63LjOGrqbXlq6yfn cZG8Vs5HDgwLEnTRxQn62JTe2nhH2SwBgxIkI8F8YwyZd5j5cBvzcT1Dej2KQNF/17VSr5rHvKr O9TpwmS9QpVbSuA== X-Google-Smtp-Source: AGHT+IEzOjUKHHk546qLMa+fb+TkJDXbIwoDrKmpkBwNwz83aSZlApmXkbT2tXI+flv4Y4MXC/eUiYjM/ow/+g== X-Received: from pgjz22.prod.google.com ([2002:a63:e556:0:b0:bac:6acd:818a]) (user=jiaqiyan job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a20:9149:b0:353:110e:9b89 with SMTP id adf61e73a8af0-376a9acef57mr4054062637.49.1766169239272; Fri, 19 Dec 2025 10:33:59 -0800 (PST) Date: Fri, 19 Dec 2025 18:33:44 +0000 In-Reply-To: <20251219183346.3627510-1-jiaqiyan@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251219183346.3627510-1-jiaqiyan@google.com> X-Mailer: git-send-email 2.52.0.322.g1dd061c0dc-goog Message-ID: <20251219183346.3627510-2-jiaqiyan@google.com> Subject: [PATCH v2 1/3] mm/memory-failure: set has_hwpoisoned flags on HugeTLB folio From: Jiaqi Yan To: jackmanb@google.com, hannes@cmpxchg.org, linmiaohe@huawei.com, ziy@nvidia.com, harry.yoo@oracle.com, willy@infradead.org Cc: 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, Jiaqi Yan Content-Transfer-Encoding: quoted-printable 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). This is a prepare change for buddy allocator to handle only the high-order HWPoison folio differently. This cannot be done with hwpoison flag because users cannot tell from the case that the page with hwpoison is hardware corrupted. 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 f7a0e4af0c734..d13835e265952 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -904,7 +904,7 @@ static inline int PageTransCompound(const struct page *= page) TESTPAGEFLAG_FALSE(TransCompound, transcompound) #endif =20 -#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 fbc5a01260c89..d204de6c9792a 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1952,6 +1952,7 @@ 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); } =20 --=20 2.52.0.322.g1dd061c0dc-goog