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AHgh+Rq7tLmTVt4SqTxboPQKcoZjEqx8AyA80jl4WCgX1Gf6T+uRIf8Oj82Qn2f4gkxoY4DCDvQOUBanEljPwAs=@vger.kernel.org X-Gm-Message-State: AOJu0YyyfIvp6etb578tYGrF/BDYQHRLVFUjfEJlgvd62TP6i4vJdZ3Y 5Dig9izlkM5+oiUoQTOcqWgDg6O384zmPWbNNBwD1d6IT0ydiRz80CEQMpI1YENIc4cOg9SwzPc 6lYkzZsmHX6vvrQ== X-Received: from plblo12.prod.google.com ([2002:a17:903:434c:b0:2ca:d98d:e037]) (user=jiaqiyan job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:ce12:b0:2ca:ed57:8586 with SMTP id d9443c01a7336-2cbb9eb40dfmr69811215ad.23.1783274839411; Sun, 05 Jul 2026 11:07:19 -0700 (PDT) Date: Sun, 5 Jul 2026 18:07:12 +0000 In-Reply-To: <20260705180714.3708947-1-jiaqiyan@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260705180714.3708947-1-jiaqiyan@google.com> X-Mailer: git-send-email 2.55.0.rc0.799.gd6f94ed593-goog Message-ID: <20260705180714.3708947-4-jiaqiyan@google.com> Subject: [PATCH v6 3/5] mm/memory-failure: set has_hwpoisoned flags on dissolved HugeTLB folio From: Jiaqi Yan To: linmiaohe@huawei.com, ljs@kernel.org, ziy@nvidia.com, vbabka@kernel.org Cc: osalvador@kernel.org, harry.yoo@oracle.com, willy@infradead.org, osalvador@suse.de, 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 Acked-by: Miaohe Lin --- 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 7a863572adce..3cd524e04a30 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -879,7 +879,7 @@ FOLIO_FLAG_FALSE(partially_mapped) #define PG_head_mask ((1UL << PG_head)) -#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 4916ab145325..3d15b4c1b694 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -2008,6 +2008,7 @@ 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); } -- 2.55.0.rc0.799.gd6f94ed593-goog