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AJvYcCWSxm1xUUs1N7syHU+jJFkLuvbYRR2O4g0Meqo61cIofwTIjCk+vgvbMU3vVLK7PcA9s6foaT5ZIc65rGw=@vger.kernel.org X-Gm-Message-State: AOJu0Yx3otPVpWoSRQ0kooMXhZxm+qR7H3zvx/23X1rNLSRbj7sr7RwI RxaqSuxFXMbqVX17KF/i7ZJRifWOxhqbCkhRPv1JsyXceIc4qbrmYY5+9So9biaKPRD4QlI1FVT 6SkVlKahkC2ZmxQ== X-Received: from plblf5.prod.google.com ([2002:a17:902:fb45:b0:2a0:fb2a:79f0]) (user=jiaqiyan job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:283:b0:29f:1fad:8e50 with SMTP id d9443c01a7336-2a8d959c8abmr134229505ad.3.1770061292645; Mon, 02 Feb 2026 11:41:32 -0800 (PST) Date: Mon, 2 Feb 2026 19:41:24 +0000 In-Reply-To: <20260202194125.2191216-1-jiaqiyan@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260202194125.2191216-1-jiaqiyan@google.com> X-Mailer: git-send-email 2.53.0.rc1.225.gd81095ad13-goog Message-ID: <20260202194125.2191216-3-jiaqiyan@google.com> Subject: [PATCH v4 2/3] mm/memory-failure: set has_hwpoisoned flags on dissolved 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, boudewijn@delta-utec.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), 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 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 c80c2907da333..529a83a325740 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 2.53.0.rc2.204.g2597b5adb4-goog