From: Dev Jain <dev.jain@arm.com>
To: akpm@linux-foundation.org, liam@infradead.org, ljs@kernel.org,
jgg@ziepe.ca, leon@kernel.org, david@kernel.org,
shuah@kernel.org
Cc: Dev Jain <dev.jain@arm.com>,
vbabka@kernel.org, jannh@google.com, pfalcato@suse.de,
balbirs@nvidia.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
rppt@kernel.org, surenb@google.com, mhocko@suse.com,
linux-kselftest@vger.kernel.org, usama.arif@linux.dev,
ryan.roberts@arm.com, anshuman.khandual@arm.com,
stable@vger.kernel.org
Subject: [PATCH v2 1/2] fs/proc/task_mmu: do not warn on seeing non-migration pmd entry
Date: Sat, 30 May 2026 08:54:11 +0000 [thread overview]
Message-ID: <20260530085413.1270139-2-dev.jain@arm.com> (raw)
In-Reply-To: <20260530085413.1270139-1-dev.jain@arm.com>
pagemap_pmd_range_thp() warns if a non-present PMD is not a migration
entry. This became false once device-private entries at the PMD level were
added.
Therefore, remove the stale migration-only assertion.
Fixes: a30b48bf1b24 ("mm/migrate_device: implement THP migration of zone device pages")
Cc: stable@vger.kernel.org
Signed-off-by: Dev Jain <dev.jain@arm.com>
---
fs/proc/task_mmu.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 1e3a15bf46f4e..58938e62154d9 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -2129,7 +2129,6 @@ static int pagemap_pmd_range_thp(pmd_t *pmdp, unsigned long addr,
flags |= PM_SOFT_DIRTY;
if (pmd_swp_uffd_wp(pmd))
flags |= PM_UFFD_WP;
- VM_WARN_ON_ONCE(!pmd_is_migration_entry(pmd));
page = softleaf_to_page(entry);
}
--
2.43.0
next prev parent reply other threads:[~2026-05-30 8:54 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-30 8:54 [PATCH v2 0/2] mm/hmm: A fix and a selftest Dev Jain
2026-05-30 8:54 ` Dev Jain [this message]
2026-05-31 23:39 ` [PATCH v2 1/2] fs/proc/task_mmu: do not warn on seeing non-migration pmd entry Balbir Singh
2026-06-01 8:36 ` Lorenzo Stoakes
2026-05-30 8:54 ` [PATCH v2 2/2] selftests/mm/hmm-tests: test pagemap reads of PMD device-private entries Dev Jain
2026-06-01 0:09 ` Balbir Singh
2026-06-01 5:10 ` Dev Jain
2026-06-01 8:35 ` Lorenzo Stoakes
2026-06-01 9:14 ` Dev Jain
2026-05-31 19:24 ` [PATCH v2 0/2] mm/hmm: A fix and a selftest Andrew Morton
2026-05-31 19:49 ` David Hildenbrand (Arm)
2026-06-01 5:11 ` Dev Jain
2026-06-01 8:33 ` Lorenzo Stoakes
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