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| author | David Hildenbrand <david@redhat.com> | 2025-06-17 16:35:32 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-07-06 11:04:13 +0200 |
| commit | 80e35ada82e0d1f6a3cc40979d636d28a37d997e (patch) | |
| tree | c2626f94865f123dc50bd07a2290e10ce16f817e /tools/perf/scripts/python/gecko.py | |
| parent | 79b97ce42c92251899e3202a2ffd55b883c937a3 (diff) | |
fs/proc/task_mmu: fix PAGE_IS_PFNZERO detection for the huge zero folio
commit 4a5e85f4eb8fd18b1266342d100e4f0849544ca0 upstream.
is_zero_pfn() does not work for the huge zero folio. Fix it by using
is_huge_zero_pmd().
This can cause the PAGEMAP_SCAN ioctl against /proc/pid/pagemap to
present pages as PAGE_IS_PRESENT rather than as PAGE_IS_PFNZERO.
Found by code inspection.
Link: https://lkml.kernel.org/r/20250617143532.2375383-1-david@redhat.com
Fixes: 52526ca7fdb9 ("fs/proc/task_mmu: implement IOCTL to get and optionally clear info about PTEs")
Signed-off-by: David Hildenbrand <david@redhat.com>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/gecko.py')
0 files changed, 0 insertions, 0 deletions