diff options
| author | Dave Hansen <dave.hansen@linux.intel.com> | 2025-10-22 11:26:29 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-11-17 04:28:17 +0300 |
| commit | 977870522af34359b461060597ee3a86f27450d6 (patch) | |
| tree | 90d340a286c54bf780bd3c3c1367639bcf2b3a7a /include/linux | |
| parent | 27bfafac65d87c58639f5d7af1353ec1e7886963 (diff) | |
| download | linux-977870522af34359b461060597ee3a86f27450d6.tar.xz | |
mm: actually mark kernel page table pages
Now that the API is in place, mark kernel page table pages just after they
are allocated. Unmark them just before they are freed.
Note: Unconditionally clearing the 'kernel' marking (via
ptdesc_clear_kernel()) would be functionally identical to what is here.
But having the if() makes it logically clear that this function can be
used for kernel and non-kernel page tables.
Link: https://lkml.kernel.org/r/20251022082635.2462433-4-baolu.lu@linux.intel.com
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Betkov <bp@alien8.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jann Horn <jannh@google.com>
Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robin Murohy <robin.murphy@arm.com>
Cc: Thomas Gleinxer <tglx@linutronix.de>
Cc: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
Cc: Vasant Hegde <vasant.hegde@amd.com>
Cc: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Cc: Yi Lai <yi1.lai@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mm.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 5c887c4ea29e..8f46048875a7 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3057,6 +3057,9 @@ static inline void pagetable_free(struct ptdesc *pt) { struct page *page = ptdesc_page(pt); + if (ptdesc_test_kernel(pt)) + ptdesc_clear_kernel(pt); + __free_pages(page, compound_order(page)); } |