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Let's test whether R/O long-term pinning is reliable for non-anonymous memory: when R/O long-term pinning a page, the expectation is that we break COW early before pinning, such that actual write access via the page tables won't break COW later and end up replacing the R/O-pinned page in the page table. Consequently, R/O long-term pinning in private mappings would only target exclusive anonymous pages. For now, all tests fail: # [RUN] R/O longterm GUP pin ... with shared zeropage not ok 151 Longterm R/O pin is reliable # [RUN] R/O longterm GUP pin ... with memfd not ok 152 Longterm R/O pin is reliable # [RUN] R/O longterm GUP pin ... with tmpfile not ok 153 Longterm R/O pin is reliable # [RUN] R/O longterm GUP pin ... with huge zeropage not ok 154 Longterm R/O pin is reliable # [RUN] R/O longterm GUP pin ... with memfd hugetlb (2048 kB) not ok 155 Longterm R/O pin is reliable # [RUN] R/O longterm GUP pin ... with memfd hugetlb (1048576 kB) not ok 156 Longterm R/O pin is reliable # [RUN] R/O longterm GUP-fast pin ... with shared zeropage not ok 157 Longterm R/O pin is reliable # [RUN] R/O longterm GUP-fast pin ... with memfd not ok 158 Longterm R/O pin is reliable # [RUN] R/O longterm GUP-fast pin ... with tmpfile not ok 159 Longterm R/O pin is reliable # [RUN] R/O longterm GUP-fast pin ... with huge zeropage not ok 160 Longterm R/O pin is reliable # [RUN] R/O longterm GUP-fast pin ... with memfd hugetlb (2048 kB) not ok 161 Longterm R/O pin is reliable # [RUN] R/O longterm GUP-fast pin ... with memfd hugetlb (1048576 kB) not ok 162 Longterm R/O pin is reliable Link: https://lkml.kernel.org/r/20221116102659.70287-4-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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| .. | ||
| .gitignore | ||
| charge_reserved_hugetlb.sh | ||
| check_config.sh | ||
| compaction_test.c | ||
| config | ||
| cow.c | ||
| gup_test.c | ||
| hmm-tests.c | ||
| hugepage-mmap.c | ||
| hugepage-mremap.c | ||
| hugepage-shm.c | ||
| hugepage-vmemmap.c | ||
| hugetlb_reparenting_test.sh | ||
| hugetlb-madvise.c | ||
| khugepaged.c | ||
| ksm_tests.c | ||
| madv_populate.c | ||
| Makefile | ||
| map_fixed_noreplace.c | ||
| map_hugetlb.c | ||
| map_populate.c | ||
| memfd_secret.c | ||
| migration.c | ||
| mlock2-tests.c | ||
| mlock2.h | ||
| mlock-random-test.c | ||
| mrelease_test.c | ||
| mremap_dontunmap.c | ||
| mremap_test.c | ||
| on-fault-limit.c | ||
| pkey-helpers.h | ||
| pkey-powerpc.h | ||
| pkey-x86.h | ||
| protection_keys.c | ||
| run_vmtests.sh | ||
| settings | ||
| soft-dirty.c | ||
| split_huge_page_test.c | ||
| test_hmm.sh | ||
| test_vmalloc.sh | ||
| thuge-gen.c | ||
| transhuge-stress.c | ||
| userfaultfd.c | ||
| util.h | ||
| va_128TBswitch.c | ||
| va_128TBswitch.sh | ||
| virtual_address_range.c | ||
| vm_util.c | ||
| vm_util.h | ||
| write_hugetlb_memory.sh | ||
| write_to_hugetlbfs.c | ||