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Anshuman Khandual authored
Patch series "mm/debug_vm_pgtable: Add some more tests", v5. This series adds some more arch page table helper validation tests which are related to core and advanced memory functions. This also creates a documentation, enlisting expected semantics for all page table helpers as suggested by Mike Rapoport previously (https://lkml.org/lkml/2020/1/30/40). There are many TRANSPARENT_HUGEPAGE and ARCH_HAS_TRANSPARENT_HUGEPAGE_PUD ifdefs scattered across the test. But consolidating all the fallback stubs is not very straight forward because ARCH_HAS_TRANSPARENT_HUGEPAGE_PUD is not explicitly dependent on ARCH_HAS_TRANSPARENT_HUGEPAGE. Tested on arm64, x86 platforms but only build tested on all other enabled platforms through ARCH_HAS_DEBUG_VM_PGTABLE i.e powerpc, arc, s390. The following failure on arm64 still exists which was mentioned previously. It will be fixed with the upcoming THP migration on arm64 enablement series. WARNING .... mm/debug_vm_pgtable.c:860 debug_vm_pgtable+0x940/0xa54 WARN_ON(!pmd_present(pmd_mkinvalid(pmd_mkhuge(pmd)))) This patch (of 4): This adds new tests validating arch page table helpers for these following core memory features. These tests create and test specific mapping types at various page table levels. 1. SPECIAL mapping 2. PROTNONE mapping 3. DEVMAP mapping 4. SOFTDIRTY mapping 5. SWAP mapping 6. MIGRATION mapping 7. HUGETLB mapping 8. THP mapping Suggested-by:
Catalin Marinas <catalin.marinas@arm.com> Signed-off-by:
Anshuman Khandual <anshuman.khandual@arm.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Tested-by: Vineet Gupta <vgupta@synopsys.com> [arc] Reviewed-by:
Zi Yan <ziy@nvidia.com> Cc: Mike Rapoport <rppt@linux.ibm.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Kirill A. Shutemov <kirill@shutemov.name> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Mike Rapoport <rppt@kernel.org> Cc: Steven Price <steven.price@arm.com> Link: http://lkml.kernel.org/r/1594610587-4172-1-git-send-email-anshuman.khandual@arm.com Link: http://lkml.kernel.org/r/1593996516-7186-1-git-send-email-anshuman.khandual@arm.com Link: http://lkml.kernel.org/r/1593996516-7186-2-git-send-email-anshuman.khandual@arm.comSigned-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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