From: Anshuman Khandual <anshuman.khandual@arm.com> To: Christophe Leroy <christophe.leroy@c-s.fr>, linux-mm@kvack.org Cc: Jonathan Corbet <corbet@lwn.net>, Andrew Morton <akpm@linux-foundation.org>, Mike Rapoport <rppt@linux.ibm.com>, Vineet Gupta <vgupta@synopsys.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, Michael Ellerman <mpe@ellerman.id.au>, Heiko Carstens <heiko.carstens@de.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>, Christian Borntraeger <borntraeger@de.ibm.com>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, "H. Peter Anvin" <hpa@zytor.com>, "Kirill A . Shutemov" <kirill@shutemov.name>, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-riscv@lists.infradead.org, x86@kernel.org, linux-doc@vger.kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH V2 0/3] mm/debug: Add more arch page table helper tests Date: Fri, 27 Mar 2020 12:16:34 +0530 Message-ID: <9675882f-0ec5-5e46-551f-dd3aa38bf8d8@arm.com> (raw) In-Reply-To: <a46d18ed-8911-1ec3-c32f-58b6e0d959d7@c-s.fr> On 03/26/2020 08:53 PM, Christophe Leroy wrote: > > > Le 26/03/2020 à 03:23, Anshuman Khandual a écrit : >> >> >> On 03/24/2020 10:52 AM, Anshuman Khandual wrote: >>> This series adds more arch page table helper tests. The new tests here are >>> either related to core memory functions and advanced arch pgtable helpers. >>> This also creates a documentation file enlisting all expected semantics as >>> suggested by Mike Rapoport (https://lkml.org/lkml/2020/1/30/40). >>> >>> This series has been tested on arm64 and x86 platforms. >> >> If folks can test these patches out on remaining ARCH_HAS_DEBUG_VM_PGTABLE >> enabled platforms i.e s390, arc, powerpc (32 and 64), that will be really >> appreciated. Thank you. >> > > On powerpc 8xx (PPC32), I get: > > [ 53.338368] debug_vm_pgtable: debug_vm_pgtable: Validating architecture page table helpers > [ 53.347403] ------------[ cut here ]------------ > [ 53.351832] WARNING: CPU: 0 PID: 1 at mm/debug_vm_pgtable.c:647 debug_vm_pgtable+0x280/0x3f4 mm/debug_vm_pgtable.c:647 ? With the following commits in place 53a8338ce (HEAD) Documentation/mm: Add descriptions for arch page table helper 5d4913fc1 mm/debug: Add tests validating arch advanced page table helpers bcaf120a7 mm/debug: Add tests validating arch page table helpers for core features d6ed5a4a5 x86/memory: Drop pud_mknotpresent() 0739d1f8d mm/debug: Add tests validating architecture page table helpers 16fbf79b0 (tag: v5.6-rc7) Linux 5.6-rc7 mm/debug_vm_pgtable.c:647 is here. #ifdef CONFIG_ARCH_ENABLE_THP_MIGRATION static void __init pmd_swap_tests(unsigned long pfn, pgprot_t prot) { swp_entry_t swp; pmd_t pmd; -----------------------------> Line #647 pmd = pfn_pmd(pfn, prot); swp = __pmd_to_swp_entry(pmd); WARN_ON(!pmd_same(pmd, __swp_entry_to_pmd(swp))); } #else static void __init pmd_swap_tests(unsigned long pfn, pgprot_t prot) { } #end Did I miss something ? > [ 53.360140] CPU: 0 PID: 1 Comm: swapper Not tainted 5.6.0-rc7-s3k-dev-01090-g92710e99881f #3544 > [ 53.368718] NIP: c0777c04 LR: c0777bb8 CTR: 00000000 > [ 53.373720] REGS: c9023df0 TRAP: 0700 Not tainted (5.6.0-rc7-s3k-dev-01090-g92710e99881f) > [ 53.382042] MSR: 00029032 <EE,ME,IR,DR,RI> CR: 22000222 XER: 20000000 > [ 53.388667] > [ 53.388667] GPR00: c0777bb8 c9023ea8 c6120000 00000001 1e410000 00000000 00000000 007641c9 > [ 53.388667] GPR08: 00000000 00000001 00000000 ffffffff 82000222 00000000 c00039b8 00000000 > [ 53.388667] GPR16: 00000000 00000000 00000000 fffffff0 065fc000 1e410000 c6600000 000001e4 > [ 53.388667] GPR24: 000001d9 c062d14c c65fc000 c642d448 000006c9 00000000 c65f8000 c65fc040 > [ 53.423400] NIP [c0777c04] debug_vm_pgtable+0x280/0x3f4 > [ 53.428559] LR [c0777bb8] debug_vm_pgtable+0x234/0x3f4 > [ 53.433593] Call Trace: > [ 53.436048] [c9023ea8] [c0777bb8] debug_vm_pgtable+0x234/0x3f4 (unreliable) > [ 53.442936] [c9023f28] [c00039e0] kernel_init+0x28/0x124 > [ 53.448184] [c9023f38] [c000f174] ret_from_kernel_thread+0x14/0x1c > [ 53.454245] Instruction dump: > [ 53.457180] 41a20008 4bea3ed9 62890021 7d36b92e 7d36b82e 71290fd0 3149ffff 7d2a4910 > [ 53.464838] 0f090000 5789077e 3149ffff 7d2a4910 <0f090000> 38c00000 38a00000 38800000 > [ 53.472671] ---[ end trace fd5dd92744dc0065 ]--- Could you please point me to the exact test which is failing ? > [ 53.519778] Freeing unused kernel memory: 608K > > So I assume that the system should have come till runtime just fine apart from the above warning message because.
next prev parent reply index Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-03-24 5:22 Anshuman Khandual 2020-03-24 5:22 ` [PATCH V2 1/3] mm/debug: Add tests validating arch page table helpers for core features Anshuman Khandual 2020-03-24 13:29 ` Zi Yan 2020-03-26 2:18 ` Anshuman Khandual 2020-03-26 17:08 ` Zi Yan 2020-03-30 8:56 ` [mm/debug] f675f2f91d: WARNING:at_mm/debug_vm_pgtable.c:#debug_vm_pgtable kernel test robot 2020-04-05 14:49 ` Anshuman Khandual 2020-03-24 5:22 ` [PATCH V2 2/3] mm/debug: Add tests validating arch advanced page table helpers Anshuman Khandual 2020-03-27 7:41 ` [mm/debug] d157503f6f: WARNING:at_mm/debug_vm_pgtable.c:#debug_vm_pgtable kernel test robot 2020-03-24 5:22 ` [PATCH V2 3/3] Documentation/mm: Add descriptions for arch page table helpers Anshuman Khandual 2020-03-26 2:23 ` [PATCH V2 0/3] mm/debug: Add more arch page table helper tests Anshuman Khandual 2020-03-26 15:23 ` Christophe Leroy 2020-03-27 6:46 ` Anshuman Khandual [this message] 2020-03-27 7:00 ` Christophe Leroy 2020-03-29 14:21 ` Anshuman Khandual 2020-03-31 12:30 ` Gerald Schaefer 2020-04-05 12:28 ` Anshuman Khandual 2020-04-07 15:54 ` Gerald Schaefer 2020-04-08 7:11 ` Anshuman Khandual 2020-04-08 12:15 ` Gerald Schaefer 2020-04-09 1:06 ` Anshuman Khandual
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