Re: [PATCH V14] mm/debug: Add tests validating architecture page table helpers

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Le 26/02/2020 à 15:12, Qian Cai a écrit :
On Wed, 2020-02-26 at 09:09 -0500, Qian Cai wrote:
On Mon, 2020-02-17 at 08:47 +0530, Anshuman Khandual wrote:

How useful is this that straightly crash the powerpc?

And then generate warnings on arm64,

[  146.634626][    T1] debug_vm_pgtable: debug_vm_pgtable: Validating
architecture page table helpers
[  146.643995][    T1] ------------[ cut here ]------------
[  146.649350][    T1] virt_to_phys used for non-linear address:
(____ptrval____) (start_kernel+0x0/0x580)

Must be something wrong with the following in debug_vm_pgtable()

	paddr = __pa(&start_kernel);

Is there any explaination why start_kernel() is not in linear memory on ARM64 ?


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