Messages in this thread | | | Subject | Re: [PATCH v3 3/4] arch, mm: restore dependency of __kernel_map_pages() of DEBUG_PAGEALLOC | From | David Hildenbrand <> | Date | Mon, 2 Nov 2020 10:23:20 +0100 |
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> int __init kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn, unsigned long address, > unsigned numpages, unsigned long page_flags) > diff --git a/include/linux/mm.h b/include/linux/mm.h > index 14e397f3752c..ab0ef6bd351d 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -2924,7 +2924,11 @@ static inline bool debug_pagealloc_enabled_static(void) > return static_branch_unlikely(&_debug_pagealloc_enabled); > } > > -#if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_ARCH_HAS_SET_DIRECT_MAP) > +#ifdef CONFIG_DEBUG_PAGEALLOC > +/* > + * To support DEBUG_PAGEALLOC architecture must ensure that > + * __kernel_map_pages() never fails
Maybe add here, that this implies mapping everything via PTEs during boot.
Acked-by: David Hildenbrand <david@redhat.com>
-- Thanks,
David / dhildenb
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