Messages in this thread | | | From | Dexuan Cui <> | Subject | Does slow_virt_to_phys() work with vmalloc() in the case of 32bit-PAE and 2MB page? | Date | Tue, 28 Oct 2014 07:08:04 +0000 |
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Hi all, I suspect slow_virt_to_phys() may not work with vmalloc() in the 32-bit PAE case(when the pa > 4GB), probably due to 2MB page(?)
Is there any known issue with slow_virt_to_phys() + vmalloc() + 32-bit PAE + 2MB page?
From what I read the code of slow_virt_to_phys(), the variable 'psize' is assigned with a value but not used at all -- is this a bug?
phys_addr_t slow_virt_to_phys(void *__virt_addr) { unsigned long virt_addr = (unsigned long)__virt_addr; phys_addr_t phys_addr; unsigned long offset; enum pg_level level; unsigned long psize; unsigned long pmask; pte_t *pte;
pte = lookup_address(virt_addr, &level); BUG_ON(!pte); psize = page_level_size(level); pmask = page_level_mask(level); offset = virt_addr & ~pmask; phys_addr = pte_pfn(*pte) << PAGE_SHIFT; return (phys_addr | offset); }
Thanks, -- Dexuan
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