Messages in this thread | | | Date | Wed, 28 Nov 2012 12:38:06 -0800 | Subject | Re: [PATCH v8 34/46] x86, mm: Add check before clear pte above max_low_pfn on 32bit | From | Yinghai Lu <> |
| |
On Wed, Nov 28, 2012 at 11:09 AM, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> wrote: >> /* >> * Remove any mappings which extend past the end of physical >> - * memory from the boot time page table: >> + * memory from the boot time page table. >> + * In virtual address space, we should have at least two pages >> + * from VMALLOC_END to pkmap or fixmap according to VMALLOC_END >> + * definition. And max_low_pfn is set to VMALLOC_END physical >> + * address. If initial memory mapping is doing right job, we >> + * should have pte used near max_low_pfn or one pmd is not present. > > 'have pte used near' ? > > Do you mean we should have an used PTE near max_low_pfn and one > empty PMD? >
==> * we should have used PTE to map address near max_low_pfn or * one empty PMD
| |