Re: [PATCH 7/9] mm: Calc the right pfn if page size is not 4K

mawupeng <mawupeng1@xxxxxxxxxx> · Tue, 29 Mar 2022 09:14:50 +0800

在 2022/3/28 20:33, David Hildenbrand 写道:

On 26.03.22 07:46, Wupeng Ma wrote:

From: Ma Wupeng <mawupeng1@xxxxxxxxxx>

Pervious 0x100000 is used to check the 4G limit in


s/Pervious/Previous/


find_zone_movable_pfns_for_nodes(). This is right in x86 because
the page size can only be 4K. But 16K and 64K are available in
arm64. So replate it with SIZE_4G >> PAGE_SHIFT.


s/replate/replace/



Signed-off-by: Ma Wupeng <mawupeng1@xxxxxxxxxx>
---
  mm/page_alloc.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6e0b4596cde9..41fd987b5b93 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -7811,7 +7811,7 @@ static void __init find_zone_movable_pfns_for_nodes(void)

  

  			usable_startpfn = memblock_region_memory_base_pfn(r);

  

-			if (usable_startpfn < 0x100000) {

+			if (usable_startpfn < (SZ_4G >> PAGE_SHIFT)) {


PHYS_PFN(SZ_4G)

?


Thanks for reviewing, will be fixed in the next version.

Thanks.

  				mem_below_4gb_not_mirrored = true;
  				continue;
  			}






