OrgACRN
/
acrn-kernel
mirror of https://github.com/projectacrn/acrn-kernel.git
1
0
Fork 0
Code Issues Releases Wiki Activity

LoongArch: numa: Fix high_memory calculation 

commit 1943feecf8 upstream.

For 64bit kernel without HIGHMEM, high_memory is the virtual address of
the highest physical address in the system. But __va(get_num_physpages()
<< PAGE_SHIFT) is not what we want for high_memory because there may be
holes in the physical address space. On the other hand, max_low_pfn is
calculated from memblock_end_of_DRAM(), which is exactly corresponding
to the highest physical address, so use it for high_memory calculation.

Cc: <stable@vger.kernel.org>
Fixes: d4b6f1562a ("LoongArch: Add Non-Uniform Memory Access (NUMA) support")
Signed-off-by: Chong Qiao <qiaochong@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Huacai Chen 2023-09-27 16:19:13 +08:00 committed by Greg Kroah-Hartman
parent 7bc8585aa0
commit 490f3b805e
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/loongarch/kernel/numa.c
View File

@ -453,7 +453,7 @@ void __init paging_init(void)
void __init mem_init(void)
{
high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
memblock_free_all();
setup_zero_pages(); /* This comes from node 0 */
}