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| author | Wei Yang <richard.weiyang@gmail.com> | 2024-06-16 03:35:37 +0200 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2024-06-24 11:12:39 +0200 |
| commit | 37db17c1008c84f972da1ddd7bb10248670e6aa3 (patch) | |
| tree | 301aaa7675226e9e2e1d7bd8613f533c42d0abdd /arch/s390/mm/init.c | |
| parent | s390: Provide optimized __arch_hweight*() implementations (diff) | |
| download | linux-37db17c1008c84f972da1ddd7bb10248670e6aa3.tar.xz linux-37db17c1008c84f972da1ddd7bb10248670e6aa3.zip | |
s390/mm: Get total ram pages from memblock
On s390, zero page's size relies on total ram pages.
Since we plan to move the accounting into __free_pages_core(),
totalram_pages may not represent the total usable pages on system
at this point when defer_init is enabled.
We can get the total usable pages from memblock directly. The size maybe
not accurate due to the alignment, but enough for the calculation.
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
CC: Mike Rapoport (IBM) <rppt@kernel.org>
CC: David Hildenbrand <david@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20240616013537.20338-1-richard.weiyang@gmail.com
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'arch/s390/mm/init.c')
| -rw-r--r-- | arch/s390/mm/init.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index e769d2726f4e..ddcd39ef4346 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -62,6 +62,7 @@ EXPORT_SYMBOL(zero_page_mask); static void __init setup_zero_pages(void) { + unsigned long total_pages = PHYS_PFN(memblock_phys_mem_size() - memblock_reserved_size()); unsigned int order; struct page *page; int i; @@ -70,7 +71,7 @@ static void __init setup_zero_pages(void) order = 7; /* Limit number of empty zero pages for small memory sizes */ - while (order > 2 && (totalram_pages() >> 10) < (1UL << order)) + while (order > 2 && (total_pages >> 10) < (1UL << order)) order--; empty_zero_page = __get_free_pages(GFP_KERNEL | __GFP_ZERO, order); |