The patch titled
Subject: mm/mm_init.c: add new function calc_nr_all_pages()
has been added to the -mm mm-unstable branch. Its filename is
mm-mm_initc-add-new-function-calc_nr_all_pages.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-mm_initc-add-new-function-calc_nr_all_pages.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Baoquan He <bhe@xxxxxxxxxx>
Subject: mm/mm_init.c: add new function calc_nr_all_pages()
Date: Mon, 25 Mar 2024 22:56:43 +0800
This is a preparation to calculate nr_kernel_pages and nr_all_pages, both
of which will be used later in alloc_large_system_hash().
nr_all_pages counts up all free but not reserved memory in memblock
allocator, including HIGHMEM memory. While nr_kernel_pages counts up all
free but not reserved low memory in memblock allocator, excluding HIGHMEM
memory.
Link: https://lkml.kernel.org/r/20240325145646.1044760-4-bhe@xxxxxxxxxx
Signed-off-by: Baoquan He <bhe@xxxxxxxxxx>
Cc: "Mike Rapoport (IBM)" <rppt@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mm_init.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
--- a/mm/mm_init.c~mm-mm_initc-add-new-function-calc_nr_all_pages
+++ a/mm/mm_init.c
@@ -1265,6 +1265,30 @@ static void __init reset_memoryless_node
pr_debug("On node %d totalpages: 0\n", pgdat->node_id);
}
+static void __init calc_nr_kernel_pages(void)
+{
+ unsigned long start_pfn, end_pfn;
+ phys_addr_t start_addr, end_addr;
+ u64 u;
+#ifdef CONFIG_HIGHMEM
+ unsigned long high_zone_low = arch_zone_lowest_possible_pfn[ZONE_HIGHMEM];
+#endif
+
+ for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start_addr, &end_addr, NULL) {
+ start_pfn = PFN_UP(start_addr);
+ end_pfn = PFN_DOWN(end_addr);
+
+ if (start_pfn < end_pfn) {
+ nr_all_pages += end_pfn - start_pfn;
+#ifdef CONFIG_HIGHMEM
+ start_pfn = clamp(start_pfn, 0, high_zone_low);
+ end_pfn = clamp(end_pfn, 0, high_zone_low);
+#endif
+ nr_kernel_pages += end_pfn - start_pfn;
+ }
+ }
+}
+
static void __init calculate_node_totalpages(struct pglist_data *pgdat,
unsigned long node_start_pfn,
unsigned long node_end_pfn)
_
Patches currently in -mm which might be from bhe@xxxxxxxxxx are
mm-vmallocc-optimize-to-reduce-arguments-of-alloc_vmap_area.patch
x86-remove-unneeded-memblock_find_dma_reserve.patch
mm-mm_initc-remove-the-useless-dma_reserve.patch
mm-mm_initc-add-new-function-calc_nr_all_pages.patch
mm-mm_initc-remove-meaningless-calculation-of-zone-managed_pages-in-free_area_init_core.patch
mm-mm_initc-remove-unneeded-calc_memmap_size.patch
mm-mm_initc-remove-arch_reserved_kernel_pages.patch
