The patch titled
Subject: mm/mm_init.c: print mem_init info after defer_init is done
has been added to the -mm mm-unstable branch. Its filename is
mm-mm_initc-print-mem_init-info-after-defer_init-is-done.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-print-mem_init-info-after-defer_init-is-done.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: mm/mm_init.c: print mem_init info after defer_init is done
Date: Tue, 11 Jun 2024 14:52:23 +0000
Current call flow looks like this:
start_kernel
mm_core_init
mem_init
mem_init_print_info
rest_init
kernel_init
kernel_init_freeable
page_alloc_init_late
deferred_init_memmap
If CONFIG_DEFERRED_STRUCT_PAGE_INIT, the time mem_init_print_info()
calls, pages are not totally initialized and freed to buddy.
This has one issue
* nr_free_pages() just contains partial free pages in the system,
which is not we expect.
Let's print the mem info after defer_init is done.
Also this would help changing totalram_pages accounting, since we plan
to move the accounting into __free_pages_core().
Link: https://lkml.kernel.org/r/20240611145223.16872-1-richard.weiyang@xxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Acked-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mm_init.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/mm/mm_init.c~mm-mm_initc-print-mem_init-info-after-defer_init-is-done
+++ a/mm/mm_init.c
@@ -2327,6 +2327,7 @@ void set_zone_contiguous(struct zone *zo
zone->contiguous = true;
}
+static void __init mem_init_print_info(void);
void __init page_alloc_init_late(void)
{
struct zone *zone;
@@ -2353,6 +2354,8 @@ void __init page_alloc_init_late(void)
files_maxfiles_init();
#endif
+ /* Accounting of total+free memory is stable at this point. */
+ mem_init_print_info();
buffer_init();
/* Discard memblock private memory */
@@ -2713,7 +2716,6 @@ void __init mm_core_init(void)
kmsan_init_shadow();
stack_depot_early_init();
mem_init();
- mem_init_print_info();
kmem_cache_init();
/*
* page_owner must be initialized after buddy is ready, and also after
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxx are
mm-mm_initc-print-mem_init-info-after-defer_init-is-done.patch
