The patch titled
Subject: init,mm: fold late call to page_ext_init() to page_alloc_init_late()
has been added to the -mm mm-unstable branch. Its filename is
initmm-fold-late-call-to-page_ext_init-to-page_alloc_init_late.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/initmm-fold-late-call-to-page_ext_init-to-page_alloc_init_late.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: "Mike Rapoport (IBM)" <rppt@xxxxxxxxxx>
Subject: init,mm: fold late call to page_ext_init() to page_alloc_init_late()
Date: Mon, 20 Mar 2023 00:00:04 +0200
When deferred initialization of struct pages is enabled, page_ext_init()
must be called after all the deferred initialization is done, but there is
no point to keep it a separate call from kernel_init_freeable() right
after page_alloc_init_late().
Fold the call to page_ext_init() into page_alloc_init_late() and localize
deferred_struct_pages variable.
Link: https://lkml.kernel.org/r/20230319220008.2138576-12-rppt@xxxxxxxxxx
Signed-off-by: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/include/linux/page_ext.h~initmm-fold-late-call-to-page_ext_init-to-page_alloc_init_late
+++ a/include/linux/page_ext.h
@@ -29,8 +29,6 @@ struct page_ext_operations {
bool need_shared_flags;
};
-extern bool deferred_struct_pages;
-
#ifdef CONFIG_PAGE_EXTENSION
/*
--- a/init/main.c~initmm-fold-late-call-to-page_ext_init-to-page_alloc_init_late
+++ a/init/main.c
@@ -62,7 +62,6 @@
#include <linux/rmap.h>
#include <linux/mempolicy.h>
#include <linux/key.h>
-#include <linux/page_ext.h>
#include <linux/debug_locks.h>
#include <linux/debugobjects.h>
#include <linux/lockdep.h>
@@ -1561,9 +1560,6 @@ static noinline void __init kernel_init_
padata_init();
page_alloc_init_late();
- /* Initialize page ext after all struct pages are initialized. */
- if (deferred_struct_pages)
- page_ext_init();
do_basic_setup();
--- a/mm/mm_init.c~initmm-fold-late-call-to-page_ext_init-to-page_alloc_init_late
+++ a/mm/mm_init.c
@@ -225,7 +225,7 @@ static unsigned long nr_kernel_pages __i
static unsigned long nr_all_pages __initdata;
static unsigned long dma_reserve __initdata;
-bool deferred_struct_pages __meminitdata;
+static bool deferred_struct_pages __meminitdata;
static DEFINE_PER_CPU(struct per_cpu_nodestat, boot_nodestats);
@@ -2338,6 +2338,10 @@ void __init page_alloc_init_late(void)
for_each_populated_zone(zone)
set_zone_contiguous(zone);
+
+ /* Initialize page ext after all struct pages are initialized. */
+ if (deferred_struct_pages)
+ page_ext_init();
}
#ifndef __HAVE_ARCH_RESERVED_KERNEL_PAGES
_
Patches currently in -mm which might be from rppt@xxxxxxxxxx are
mm-move-get_page_from_free_area-to-mm-page_allocc.patch
mips-fix-comment-about-pgtable_init.patch
mm-cma-move-init_cma_reserved_pages-to-cmac-and-make-it-static.patch
mm-page_alloc-add-helper-for-checking-if-check_pages_enabled.patch
mm-move-most-of-core-mm-initialization-to-mm-mm_initc.patch
mm-handle-hashdist-initialization-in-mm-mm_initc.patch
mm-page_alloc-rename-page_alloc_init-to-page_alloc_init_cpuhp.patch
init-fold-build_all_zonelists-and-page_alloc_init_cpuhp-to-mm_init.patch
initmm-move-mm_init-to-mm-mm_initc-and-rename-it-to-mm_core_init.patch
mm-move-pgtable_init-to-mm-mm_initc-and-make-it-static.patch
mm-move-init_mem_debugging_and_hardening-to-mm-mm_initc.patch
initmm-fold-late-call-to-page_ext_init-to-page_alloc_init_late.patch
mm-move-mem_init_print_info-to-mm_initc.patch
mm-move-kmem_cache_init-declaration-to-mm-slabh.patch
mm-move-vmalloc_init-declaration-to-mm-internalh.patch
maintainers-extend-memblock-entry-to-include-mm-initialization.patch
