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authorPasha Tatashin <pasha.tatashin@soleen.com>2023-01-17 23:46:17 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-02-03 09:33:22 +0300
commit7ec7096b8577d3b899c1dae456a414f2d08c7ddb (patch)
tree61fcd4e096bddc8dac5b223b8c5b14f4df7b0184 /init
parent64517d6e1291b5e942b00c53674ecf33f918313f (diff)
downloadlinux-7ec7096b8577d3b899c1dae456a414f2d08c7ddb.tar.xz
mm/page_ext: init page_ext early if there are no deferred struct pages
page_ext must be initialized after all struct pages are initialized. Therefore, page_ext is initialized after page_alloc_init_late(), and can optionally be initialized earlier via early_page_ext kernel parameter which as a side effect also disables deferred struct pages. Allow to automatically init page_ext early when there are no deferred struct pages in order to be able to use page_ext during kernel boot and track for example page allocations early. [pasha.tatashin@soleen.com: fix build with CONFIG_PAGE_EXTENSION=n] Link: https://lkml.kernel.org/r/20230118155251.2522985-1-pasha.tatashin@soleen.com Link: https://lkml.kernel.org/r/20230117204617.1553748-1-pasha.tatashin@soleen.com Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com> Acked-by: Mike Rapoport (IBM) <rppt@kernel.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Charan Teja Kalla <quic_charante@quicinc.com> Cc: David Hildenbrand <david@redhat.com> Cc: Li Zhe <lizhe.67@bytedance.com> Cc: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'init')
-rw-r--r--init/main.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/init/main.c b/init/main.c
index e1c3911d7c70..64cd2ff051c4 100644
--- a/init/main.c
+++ b/init/main.c
@@ -855,8 +855,8 @@ static void __init mm_init(void)
pgtable_init();
debug_objects_mem_init();
vmalloc_init();
- /* Should be run after vmap initialization */
- if (early_page_ext_enabled())
+ /* If no deferred init page_ext now, as vmap is fully initialized */
+ if (!deferred_struct_pages)
page_ext_init();
/* Should be run before the first non-init thread is created */
init_espfix_bsp();
@@ -1628,7 +1628,7 @@ static noinline void __init kernel_init_freeable(void)
padata_init();
page_alloc_init_late();
/* Initialize page ext after all struct pages are initialized. */
- if (!early_page_ext_enabled())
+ if (deferred_struct_pages)
page_ext_init();
do_basic_setup();