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Subject[PATCH] mm: move page_ext_init after all struct pages are initialized
Date
When DEFERRED_STRUCT_PAGE_INIT is enabled, just a subset of memmap at boot
are initialized, then the rest are initialized in parallel by starting one-off
"pgdatinitX" kernel thread for each node X.

If page_ext_init is called before it, some pages will not have valid extension,
so move page_ext_init() after it.

CC: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Yang Shi <yang.shi@linaro.org>
---
init/main.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/init/main.c b/init/main.c
index b3c6e36..2075faf 100644
--- a/init/main.c
+++ b/init/main.c
@@ -606,7 +606,6 @@ asmlinkage __visible void __init start_kernel(void)
initrd_start = 0;
}
#endif
- page_ext_init();
debug_objects_mem_init();
kmemleak_init();
setup_per_cpu_pageset();
@@ -1004,6 +1003,8 @@ static noinline void __init kernel_init_freeable(void)
sched_init_smp();

page_alloc_init_late();
+ /* Initialize page ext after all struct pages are initializaed */
+ page_ext_init();

do_basic_setup();

--
2.0.2
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