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Date: Thu, 19 May 2016 14:29:05 -0700 From: Yang Shi <yang.shi@...aro.org> To: akpm@...ux-foundation.org, iamjoonsoo.kim@....com Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org, linaro-kernel@...ts.linaro.org, yang.shi@...aro.org Subject: [PATCH] mm: move page_ext_init after all struct pages are initialized 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@....com> Signed-off-by: Yang Shi <yang.shi@...aro.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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