From fe53ca54270a757f0a28ee6bf3a54d952b550ed0 Mon Sep 17 00:00:00 2001 From: Yang Shi Date: Fri, 27 May 2016 14:27:30 -0700 Subject: mm: use early_pfn_to_nid in page_ext_init page_ext_init() checks suitable pages with pfn_to_nid(), but pfn_to_nid() depends on memmap which will not be setup fully until page_alloc_init_late() is done. Use early_pfn_to_nid() instead of pfn_to_nid() so that page extension could be still used early even though CONFIG_ DEFERRED_STRUCT_PAGE_INIT is enabled and catch early page allocation call sites. Suggested by Joonsoo Kim [1], this fix basically undoes the change introduced by commit b8f1a75d61d840 ("mm: call page_ext_init() after all struct pages are initialized") and fixes the same problem with a better approach. [1] http://lkml.kernel.org/r/CAAmzW4OUmyPwQjvd7QUfc6W1Aic__TyAuH80MLRZNMxKy0-wPQ@mail.gmail.com Link: http://lkml.kernel.org/r/1464198689-23458-1-git-send-email-yang.shi@linaro.org Signed-off-by: Yang Shi Cc: Joonsoo Kim Cc: Mel Gorman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- init/main.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'init') diff --git a/init/main.c b/init/main.c index bc0f9e0bcf22..4c17fda5c2ff 100644 --- a/init/main.c +++ b/init/main.c @@ -607,6 +607,7 @@ asmlinkage __visible void __init start_kernel(void) initrd_start = 0; } #endif + page_ext_init(); debug_objects_mem_init(); kmemleak_init(); setup_per_cpu_pageset(); @@ -1003,8 +1004,6 @@ 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(); -- cgit v1.2.3