mm: use early_pfn_to_nid in page_ext_init
commitfe53ca54270a757f0a28ee6bf3a54d952b550ed0
authorYang Shi <yang.shi@linaro.org>
Fri, 27 May 2016 21:27:30 +0000 (27 14:27 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 27 May 2016 21:49:37 +0000 (27 14:49 -0700)
treef124113d718b8fc04880cfabe47efcec734b1f4d
parentf871f191357ebadb6ad7e8ecf6e8f40b694eea00
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 <yang.shi@linaro.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
init/main.c
mm/page_ext.c