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mm: disable DEFERRED_STRUCT_PAGE_INIT on !NO_BOOTMEM 

When we have !NO_BOOTMEM, the deferred page struct initialization
doesn't work well because the pages reserved in bootmem are released to
the page allocator uncoditionally.  It causes memory corruption and
system crash eventually.

As Mel suggested, the bootmem is retiring slowly.  We fix the issue by
simply hiding DEFERRED_STRUCT_PAGE_INIT when bootmem is enabled.

Link: http://lkml.kernel.org/r/1460602170-5821-1-git-send-email-gwshan@linux.vnet.ibm.com
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Gavin Shan 2016-05-27 14:27:49 -07:00 committed by Linus Torvalds
parent 7cf7806ce1
commit 11e685672a
1 changed files with 1 additions and 1 deletions
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mm/Kconfig
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@ -648,7 +648,7 @@ config DEFERRED_STRUCT_PAGE_INIT
bool "Defer initialisation of struct pages to kthreads"
default n
depends on ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
depends on MEMORY_HOTPLUG
depends on NO_BOOTMEM && MEMORY_HOTPLUG
depends on !FLATMEM
help
Ordinarily all struct pages are initialised during early boot in a