Commit 11e68567 authored May 27, 2016 by Gavin Shan Committed by Linus Torvalds May 27, 2016

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>

parent 7cf7806c

mm/Kconfig

+1 −1

Original line number	Diff line number	Diff line
		@@ -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

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