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authorPavel Tatashin <pasha.tatashin@oracle.com>2018-01-31 16:16:02 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-01-31 17:18:36 -0800
commit2e3ca40f03bb13709df40eff2f7fc157803fa5a3 (patch)
treefb12c4706d0a134c16f39fe669ce2309b4179328 /mm/Kconfig
parenta85f878b443f8d2b91ba76f09da21ac0af22e07f (diff)
downloadlinux-2e3ca40f03bb13709df40eff2f7fc157803fa5a3.tar.bz2
mm: relax deferred struct page requirements
There is no need to have ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT, as all the page initialization code is in common code. Also, there is no need to depend on MEMORY_HOTPLUG, as initialization code does not really use hotplug memory functionality. So, we can remove this requirement as well. This patch allows to use deferred struct page initialization on all platforms with memblock allocator. Tested on x86, arm64, and sparc. Also, verified that code compiles on PPC with CONFIG_MEMORY_HOTPLUG disabled. Link: http://lkml.kernel.org/r/20171117014601.31606-1-pasha.tatashin@oracle.com Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> [s390] Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Steven Sistare <steven.sistare@oracle.com> Cc: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Reza Arbab <arbab@linux.vnet.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Mel Gorman <mgorman@techsingularity.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/Kconfig')
-rw-r--r--mm/Kconfig7
1 files changed, 1 insertions, 6 deletions
diff --git a/mm/Kconfig b/mm/Kconfig
index 03ff7703d322..c782e8fb7235 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -639,15 +639,10 @@ config MAX_STACK_SIZE_MB
A sane initial value is 80 MB.
-# For architectures that support deferred memory initialisation
-config ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
- bool
-
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 NO_BOOTMEM && MEMORY_HOTPLUG
+ depends on NO_BOOTMEM
depends on !FLATMEM
help
Ordinarily all struct pages are initialised during early boot in a