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[v6,2/4] sparc: Advertise gigantic page support

Message ID 20190307132015.26970-3-alex@ghiti.fr (mailing list archive)
State Superseded
Headers show
Series Fix free/allocation of runtime gigantic pages | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch success Successfully applied on branch next (9580b71b5a7863c24a9bd18bcd2ad759b86b1eff)
snowpatch_ozlabs/checkpatch success total: 0 errors, 0 warnings, 0 checks, 7 lines checked

Commit Message

Alexandre Ghiti March 7, 2019, 1:20 p.m. UTC 
sparc actually supports gigantic pages and selecting
ARCH_HAS_GIGANTIC_PAGE allows it to allocate and free
gigantic pages at runtime.

sparc allows configuration such as huge pages of 16GB,
pages of 8KB and MAX_ORDER = 13 (default):
HPAGE_SHIFT (34) - PAGE_SHIFT (13) = 21 >= MAX_ORDER (13)

Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Acked-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/Kconfig | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index d5dd652fb8cc..0b7f0e0fefa5 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -90,6 +90,7 @@  config SPARC64
 	select ARCH_CLOCKSOURCE_DATA
 	select ARCH_HAS_PTE_SPECIAL
 	select PCI_DOMAINS if PCI
+	select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
 
 config ARCH_DEFCONFIG
 	string