| Message ID | 20190306190005.7036-3-alex@ghiti.fr (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Fix free/allocation of runtime gigantic pages | expand |
From: Alexandre Ghiti <alex@ghiti.fr> Date: Wed, 6 Mar 2019 14:00:03 -0500 > 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> Much better. Acked-by: David S. Miller <davem@davemloft.net>
On 3/6/19 2:04 PM, David Miller wrote: > From: Alexandre Ghiti <alex@ghiti.fr> > Date: Wed, 6 Mar 2019 14:00:03 -0500 > >> 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> > Much better. > > Acked-by: David S. Miller <davem@davemloft.net> Thanks ! Alex
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
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> --- arch/sparc/Kconfig | 1 + 1 file changed, 1 insertion(+)