* [PATCH v2] powerpc: Make sparsemem the default on 64-bit Book3S
@ 2017-04-05 6:10 Michael Ellerman
2017-04-10 22:49 ` [v2] " Michael Ellerman
0 siblings, 1 reply; 2+ messages in thread
From: Michael Ellerman @ 2017-04-05 6:10 UTC (permalink / raw)
To: linuxppc-dev
Make sparsemem the default on all 64-bit Book3S platforms. It already is
for pseries and ps3, and we need to enable it for powernv because on
POWER9 memory between chips is discontiguous.
For the other platforms sparsemem should work fine, though it might add
a small amount of overhead. We can always force FLATMEM in the
defconfigs if necessary.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
v2: Rather than enabling it for powernv, just turn it on for all 64-bit Book3S.
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 97a8bc8a095c..0ab49b1256a8 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -586,7 +586,7 @@ config ARCH_SPARSEMEM_ENABLE
config ARCH_SPARSEMEM_DEFAULT
def_bool y
- depends on (SMP && PPC_PSERIES) || PPC_PS3
+ depends on PPC_BOOK3S_64
config SYS_SUPPORTS_HUGETLBFS
bool
--
2.7.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [v2] powerpc: Make sparsemem the default on 64-bit Book3S
2017-04-05 6:10 [PATCH v2] powerpc: Make sparsemem the default on 64-bit Book3S Michael Ellerman
@ 2017-04-10 22:49 ` Michael Ellerman
0 siblings, 0 replies; 2+ messages in thread
From: Michael Ellerman @ 2017-04-10 22:49 UTC (permalink / raw)
To: Michael Ellerman, linuxppc-dev
On Wed, 2017-04-05 at 06:10:48 UTC, Michael Ellerman wrote:
> Make sparsemem the default on all 64-bit Book3S platforms. It already is
> for pseries and ps3, and we need to enable it for powernv because on
> POWER9 memory between chips is discontiguous.
>
> For the other platforms sparsemem should work fine, though it might add
> a small amount of overhead. We can always force FLATMEM in the
> defconfigs if necessary.
>
> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Applied to powerpc next.
https://git.kernel.org/powerpc/c/7b3912f4223541c5108565d4bad289
cheers
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