* [PATCH 2/3] powerpc: Make NUMA default y for powernv
2020-11-24 12:05 [PATCH 1/3] powerpc: Make NUMA depend on SMP Michael Ellerman
@ 2020-11-24 12:05 ` Michael Ellerman
2020-11-25 4:30 ` Srikar Dronamraju
2020-11-24 12:05 ` [PATCH 3/3] powerpc: Update NUMA Kconfig description & help text Michael Ellerman
` (3 subsequent siblings)
4 siblings, 1 reply; 8+ messages in thread
From: Michael Ellerman @ 2020-11-24 12:05 UTC (permalink / raw)
To: linuxppc-dev; +Cc: rdunlap, srikar
Our NUMA option is default y for pseries, but not powernv. The bulk of
powernv systems are NUMA, so make NUMA default y for powernv also.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index a22db3db6b96..4d688b426353 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -661,7 +661,7 @@ config IRQ_ALL_CPUS
config NUMA
bool "NUMA support"
depends on PPC64 && SMP
- default y if SMP && PPC_PSERIES
+ default y if PPC_PSERIES || PPC_POWERNV
config NODES_SHIFT
int
--
2.25.1
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH 2/3] powerpc: Make NUMA default y for powernv
2020-11-24 12:05 ` [PATCH 2/3] powerpc: Make NUMA default y for powernv Michael Ellerman
@ 2020-11-25 4:30 ` Srikar Dronamraju
0 siblings, 0 replies; 8+ messages in thread
From: Srikar Dronamraju @ 2020-11-25 4:30 UTC (permalink / raw)
To: Michael Ellerman; +Cc: linuxppc-dev, rdunlap
* Michael Ellerman <mpe@ellerman.id.au> [2020-11-24 23:05:46]:
> Our NUMA option is default y for pseries, but not powernv. The bulk of
> powernv systems are NUMA, so make NUMA default y for powernv also.
>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Looks good to me.
Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
> ---
> arch/powerpc/Kconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index a22db3db6b96..4d688b426353 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -661,7 +661,7 @@ config IRQ_ALL_CPUS
> config NUMA
> bool "NUMA support"
> depends on PPC64 && SMP
> - default y if SMP && PPC_PSERIES
> + default y if PPC_PSERIES || PPC_POWERNV
>
> config NODES_SHIFT
> int
> --
> 2.25.1
>
--
Thanks and Regards
Srikar Dronamraju
^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH 3/3] powerpc: Update NUMA Kconfig description & help text
2020-11-24 12:05 [PATCH 1/3] powerpc: Make NUMA depend on SMP Michael Ellerman
2020-11-24 12:05 ` [PATCH 2/3] powerpc: Make NUMA default y for powernv Michael Ellerman
@ 2020-11-24 12:05 ` Michael Ellerman
2020-11-24 19:47 ` Randy Dunlap
2020-11-24 19:46 ` [PATCH 1/3] powerpc: Make NUMA depend on SMP Randy Dunlap
` (2 subsequent siblings)
4 siblings, 1 reply; 8+ messages in thread
From: Michael Ellerman @ 2020-11-24 12:05 UTC (permalink / raw)
To: linuxppc-dev; +Cc: rdunlap, srikar
Update the NUMA Kconfig description to match other architectures, and
add some help text. Shamelessly borrowed from x86/arm64.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/Kconfig | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 4d688b426353..7f4995b245a3 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -659,9 +659,15 @@ config IRQ_ALL_CPUS
reported with SMP Power Macintoshes with this option enabled.
config NUMA
- bool "NUMA support"
+ bool "NUMA Memory Allocation and Scheduler Support"
depends on PPC64 && SMP
default y if PPC_PSERIES || PPC_POWERNV
+ help
+ Enable NUMA (Non-Uniform Memory Access) support.
+
+ The kernel will try to allocate memory used by a CPU on the
+ local memory controller of the CPU and add some more
+ NUMA awareness to the kernel.
config NODES_SHIFT
int
--
2.25.1
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH 3/3] powerpc: Update NUMA Kconfig description & help text
2020-11-24 12:05 ` [PATCH 3/3] powerpc: Update NUMA Kconfig description & help text Michael Ellerman
@ 2020-11-24 19:47 ` Randy Dunlap
0 siblings, 0 replies; 8+ messages in thread
From: Randy Dunlap @ 2020-11-24 19:47 UTC (permalink / raw)
To: Michael Ellerman, linuxppc-dev; +Cc: srikar
On 11/24/20 4:05 AM, Michael Ellerman wrote:
> Update the NUMA Kconfig description to match other architectures, and
> add some help text. Shamelessly borrowed from x86/arm64.
>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Thanks.
> ---
> arch/powerpc/Kconfig | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 4d688b426353..7f4995b245a3 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -659,9 +659,15 @@ config IRQ_ALL_CPUS
> reported with SMP Power Macintoshes with this option enabled.
>
> config NUMA
> - bool "NUMA support"
> + bool "NUMA Memory Allocation and Scheduler Support"
> depends on PPC64 && SMP
> default y if PPC_PSERIES || PPC_POWERNV
> + help
> + Enable NUMA (Non-Uniform Memory Access) support.
> +
> + The kernel will try to allocate memory used by a CPU on the
> + local memory controller of the CPU and add some more
> + NUMA awareness to the kernel.
>
> config NODES_SHIFT
> int
>
--
~Randy
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 1/3] powerpc: Make NUMA depend on SMP
2020-11-24 12:05 [PATCH 1/3] powerpc: Make NUMA depend on SMP Michael Ellerman
2020-11-24 12:05 ` [PATCH 2/3] powerpc: Make NUMA default y for powernv Michael Ellerman
2020-11-24 12:05 ` [PATCH 3/3] powerpc: Update NUMA Kconfig description & help text Michael Ellerman
@ 2020-11-24 19:46 ` Randy Dunlap
2020-11-25 4:30 ` Srikar Dronamraju
2020-12-10 11:30 ` Michael Ellerman
4 siblings, 0 replies; 8+ messages in thread
From: Randy Dunlap @ 2020-11-24 19:46 UTC (permalink / raw)
To: Michael Ellerman, linuxppc-dev; +Cc: srikar
On 11/24/20 4:05 AM, Michael Ellerman wrote:
> Our Kconfig allows NUMA to be enabled without SMP, but none of
> our defconfigs use that combination. This means it can easily be
> broken inadvertently by code changes, which has happened recently.
>
> Although it's theoretically possible to have a machine with a single
> CPU and multiple memory nodes, I can't think of any real systems where
> that's the case. Even so if such a system exists, it can just run an
> SMP kernel anyway.
>
> So to avoid the need to add extra #ifdefs and/or build breaks, make
> NUMA depend on SMP.
>
> Reported-by: kernel test robot <lkp@intel.com>
> Reported-by: Randy Dunlap <rdunlap@infradead.org>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Thanks.
> ---
> arch/powerpc/Kconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index e9f13fe08492..a22db3db6b96 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -660,7 +660,7 @@ config IRQ_ALL_CPUS
>
> config NUMA
> bool "NUMA support"
> - depends on PPC64
> + depends on PPC64 && SMP
> default y if SMP && PPC_PSERIES
>
> config NODES_SHIFT
>
--
~Randy
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 1/3] powerpc: Make NUMA depend on SMP
2020-11-24 12:05 [PATCH 1/3] powerpc: Make NUMA depend on SMP Michael Ellerman
` (2 preceding siblings ...)
2020-11-24 19:46 ` [PATCH 1/3] powerpc: Make NUMA depend on SMP Randy Dunlap
@ 2020-11-25 4:30 ` Srikar Dronamraju
2020-12-10 11:30 ` Michael Ellerman
4 siblings, 0 replies; 8+ messages in thread
From: Srikar Dronamraju @ 2020-11-25 4:30 UTC (permalink / raw)
To: Michael Ellerman; +Cc: linuxppc-dev, rdunlap
* Michael Ellerman <mpe@ellerman.id.au> [2020-11-24 23:05:45]:
> Our Kconfig allows NUMA to be enabled without SMP, but none of
> our defconfigs use that combination. This means it can easily be
> broken inadvertently by code changes, which has happened recently.
>
> Although it's theoretically possible to have a machine with a single
> CPU and multiple memory nodes, I can't think of any real systems where
> that's the case. Even so if such a system exists, it can just run an
> SMP kernel anyway.
>
> So to avoid the need to add extra #ifdefs and/or build breaks, make
> NUMA depend on SMP.
>
> Reported-by: kernel test robot <lkp@intel.com>
> Reported-by: Randy Dunlap <rdunlap@infradead.org>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Looks good to me.
Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
> ---
> arch/powerpc/Kconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index e9f13fe08492..a22db3db6b96 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -660,7 +660,7 @@ config IRQ_ALL_CPUS
>
> config NUMA
> bool "NUMA support"
> - depends on PPC64
> + depends on PPC64 && SMP
> default y if SMP && PPC_PSERIES
>
> config NODES_SHIFT
> --
> 2.25.1
>
--
Thanks and Regards
Srikar Dronamraju
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 1/3] powerpc: Make NUMA depend on SMP
2020-11-24 12:05 [PATCH 1/3] powerpc: Make NUMA depend on SMP Michael Ellerman
` (3 preceding siblings ...)
2020-11-25 4:30 ` Srikar Dronamraju
@ 2020-12-10 11:30 ` Michael Ellerman
4 siblings, 0 replies; 8+ messages in thread
From: Michael Ellerman @ 2020-12-10 11:30 UTC (permalink / raw)
To: linuxppc-dev, Michael Ellerman; +Cc: rdunlap, srikar
On Tue, 24 Nov 2020 23:05:45 +1100, Michael Ellerman wrote:
> Our Kconfig allows NUMA to be enabled without SMP, but none of
> our defconfigs use that combination. This means it can easily be
> broken inadvertently by code changes, which has happened recently.
>
> Although it's theoretically possible to have a machine with a single
> CPU and multiple memory nodes, I can't think of any real systems where
> that's the case. Even so if such a system exists, it can just run an
> SMP kernel anyway.
>
> [...]
Applied to powerpc/next.
[1/3] powerpc: Make NUMA depend on SMP
https://git.kernel.org/powerpc/c/25395cd2f8cb24ce6a5ce073c898acfb091e06cf
[2/3] powerpc: Make NUMA default y for powernv
https://git.kernel.org/powerpc/c/4c28b32b886f1489c5f510ed8e3f0c4e3dcb59f5
[3/3] powerpc: Update NUMA Kconfig description & help text
https://git.kernel.org/powerpc/c/bae80c27fc2195b9e5723d7b05c592e0874f4ba9
cheers
^ permalink raw reply [flat|nested] 8+ messages in thread