* [PATCH] arm64: Kconfig: allow to change FORCE_MAX_ZONEORDER via custom config
@ 2020-03-12 23:50 Vadym Kochan
2020-03-13 12:37 ` Catalin Marinas
0 siblings, 1 reply; 4+ messages in thread
From: Vadym Kochan @ 2020-03-12 23:50 UTC (permalink / raw)
To: Catalin Marinas, Will Deacon, linux-arm-kernel, linux-kernel; +Cc: Vadym Kochan
Add missing config option name which allows to change it via custom
config.
Signed-off-by: Vadym Kochan <vadym.kochan@plvision.eu>
---
arch/arm64/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 0b30e884e088..d974f31c3c18 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1120,7 +1120,7 @@ config XEN
Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
config FORCE_MAX_ZONEORDER
- int
+ int "Maximum zone order"
default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
default "12" if (ARM64_16K_PAGES && TRANSPARENT_HUGEPAGE)
default "11"
--
2.17.1
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] arm64: Kconfig: allow to change FORCE_MAX_ZONEORDER via custom config
2020-03-12 23:50 [PATCH] arm64: Kconfig: allow to change FORCE_MAX_ZONEORDER via custom config Vadym Kochan
@ 2020-03-13 12:37 ` Catalin Marinas
2020-03-13 12:45 ` Vadym Kochan
0 siblings, 1 reply; 4+ messages in thread
From: Catalin Marinas @ 2020-03-13 12:37 UTC (permalink / raw)
To: Vadym Kochan; +Cc: Will Deacon, linux-kernel, linux-arm-kernel
On Fri, Mar 13, 2020 at 01:50:37AM +0200, Vadym Kochan wrote:
> Add missing config option name which allows to change it via custom
> config.
Why? What is your use-case?
--
Catalin
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] arm64: Kconfig: allow to change FORCE_MAX_ZONEORDER via custom config
2020-03-13 12:37 ` Catalin Marinas
@ 2020-03-13 12:45 ` Vadym Kochan
2020-03-16 17:42 ` Catalin Marinas
0 siblings, 1 reply; 4+ messages in thread
From: Vadym Kochan @ 2020-03-13 12:45 UTC (permalink / raw)
To: Catalin Marinas; +Cc: Will Deacon, linux-kernel, linux-arm-kernel
On Fri, Mar 13, 2020 at 12:37:41PM +0000, Catalin Marinas wrote:
> On Fri, Mar 13, 2020 at 01:50:37AM +0200, Vadym Kochan wrote:
> > Add missing config option name which allows to change it via custom
> > config.
>
> Why? What is your use-case?
>
> --
> Catalin
I need to allocate buffers bigger than default ZONEORDER, so I tried to
increase it but it did not work because the config entry has no name.
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] arm64: Kconfig: allow to change FORCE_MAX_ZONEORDER via custom config
2020-03-13 12:45 ` Vadym Kochan
@ 2020-03-16 17:42 ` Catalin Marinas
0 siblings, 0 replies; 4+ messages in thread
From: Catalin Marinas @ 2020-03-16 17:42 UTC (permalink / raw)
To: Vadym Kochan; +Cc: Will Deacon, linux-kernel, linux-arm-kernel
On Fri, Mar 13, 2020 at 02:45:58PM +0200, Vadym Kochan wrote:
> On Fri, Mar 13, 2020 at 12:37:41PM +0000, Catalin Marinas wrote:
> > On Fri, Mar 13, 2020 at 01:50:37AM +0200, Vadym Kochan wrote:
> > > Add missing config option name which allows to change it via custom
> > > config.
> >
> > Why? What is your use-case?
>
> I need to allocate buffers bigger than default ZONEORDER, so I tried to
> increase it but it did not work because the config entry has no name.
I try not to make this selectable as we want a single kernel build to
work on all supported hardware. The current values are chosen to allow
huge pages. If you need bigger contiguous allocations, maybe something
like CMA would help.
--
Catalin
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^ permalink raw reply [flat|nested] 4+ messages in thread
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2020-03-12 23:50 [PATCH] arm64: Kconfig: allow to change FORCE_MAX_ZONEORDER via custom config Vadym Kochan
2020-03-13 12:37 ` Catalin Marinas
2020-03-13 12:45 ` Vadym Kochan
2020-03-16 17:42 ` Catalin Marinas
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