* [PATCH] powerpc: Make KVM_GUEST default to n
@ 2011-08-05 3:23 Anton Blanchard
2011-08-09 11:58 ` Alexander Graf
0 siblings, 1 reply; 2+ messages in thread
From: Anton Blanchard @ 2011-08-05 3:23 UTC (permalink / raw)
To: benh, paulus, agraf; +Cc: linuxppc-dev
KVM_GUEST adds a 1 MB array to the kernel (kvm_tmp) which grew
my kernel enough to cause it to fail to boot.
Dynamically allocating or reducing the size of this array is a
good idea, but in the meantime I think it makes sense to make
KVM_GUEST default to n in order to minimise surprises.
Signed-off-by: Anton Blanchard <anton@samba.org>
---
Index: linux-powerpc/arch/powerpc/platforms/Kconfig
===================================================================
--- linux-powerpc.orig/arch/powerpc/platforms/Kconfig 2011-08-01 17:33:46.120121554 +1000
+++ linux-powerpc/arch/powerpc/platforms/Kconfig 2011-08-01 17:35:06.921772044 +1000
@@ -24,7 +24,7 @@ source "arch/powerpc/platforms/wsp/Kconf
config KVM_GUEST
bool "KVM Guest support"
- default y
+ default n
---help---
This option enables various optimizations for running under the KVM
hypervisor. Overhead for the kernel when not running inside KVM should
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] powerpc: Make KVM_GUEST default to n
2011-08-05 3:23 [PATCH] powerpc: Make KVM_GUEST default to n Anton Blanchard
@ 2011-08-09 11:58 ` Alexander Graf
0 siblings, 0 replies; 2+ messages in thread
From: Alexander Graf @ 2011-08-09 11:58 UTC (permalink / raw)
To: Anton Blanchard; +Cc: paulus, linuxppc-dev
On 08/05/2011 05:23 AM, Anton Blanchard wrote:
> KVM_GUEST adds a 1 MB array to the kernel (kvm_tmp) which grew
> my kernel enough to cause it to fail to boot.
>
> Dynamically allocating or reducing the size of this array is a
> good idea, but in the meantime I think it makes sense to make
> KVM_GUEST default to n in order to minimise surprises.
>
> Signed-off-by: Anton Blanchard<anton@samba.org>
Hrm - the idea was that the code is so little intrusive that it could
simply always be enabled. But yeah, maybe this should be default n.
Ben, could you please pull this into your ppc tree for now? I don't
think I'll manage to clean up my tree and send out a pull request before
KVM Forum.
Alex
> ---
>
> Index: linux-powerpc/arch/powerpc/platforms/Kconfig
> ===================================================================
> --- linux-powerpc.orig/arch/powerpc/platforms/Kconfig 2011-08-01 17:33:46.120121554 +1000
> +++ linux-powerpc/arch/powerpc/platforms/Kconfig 2011-08-01 17:35:06.921772044 +1000
> @@ -24,7 +24,7 @@ source "arch/powerpc/platforms/wsp/Kconf
>
> config KVM_GUEST
> bool "KVM Guest support"
> - default y
> + default n
> ---help---
> This option enables various optimizations for running under the KVM
> hypervisor. Overhead for the kernel when not running inside KVM should
^ permalink raw reply [flat|nested] 2+ messages in thread
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2011-08-05 3:23 [PATCH] powerpc: Make KVM_GUEST default to n Anton Blanchard
2011-08-09 11:58 ` Alexander Graf
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