[PATCH V2] Doc: admin-guide: Add entry for kvm_cma_resv_ratio kernel param
Randy Dunlap
rdunlap at infradead.org
Tue Sep 22 01:58:00 AEST 2020
On 9/21/20 2:02 AM, sathnaga at linux.vnet.ibm.com wrote:
> From: Satheesh Rajendran <sathnaga at linux.vnet.ibm.com>
>
> Add document entry for kvm_cma_resv_ratio kernel param which
> is used to alter the KVM contiguous memory allocation percentage
> for hash pagetable allocation used by hash mode PowerPC KVM guests.
>
> Cc: linux-kernel at vger.kernel.org
> Cc: kvm-ppc at vger.kernel.org
> Cc: linuxppc-dev at lists.ozlabs.org
> Cc: Paul Mackerras <paulus at samba.org>
> Cc: Michael Ellerman <mpe at ellerman.id.au>
> Cc: Jonathan Corbet <corbet at lwn.net>
> Reviewed-by: Randy Dunlap <rdunlap at infradead.org>
> Signed-off-by: Satheesh Rajendran <sathnaga at linux.vnet.ibm.com>
Hi,
> ---
>
> V2:
> Addressed review comments from Randy.
>
> V1: https://lkml.org/lkml/2020/9/16/72
In reply to V1, I didn't add a Reviewed-by: tag, but I can now.
Reviewed-by: Randy Dunlap <rdunlap at infradead.org>
> ---
> Documentation/admin-guide/kernel-parameters.txt | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index a1068742a6df..932ed45740c9 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -2258,6 +2258,14 @@
> [KVM,ARM] Allow use of GICv4 for direct injection of
> LPIs.
>
> + kvm_cma_resv_ratio=n [PPC]
> + Reserves given percentage from system memory area for
> + contiguous memory allocation for KVM hash pagetable
> + allocation.
> + By default it reserves 5% of total system memory.
> + Format: <integer>
> + Default: 5
> +
> kvm-intel.ept= [KVM,Intel] Disable extended page tables
> (virtualized MMU) support on capable Intel chips.
> Default is 1 (enabled)
>
thanks.
--
~Randy
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