linux-kernel - Re: [PATCH] Doc: admin-guide: Add entry for kvm_cma_resv

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Date:   Wed, 16 Sep 2020 13:31:52 +0530
From:   Satheesh Rajendran <sathnaga@...ux.vnet.ibm.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     sathnaga@...ux.vnet.ibm.com, linux-doc@...r.kernel.org,
        Jonathan Corbet <corbet@....net>, linux-kernel@...r.kernel.org,
        kvm-ppc@...r.kernel.org, Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH] Doc: admin-guide: Add entry for kvm_cma_resv_ratio
 kernel param

Hi Randy,

Thanks for the comments, will send a V2 fixing them.

On Tue, Sep 15, 2020 at 11:18:52PM -0700, Randy Dunlap wrote:
> On 9/15/20 11:11 PM, sathnaga@...ux.vnet.ibm.com wrote:
> > From: Satheesh Rajendran <sathnaga@...ux.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@...r.kernel.org
> > Cc: kvm-ppc@...r.kernel.org
> > Cc: linuxppc-dev@...ts.ozlabs.org
> > Cc: Paul Mackerras <paulus@...ba.org>
> > Cc: Michael Ellerman <mpe@...erman.id.au>
> > Cc: Jonathan Corbet <corbet@....net>  
> > Signed-off-by: Satheesh Rajendran <sathnaga@...ux.vnet.ibm.com>
> > ---
> >  Documentation/admin-guide/kernel-parameters.txt | 9 +++++++++
> >  1 file changed, 9 insertions(+)
> > 
> > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> > index a1068742a6df..9cb126573c71 100644
> > --- a/Documentation/admin-guide/kernel-parameters.txt
> > +++ b/Documentation/admin-guide/kernel-parameters.txt
> > @@ -599,6 +599,15 @@
> >  			altogether. For more information, see
> >  			include/linux/dma-contiguous.h
> >  
> > +        kvm_cma_resv_ratio=n
> > +                        [PPC]
> 
> You can put [PPC] on the line above.
> 
sure
> > +                        Reserves given percentage from system memory area for
> > +                        contiguous memory allocation for KVM hash pagetable
> > +                        allocation.
> > +                        Bydefault it reserves 5% of total system memory.
> 
> 			   By default
> 
> > +                        Format: <integer>
> > +                        Default: 5
> > +
> 
> and please use tabs for indentation, not all spaces.
> 
sure
> >  	cmo_free_hint=	[PPC] Format: { yes | no }
> >  			Specify whether pages are marked as being inactive
> >  			when they are freed.  This is used in CMO environments
> > 
> 
> Entries in kernel-parameters.txt should be sorted into dictionary order,
> so please put that with the other kvm parameters.
> 
sure.
> thanks.
> -- 
> ~Randy
> 

Thanks!
-Satheesh.