linux-kernel - Re: [PATCH 1/2] xen: expand BALLOON_MEMORY

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Message-ID: <20200324151855.GN24458@Air-de-Roger.citrite.net>
Date:   Tue, 24 Mar 2020 16:18:55 +0100
From:   Roger Pau Monné <roger.pau@...rix.com>
To:     Jürgen Groß <jgross@...e.com>
CC:     <linux-kernel@...r.kernel.org>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        <xen-devel@...ts.xenproject.org>
Subject: Re: [PATCH 1/2] xen: expand BALLOON_MEMORY_HOTPLUG description

On Tue, Mar 24, 2020 at 04:13:48PM +0100, Jürgen Groß wrote:
> On 24.03.20 16:00, Roger Pau Monne wrote:
> > To mention it's also useful for PVH or HVM domains that require
> > mapping foreign memory or grants.
> > 
> > Signed-off-by: Roger Pau Monné <roger.pau@...rix.com>
> > ---
> > Cc: Boris Ostrovsky <boris.ostrovsky@...cle.com>
> > Cc: Juergen Gross <jgross@...e.com>
> > Cc: Stefano Stabellini <sstabellini@...nel.org>
> > Cc: xen-devel@...ts.xenproject.org
> > ---
> >   drivers/xen/Kconfig | 4 ++++
> >   1 file changed, 4 insertions(+)
> > 
> > diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
> > index 61212fc7f0c7..57ddd6f4b729 100644
> > --- a/drivers/xen/Kconfig
> > +++ b/drivers/xen/Kconfig
> > @@ -19,6 +19,10 @@ config XEN_BALLOON_MEMORY_HOTPLUG
> >   	  It is very useful on critical systems which require long
> >   	  run without rebooting.
> > +	  It's also very useful for translated domains (PVH or HVM) to obtain
> 
> I'd rather say "(non PV)" or "(PVH, HVM or Arm)".

I'm fine with any of the variants. Would you mind adjusting when
picking it up or would you like me to resend?

> > +	  unpopulated physical memory ranges to use in order to map foreign
> > +	  memory or grants.
> > +
> >   	  Memory could be hotplugged in following steps:
> >   	    1) target domain: ensure that memory auto online policy is in
> > 
> 
> With that:
> 
> Reviewed-by: Juergen Gross <jgross@...e.com>

Thanks!