Re: [Xen-devel] Is there an issue with turning off "scrubbing free RAM" on boot with Xen 4.1.3

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Wed, Oct 09, 2013 at 11:24:22AM -0700, Roddy Rodstein wrote:
>    Greetings,
> 
>    Thank you in advance for your support!
> 
>    Our HP Xen 4.1.3 servers have 1TB of RAM, each Xen servers take 20 minutes
>    to boot largely due to the "scrub free RAM" phase. If/when we have dom0
>    failures and HA kicks-in, we would like to reduce the boot time to make
>    the resource quickly available, perhaps using the no-bootscrub attribute
>    in grub.conf.
> 
>    Could you please share your comments about turning of RAM scrubbing, i.e.
>    have you seen any consequences, security issues and/or threats, red flags,
>    etc...?
> 
>    We have asked the same question at the commercially supported Xen forums,
>    i.e. Oracle and Citrix, as well as to each aforementioned support team,
>    and have not received a lick of meaningful information.
>

If that's a custom build of Xen you can apply the patches that optimize the 
boot time memory scrubbing,
they've been posted to xen-devel a couple of times.. 

-- Pasi
 
> 
> 
>    Respectfully,
> 
>    Roddy
> 
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