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From: "Jan Beulich" <JBeulich@novell.com>
To: Jeremy Fitzhardinge <jeremy@goop.org>,
	Dan Magenheimer <dan.magenheimer@oracle.com>
Cc: Konrad Wilk <konrad.wilk@oracle.com>,
	Xen-devel@lists.xensource.com, Daniel Kiper <dkiper@net-space.pl>,
	Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Subject: Re: RE: Ballooning up
Date: Tue, 14 Sep 2010 09:41:11 +0100	[thread overview]
Message-ID: <4C8F51470200007800015EEA@vpn.id2.novell.com> (raw)
In-Reply-To: <4C8EAB0E.7040407@goop.org>

 >>> On 14.09.10 at 00:51, Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> I guess there are three options:
> 
>    1. add a "xen_maxmem" (or something) kernel parameter to override
>       space specified in the E820 table

Isn't that what the (native) "mem=" option is intended for?

>    2. ignore E820 if its a privileged domain

I think this upper limit specified by the machine E820 should be
ignored here, and an option (as per 1.) should be available.

>    3. only allow extra memory up to a certain ratio of the base memory
>       (8x? 16x? 32x?)

Enforcing a sane upper limit of the ratio (we use 32x currently)
seems like a reasonable thing to do in any case.

Jan

  parent reply	other threads:[~2010-09-14  8:41 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-09-07  8:36 Ballooning up Jeremy Fitzhardinge
     [not found] ` <54eebb3a-f539-43be-8134-a969a4f671c4@default4C8EAB0E.7040407@goop.org>
2010-09-07 10:14 ` Ian Campbell
2010-09-07 13:26   ` Jeremy Fitzhardinge
2010-09-07 14:10     ` Ian Campbell
2010-09-15 21:47     ` Dan Magenheimer
2010-09-15 22:41       ` Jeremy Fitzhardinge
2010-09-13 21:17 ` Dan Magenheimer
2010-09-13 21:39   ` Dan Magenheimer
2010-09-13 23:06     ` Jeremy Fitzhardinge
2010-09-13 22:51   ` Jeremy Fitzhardinge
2010-09-14  0:22     ` Dan Magenheimer
2010-09-14  0:46       ` Jeremy Fitzhardinge
2010-09-14 15:06         ` Dan Magenheimer
2010-09-14 22:05           ` Jeremy Fitzhardinge
2010-09-15  7:13             ` Ian Campbell
2010-09-14  8:41     ` Jan Beulich [this message]
2010-09-14 16:35       ` Jeremy Fitzhardinge
2010-09-14  9:07     ` Ian Campbell
2010-09-14 16:42       ` Jeremy Fitzhardinge
2010-09-15  7:10         ` Ian Campbell
2010-09-15 17:29           ` Jeremy Fitzhardinge
2010-09-15 18:06             ` Dan Magenheimer
2010-09-15 20:29               ` Jeremy Fitzhardinge
2010-09-14  8:34   ` Ian Campbell

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