From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Dave McCracken <dcm@mccr.org>
Cc: Xen Developers List <xen-devel@lists.xensource.com>, Mick.Jordan@sun.com
Subject: Re: Design question for PV superpage support
Date: Mon, 02 Mar 2009 17:37:26 -0800 [thread overview]
Message-ID: <49AC89D6.7020701@goop.org> (raw)
In-Reply-To: <200903021314.34075.dcm@mccr.org>
Dave McCracken wrote:
> My understanding of save/restore is that it will save your carefully selected
> 2M pages, cheerfully restore them onto a random set of mfns, then expect your
> guest to continue running. I haven't studied it enough to know whether your
> guest at least gets a chance to intervene and fix things after the restore.
Your guest would need to be in the position to allocate an extra 512 L1
pte pages to replace each shattered 2M page, which could be awkward -
and wouldn't have any realistic way to continue if it fails to do so.
Perhaps some kind of special pool of pages could be provided to the
domain to help it satisfy its memory needs in recovering from a
restore-shattered large page.
J
next prev parent reply other threads:[~2009-03-03 1:37 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-02 13:54 Design question for PV superpage support Dave McCracken
2009-03-02 13:58 ` Keir Fraser
2009-03-02 16:43 ` Mick Jordan
2009-03-02 17:06 ` Keir Fraser
2009-03-02 18:02 ` Mick Jordan
2009-03-02 17:29 ` Dave McCracken
2009-03-02 17:52 ` Keir Fraser
2009-03-02 18:03 ` Dan Magenheimer
2009-03-02 18:30 ` Keir Fraser
2009-03-02 18:46 ` Mick Jordan
2009-03-02 18:48 ` Dan Magenheimer
2009-03-02 19:04 ` Keir Fraser
2009-03-02 17:45 ` Mick Jordan
2009-03-02 17:54 ` Keir Fraser
2009-03-02 18:00 ` Dave McCracken
2009-03-02 18:14 ` Mick Jordan
2009-03-02 19:14 ` Dave McCracken
2009-03-03 1:37 ` Jeremy Fitzhardinge [this message]
2009-03-03 3:59 ` Mick Jordan
2009-03-03 14:33 ` Dan Magenheimer
2009-03-03 17:06 ` Mick Jordan
2009-03-03 17:23 ` Jeremy Fitzhardinge
2009-03-03 18:10 ` Keir Fraser
2009-03-03 17:28 ` Jeremy Fitzhardinge
2009-03-03 18:09 ` Dan Magenheimer
2009-03-03 17:26 ` Jeremy Fitzhardinge
2009-03-03 1:32 ` Jeremy Fitzhardinge
2009-03-03 1:15 ` Jeremy Fitzhardinge
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