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From: "James Harper" <james.harper@bendigoit.com.au>
To: Paul Durrant <Paul.Durrant@citrix.com>,
	Tim Deegan <Tim.Deegan@eu.citrix.com>
Cc: George Dunlap <George.Dunlap@eu.citrix.com>,
	xen devel <xen-devel@lists.xensource.com>
Subject: RE: what happens when a PoD page is touched?
Date: Mon, 16 May 2011 19:22:50 +1000	[thread overview]
Message-ID: <AEC6C66638C05B468B556EA548C1A77D01D570EB@trantor> (raw)
In-Reply-To: <291EDFCB1E9E224A99088639C4762022B37FC178F9@LONPMAILBOX01.citrite.net>

> > -----Original Message-----
> [snip]
> >
> > Ideally, once Hyper-V brings in an interface for dynamic memory
> > ballooning in guests, we can use that and avoid this whole rigmarole
> > for new windows version.
> >
> 
> Yes, it would be nice if newer viridian-aware kernels did not
zero-scrub
> memory at start of day. This was certainly not what we observed with
original
> windows 7 kernels, which relied on the zero-scrubbing having been done
where
> older kernels did not (particularly when setting up pagetables IIRC).
That
> pre-dates ballooning in hyper-V of course so I guess it'd be worth
examining
> the behaviour of an SP1 system at start of day.
> 

I've not seen any slowdown on boot with any version of Windows until I
go to actually do the balloon down...

James

  reply	other threads:[~2011-05-16  9:22 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-15 10:16 what happens when a PoD page is touched? James Harper
2011-05-16  8:39 ` Tim Deegan
2011-05-16  9:16   ` Paul Durrant
2011-05-16  9:21     ` James Harper
2011-05-16  9:17   ` James Harper
2011-05-16  9:39     ` Tim Deegan
2011-05-16  9:21   ` Paul Durrant
2011-05-16  9:22     ` James Harper [this message]
2011-05-16  9:27       ` Paul Durrant
2011-05-16 23:39         ` James Harper
2011-05-17  9:28           ` Paul Durrant
2011-05-17  9:37             ` James Harper
2011-05-17 13:00               ` George Dunlap
2011-05-18  4:52                 ` James Harper
2011-05-18  5:20                   ` James Harper
2011-05-18 10:23                   ` Jan Beulich
2011-05-17 11:32             ` George Dunlap
2011-05-16 10:05       ` George Dunlap
2011-05-16 23:42         ` James Harper

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