From: Avi Kivity <avi@redhat.com>
To: tfjellstrom@shaw.ca
Cc: kvm@vger.kernel.org, dlaor@redhat.com
Subject: Re: automatic memory ballooning?
Date: Mon, 17 Aug 2009 14:35:12 +0300 [thread overview]
Message-ID: <4A894070.9080402@redhat.com> (raw)
In-Reply-To: <200908170449.40945.tfjellstrom@shaw.ca>
On 08/17/2009 01:49 PM, Thomas Fjellstrom wrote:
> One thing I found odd about kvm's ballooning is that it actually seems to
> change how much ram the guest has. I really didn't expect "free -m" to report
> that the guest only had 64M ram after I manually ballooned the ram. I was
> however expecting it just to free ram it wasn't using in the host. To me, it
> just doesn't seem to be the same thing. now it'll start swapping at 64M ram
> instead of just reallocating the ram it used to have.
>
You expectations aren't realistic. kvm never allocates the ram the
guest doesn't use in the first place. Ballooning just the "free"
memory is pointless since it's usually a very small amount.
It may be worthwhile for the guest to give up that memory voluntarily
though.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2009-08-17 11:35 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-16 9:55 automatic memory ballooning? Thomas Fjellstrom
2009-08-16 11:32 ` Avi Kivity
2009-08-16 14:18 ` Thomas Fjellstrom
2009-08-16 14:30 ` Avi Kivity
2009-08-16 15:07 ` Dor Laor
2009-08-17 10:49 ` Thomas Fjellstrom
2009-08-17 11:35 ` Avi Kivity [this message]
2009-08-17 12:32 ` Thomas Fjellstrom
2009-08-17 12:46 ` Avi Kivity
2009-08-17 12:33 ` Thomas Fjellstrom
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