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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4A894070.9080402@redhat.com \
--to=avi@redhat.com \
--cc=dlaor@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=tfjellstrom@shaw.ca \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.