From: Luiz Capitulino <lcapitulino@redhat.com>
To: Rusty Russell <rusty@rustcorp.com.au>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
riel@redhat.com, aarcange@redhat.com, aquini@redhat.com,
mst@redhat.com, vdavydov@parallels.com, amit.shah@redhat.com,
dfediuck@redhat.com, alitke@redhat.com
Subject: Re: [RFC PATCH 3/4] virtio_balloon: add pressure notification via a new virtqueue
Date: Thu, 16 Jan 2014 20:43:51 -0500 [thread overview]
Message-ID: <20140116204351.7d48c2b9@redhat.com> (raw)
In-Reply-To: <20140116203819.0e7be6d4@redhat.com>
On Thu, 16 Jan 2014 20:38:19 -0500
Luiz Capitulino <lcapitulino@redhat.com> wrote:
> > What does qemu do with this information?
>
> There are two possible scenarios:
>
> 1. The balloon driver is currently inflating when it gets under
> pressure
>
> QEMU resets "num_pages" to the current balloon size. This
> cancels the on-going inflate
>
> 2. The balloon driver is not inflating, eg. it's possibly sleeping
>
> QEMU issues a deflate
>
> But note that those scenarios are not supposed to be used with the
> current device, they are part of the automatic ballooning feature.
> I CC'ed you on the QEMU patch, you can find it here case you didn't
> see it:
>
> http://marc.info/?l=kvm&m=138988966315690&w=2
By "current device" I meant "outside of automatic ballooning scope".
next prev parent reply other threads:[~2014-01-17 1:43 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-16 16:24 [RFC PATCH 0/4] virtio_balloon: add pressure notification via a new virtqueue Luiz Capitulino
2014-01-16 16:24 ` [RFC PATCH 1/4] vmpressure: in-kernel notifications Luiz Capitulino
2014-01-16 16:24 ` [RFC PATCH 2/4] vmpressure in-kernel: hack Luiz Capitulino
2014-01-16 16:24 ` [RFC PATCH 3/4] virtio_balloon: add pressure notification via a new virtqueue Luiz Capitulino
2014-01-16 22:40 ` Rusty Russell
2014-01-17 1:38 ` Luiz Capitulino
2014-01-17 1:43 ` Luiz Capitulino [this message]
2014-01-20 2:13 ` Rusty Russell
2014-01-20 14:59 ` Luiz Capitulino
2014-01-16 16:24 ` [RFC PATCH 4/4] virtio_balloon: skip inflation if guest is under pressure Luiz Capitulino
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=20140116204351.7d48c2b9@redhat.com \
--to=lcapitulino@redhat.com \
--cc=aarcange@redhat.com \
--cc=alitke@redhat.com \
--cc=amit.shah@redhat.com \
--cc=aquini@redhat.com \
--cc=dfediuck@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mst@redhat.com \
--cc=riel@redhat.com \
--cc=rusty@rustcorp.com.au \
--cc=vdavydov@parallels.com \
/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.