From: "Li, Liang Z" <liang.z.li@intel.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>,
Roman Kagan <rkagan@virtuozzo.com>,
"ehabkost@redhat.com" <ehabkost@redhat.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"quintela@redhat.com" <quintela@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"amit.shah@redhat.com" <amit.shah@redhat.com>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"virtualization@lists.linux-foundation.org"
<virtualization@lists.linux-foundation.org>,
"rth@twiddle.net" <rth@twiddle.net>
Subject: RE: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization
Date: Tue, 8 Mar 2016 14:17:59 +0000 [thread overview]
Message-ID: <F2CBF3009FA73547804AE4C663CAB28E041481F9@shsmsx102.ccr.corp.intel.com> (raw)
In-Reply-To: <20160308160145-mutt-send-email-mst@redhat.com>
> On Fri, Mar 04, 2016 at 03:13:03PM +0000, Li, Liang Z wrote:
> > > > Maybe I am not clear enough.
> > > >
> > > > I mean if we inflate balloon before live migration, for a 8GB
> > > > guest, it takes
> > > about 5 Seconds for the inflating operation to finish.
> > >
> > > And these 5 seconds are spent where?
> > >
> >
> > The time is spent on allocating the pages and send the allocated pages
> > pfns to QEMU through virtio.
>
> What if we skip allocating pages but use the existing interface to send pfns to
> QEMU?
>
I think it will be much faster, allocating pages is the main reason for the long time of the operation.
Experiment is needed to get the exact time spend on sending the pfns.
Liang
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next prev parent reply other threads:[~2016-03-08 14:18 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-03 10:44 Liang Li
2016-03-03 10:44 ` [RFC qemu 1/4] pc: Add code to get the lowmem form PCMachineState Liang Li
2016-03-03 10:44 ` [RFC qemu 2/4] virtio-balloon: Add a new feature to balloon device Liang Li
2016-03-03 12:23 ` Cornelia Huck
2016-03-04 2:38 ` Li, Liang Z
2016-03-03 12:56 ` Michael S. Tsirkin
2016-03-04 2:29 ` Li, Liang Z
2016-03-03 10:44 ` [RFC qemu 3/4] migration: not set migration bitmap in setup stage Liang Li
2016-03-03 10:44 ` [RFC qemu 4/4] migration: filter out guest's free pages in ram bulk stage Liang Li
2016-03-03 12:16 ` Cornelia Huck
2016-03-04 2:32 ` Li, Liang Z
2016-03-03 12:45 ` [Qemu-devel] " Daniel P. Berrange
2016-03-04 2:43 ` Li, Liang Z
2016-03-03 13:58 ` [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization Roman Kagan
2016-03-04 1:35 ` Li, Liang Z
2016-03-03 17:46 ` Dr. David Alan Gilbert
2016-03-04 1:52 ` Li, Liang Z
2016-03-04 8:14 ` [Qemu-devel] " Roman Kagan
2016-03-04 9:08 ` Li, Liang Z
2016-03-04 10:23 ` Roman Kagan
2016-03-04 14:26 ` Li, Liang Z
2016-03-04 14:45 ` Michael S. Tsirkin
2016-03-04 15:49 ` Li, Liang Z
2016-03-05 19:55 ` Michael S. Tsirkin
2016-03-07 6:49 ` Li, Liang Z
2016-03-07 11:40 ` Michael S. Tsirkin
2016-03-07 15:06 ` Li, Liang Z
2016-03-09 14:28 ` Roman Kagan
2016-03-09 15:27 ` Li, Liang Z
2016-03-09 15:30 ` Michael S. Tsirkin
2016-03-10 1:41 ` Li, Liang Z
2016-03-10 12:29 ` Michael S. Tsirkin
2016-03-09 15:41 ` Michael S. Tsirkin
2016-03-09 17:04 ` Roman Kagan
2016-03-09 17:39 ` Michael S. Tsirkin
2016-03-10 10:21 ` Roman Kagan
2016-03-09 19:38 ` Rik van Riel
2016-03-10 9:30 ` Roman Kagan
2016-03-04 16:24 ` Paolo Bonzini
2016-03-04 18:51 ` Dr. David Alan Gilbert
2016-03-07 5:34 ` Li, Liang Z
2016-03-09 13:22 ` Roman Kagan
2016-03-09 14:19 ` Li, Liang Z
2016-03-09 6:18 ` Li, Liang Z
2016-03-04 7:55 ` Roman Kagan
2016-03-04 8:23 ` Li, Liang Z
2016-03-04 8:35 ` Roman Kagan
2016-03-04 9:08 ` Dr. David Alan Gilbert
2016-03-04 9:12 ` Li, Liang Z
2016-03-04 9:47 ` Michael S. Tsirkin
2016-03-04 10:11 ` Li, Liang Z
2016-03-04 10:36 ` Michael S. Tsirkin
2016-03-04 15:13 ` Li, Liang Z
2016-03-08 14:03 ` Michael S. Tsirkin
2016-03-08 14:17 ` Li, Liang Z [this message]
2016-03-04 9:35 ` Roman Kagan
2016-03-08 11:13 ` Amit Shah
2016-03-08 13:11 ` Li, Liang Z
2016-03-10 7:44 ` Li, Liang Z
2016-03-10 7:57 ` Amit Shah
2016-03-10 8:36 ` Li, Liang Z
2016-03-10 11:18 ` Dr. David Alan Gilbert
2016-03-11 2:38 ` Li, Liang Z
2016-03-14 17:03 ` Dr. David Alan Gilbert
2016-03-15 3:31 ` Li, Liang Z
2016-03-15 10:29 ` Michael S. Tsirkin
2016-03-15 11:11 ` Li, Liang Z
2016-03-15 19:55 ` Dr. David Alan Gilbert
2016-03-16 1:20 ` Li, Liang Z
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