From: "Li, Liang Z" <liang.z.li@intel.com>
To: Rik van Riel <riel@redhat.com>, "mst@redhat.com" <mst@redhat.com>,
"viro@zeniv.linux.org.uk" <viro@zeniv.linux.org.uk>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"quintela@redhat.com" <quintela@redhat.com>,
"amit.shah@redhat.com" <amit.shah@redhat.com>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"dgilbert@redhat.com" <dgilbert@redhat.com>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"agraf@suse.de" <agraf@suse.de>,
"borntraeger@de.ibm.com" <borntraeger@de.ibm.com>
Subject: RE: [PATCH kernel 1/2] mm: add the related functions to build the free page bitmap
Date: Tue, 19 Apr 2016 15:02:09 +0000 [thread overview]
Message-ID: <F2CBF3009FA73547804AE4C663CAB28E04182594@shsmsx102.ccr.corp.intel.com> (raw)
In-Reply-To: <1461077659.3200.8.camel@redhat.com>
> On Tue, 2016-04-19 at 22:34 +0800, Liang Li wrote:
> > The free page bitmap will be sent to QEMU through virtio interface and
> > used for live migration optimization.
> > Drop the cache before building the free page bitmap can get more free
> > pages. Whether dropping the cache is decided by user.
> >
>
> How do you prevent the guest from using those recently-freed pages for
> something else, between when you build the bitmap and the live migration
> completes?
Because the dirty page logging is enabled before building the bitmap, there is no need
to prevent the guest from using the recently-freed pages ...
Liang
WARNING: multiple messages have this Message-ID (diff)
From: "Li, Liang Z" <liang.z.li@intel.com>
To: Rik van Riel <riel@redhat.com>, "mst@redhat.com" <mst@redhat.com>,
"viro@zeniv.linux.org.uk" <viro@zeniv.linux.org.uk>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"quintela@redhat.com" <quintela@redhat.com>,
"amit.shah@redhat.com" <amit.shah@redhat.com>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"dgilbert@redhat.com" <dgilbert@redhat.com>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"agraf@suse.de" <agraf@suse.de>,
"borntraeger@de.ibm.com" <borntraeger@de.ibm.com>
Subject: Re: [Qemu-devel] [PATCH kernel 1/2] mm: add the related functions to build the free page bitmap
Date: Tue, 19 Apr 2016 15:02:09 +0000 [thread overview]
Message-ID: <F2CBF3009FA73547804AE4C663CAB28E04182594@shsmsx102.ccr.corp.intel.com> (raw)
In-Reply-To: <1461077659.3200.8.camel@redhat.com>
> On Tue, 2016-04-19 at 22:34 +0800, Liang Li wrote:
> > The free page bitmap will be sent to QEMU through virtio interface and
> > used for live migration optimization.
> > Drop the cache before building the free page bitmap can get more free
> > pages. Whether dropping the cache is decided by user.
> >
>
> How do you prevent the guest from using those recently-freed pages for
> something else, between when you build the bitmap and the live migration
> completes?
Because the dirty page logging is enabled before building the bitmap, there is no need
to prevent the guest from using the recently-freed pages ...
Liang
next prev parent reply other threads:[~2016-04-19 15:03 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-19 14:34 [PATCH kernel 0/2] speed up live migration by skipping free pages Liang Li
2016-04-19 14:34 ` [Qemu-devel] " Liang Li
2016-04-19 14:34 ` Liang Li
2016-04-19 14:34 ` [PATCH kernel 1/2] mm: add the related functions to build the free page bitmap Liang Li
2016-04-19 14:34 ` [Qemu-devel] " Liang Li
2016-04-19 14:34 ` Liang Li
2016-04-19 14:54 ` Rik van Riel
2016-04-19 14:54 ` [Qemu-devel] " Rik van Riel
2016-04-19 14:54 ` Rik van Riel
2016-04-19 15:02 ` Li, Liang Z [this message]
2016-04-19 15:02 ` [Qemu-devel] " Li, Liang Z
2016-04-19 15:26 ` Rik van Riel
2016-04-19 15:26 ` [Qemu-devel] " Rik van Riel
2016-04-19 15:26 ` Rik van Riel
2016-04-20 0:57 ` Li, Liang Z
2016-04-20 0:57 ` [Qemu-devel] " Li, Liang Z
2016-04-19 16:15 ` Michael S. Tsirkin
2016-04-19 16:15 ` [Qemu-devel] " Michael S. Tsirkin
2016-04-19 16:15 ` Michael S. Tsirkin
2016-04-20 1:41 ` Li, Liang Z
2016-04-20 1:41 ` [Qemu-devel] " Li, Liang Z
2016-04-20 1:41 ` Li, Liang Z
2016-04-20 1:41 ` Li, Liang Z
2016-04-21 13:48 ` Michael S. Tsirkin
2016-04-21 13:48 ` [Qemu-devel] " Michael S. Tsirkin
2016-04-21 13:48 ` Michael S. Tsirkin
2016-04-22 1:36 ` Li, Liang Z
2016-04-22 1:36 ` [Qemu-devel] " Li, Liang Z
2016-04-22 1:36 ` Li, Liang Z
2016-04-22 9:48 ` Dr. David Alan Gilbert
2016-04-22 9:48 ` [Qemu-devel] " Dr. David Alan Gilbert
2016-04-22 9:48 ` Dr. David Alan Gilbert
2016-04-22 13:58 ` Michael S. Tsirkin
2016-04-22 13:58 ` [Qemu-devel] " Michael S. Tsirkin
2016-04-22 13:58 ` Michael S. Tsirkin
2016-04-25 3:11 ` Li, Liang Z
2016-04-25 3:11 ` [Qemu-devel] " Li, Liang Z
2016-04-25 3:11 ` Li, Liang Z
2016-04-25 10:43 ` Michael S. Tsirkin
2016-04-25 10:43 ` [Qemu-devel] " Michael S. Tsirkin
2016-04-25 10:43 ` Michael S. Tsirkin
2016-04-26 3:21 ` Li, Liang Z
2016-04-26 3:21 ` [Qemu-devel] " Li, Liang Z
2016-04-26 3:21 ` Li, Liang Z
2016-04-19 14:56 ` kbuild test robot
2016-04-19 14:56 ` [Qemu-devel] " kbuild test robot
2016-04-19 14:56 ` kbuild test robot
2016-04-19 16:01 ` kbuild test robot
2016-04-19 16:01 ` [Qemu-devel] " kbuild test robot
2016-04-19 16:01 ` kbuild test robot
2016-04-19 16:14 ` kbuild test robot
2016-04-19 16:14 ` [Qemu-devel] " kbuild test robot
2016-04-19 16:14 ` kbuild test robot
2016-04-19 14:34 ` [PATCH kernel 2/2] virtio-balloon: extend balloon driver to support the new feature Liang Li
2016-04-19 14:34 ` [Qemu-devel] " Liang Li
2016-04-19 14:34 ` Liang Li
2016-04-19 16:18 ` Michael S. Tsirkin
2016-04-19 16:18 ` [Qemu-devel] " Michael S. Tsirkin
2016-04-19 16:18 ` Michael S. Tsirkin
2016-04-25 6:06 ` [PATCH kernel 0/2] speed up live migration by skipping free pages Amit Shah
2016-04-25 6:06 ` [Qemu-devel] " Amit Shah
2016-04-25 6:06 ` Amit Shah
2016-04-25 11:04 ` Michael S. Tsirkin
2016-04-25 11:04 ` [Qemu-devel] " Michael S. Tsirkin
2016-04-25 11:04 ` Michael S. Tsirkin
2016-04-25 12:08 ` Amit Shah
2016-04-25 12:08 ` [Qemu-devel] " Amit Shah
2016-04-25 12:08 ` Amit Shah
2016-04-25 12:51 ` Michael S. Tsirkin
2016-04-25 12:51 ` [Qemu-devel] " Michael S. Tsirkin
2016-04-25 12:51 ` Michael S. Tsirkin
2016-04-25 13:17 ` Dr. David Alan Gilbert
2016-04-25 13:17 ` [Qemu-devel] " Dr. David Alan Gilbert
2016-04-25 13:17 ` Dr. David Alan Gilbert
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