From: "Michael S. Tsirkin" <mst@redhat.com>
To: Lan Tianyu <tianyu.lan@intel.com>
Cc: a.motakis@virtualopensystems.com, alex.williamson@redhat.com,
b.reynal@virtualopensystems.com, bhelgaas@google.com,
carolyn.wyborny@intel.com, donald.c.skidmore@intel.com,
eddie.dong@intel.com, nrupal.jani@intel.com, agraf@suse.de,
kvm@vger.kernel.org, pbonzini@redhat.com, qemu-devel@nongnu.org,
emil.s.tantilov@intel.com, gerlitz.or@gmail.com,
mark.d.rustad@intel.com, eric.auger@linaro.org,
intel-wired-lan@lists.osuosl.org, jeffrey.t.kirsher@intel.com,
jesse.brandeburg@intel.com, john.ronciak@intel.com,
linux-api@vger.kernel.org, linux-kernel@vger.kernel.org,
matthew.vick@intel.com, mitch.a.williams@intel.com,
netdev@vger.kernel.org, shannon.nelson@intel.com,
weiyang@linux.vnet.ibm.com, zajec5@gmail.com
Subject: Re: [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver
Date: Wed, 25 Nov 2015 14:28:05 +0200 [thread overview]
Message-ID: <20151125142437-mutt-send-email-mst@redhat.com> (raw)
In-Reply-To: <56554994.1090305@intel.com>
On Wed, Nov 25, 2015 at 01:39:32PM +0800, Lan Tianyu wrote:
> On 2015年11月25日 05:20, Michael S. Tsirkin wrote:
> > I have to say, I was much more interested in the idea
> > of tracking dirty memory. I have some thoughts about
> > that one - did you give up on it then?
>
> No, our finial target is to keep VF active before doing
> migration and tracking dirty memory is essential. But this
> seems not easy to do that in short term for upstream. As
> starters, stop VF before migration.
Frankly, I don't really see what this short term hack buys us,
and if it goes in, we'll have to maintain it forever.
Also, assuming you just want to do ifdown/ifup for some reason, it's
easy enough to do using a guest agent, in a completely generic way.
> After deep thinking, the way of stopping VF still needs tracking
> DMA-accessed dirty memory to make sure the received data buffer
> before stopping VF migrated. It's easier to do that via dummy writing
> data buffer when receive packet.
>
>
> --
> Best regards
> Tianyu Lan
WARNING: multiple messages have this Message-ID (diff)
From: "Michael S. Tsirkin" <mst@redhat.com>
To: Lan Tianyu <tianyu.lan@intel.com>
Cc: weiyang@linux.vnet.ibm.com, emil.s.tantilov@intel.com,
kvm@vger.kernel.org, qemu-devel@nongnu.org,
jesse.brandeburg@intel.com, mark.d.rustad@intel.com,
carolyn.wyborny@intel.com, eric.auger@linaro.org,
donald.c.skidmore@intel.com, zajec5@gmail.com, agraf@suse.de,
matthew.vick@intel.com, intel-wired-lan@lists.osuosl.org,
jeffrey.t.kirsher@intel.com, gerlitz.or@gmail.com,
mitch.a.williams@intel.com, nrupal.jani@intel.com,
bhelgaas@google.com, a.motakis@virtualopensystems.com,
b.reynal@virtualopensystems.com, linux-api@vger.kernel.org,
shannon.nelson@intel.com, eddie.dong@intel.com,
alex.williamson@redhat.com, linux-kernel@vger.kernel.org,
john.ronciak@intel.com, netdev@vger.kernel.org,
pbonzini@redhat.com
Subject: Re: [Qemu-devel] [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver
Date: Wed, 25 Nov 2015 14:28:05 +0200 [thread overview]
Message-ID: <20151125142437-mutt-send-email-mst@redhat.com> (raw)
In-Reply-To: <56554994.1090305@intel.com>
On Wed, Nov 25, 2015 at 01:39:32PM +0800, Lan Tianyu wrote:
> On 2015年11月25日 05:20, Michael S. Tsirkin wrote:
> > I have to say, I was much more interested in the idea
> > of tracking dirty memory. I have some thoughts about
> > that one - did you give up on it then?
>
> No, our finial target is to keep VF active before doing
> migration and tracking dirty memory is essential. But this
> seems not easy to do that in short term for upstream. As
> starters, stop VF before migration.
Frankly, I don't really see what this short term hack buys us,
and if it goes in, we'll have to maintain it forever.
Also, assuming you just want to do ifdown/ifup for some reason, it's
easy enough to do using a guest agent, in a completely generic way.
> After deep thinking, the way of stopping VF still needs tracking
> DMA-accessed dirty memory to make sure the received data buffer
> before stopping VF migrated. It's easier to do that via dummy writing
> data buffer when receive packet.
>
>
> --
> Best regards
> Tianyu Lan
WARNING: multiple messages have this Message-ID (diff)
From: "Michael S. Tsirkin" <mst-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Lan Tianyu <tianyu.lan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: a.motakis-lrHrjnjw1UfHK3s98zE1ajGjJy/sRE9J@public.gmane.org,
alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
b.reynal-lrHrjnjw1UfHK3s98zE1ajGjJy/sRE9J@public.gmane.org,
bhelgaas-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org,
carolyn.wyborny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
donald.c.skidmore-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
eddie.dong-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
nrupal.jani-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
agraf-l3A5Bk7waGM@public.gmane.org,
kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
pbonzini-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
qemu-devel-qX2TKyscuCcdnm+yROfE0A@public.gmane.org,
emil.s.tantilov-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
gerlitz.or-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
mark.d.rustad-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
eric.auger-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
intel-wired-lan-qjLDD68F18P21nG7glBr7A@public.gmane.org,
jeffrey.t.kirsher-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
jesse.brandeburg-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
john.ronciak-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
matthew.vick-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
mitch.a.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
shannon.nelson-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
weiyang-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org,
zajec5-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
Subject: Re: [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver
Date: Wed, 25 Nov 2015 14:28:05 +0200 [thread overview]
Message-ID: <20151125142437-mutt-send-email-mst@redhat.com> (raw)
In-Reply-To: <56554994.1090305-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
On Wed, Nov 25, 2015 at 01:39:32PM +0800, Lan Tianyu wrote:
> On 2015年11月25日 05:20, Michael S. Tsirkin wrote:
> > I have to say, I was much more interested in the idea
> > of tracking dirty memory. I have some thoughts about
> > that one - did you give up on it then?
>
> No, our finial target is to keep VF active before doing
> migration and tracking dirty memory is essential. But this
> seems not easy to do that in short term for upstream. As
> starters, stop VF before migration.
Frankly, I don't really see what this short term hack buys us,
and if it goes in, we'll have to maintain it forever.
Also, assuming you just want to do ifdown/ifup for some reason, it's
easy enough to do using a guest agent, in a completely generic way.
> After deep thinking, the way of stopping VF still needs tracking
> DMA-accessed dirty memory to make sure the received data buffer
> before stopping VF migrated. It's easier to do that via dummy writing
> data buffer when receive packet.
>
>
> --
> Best regards
> Tianyu Lan
WARNING: multiple messages have this Message-ID (diff)
From: Michael S. Tsirkin <mst@redhat.com>
To: intel-wired-lan@osuosl.org
Subject: [Intel-wired-lan] [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver
Date: Wed, 25 Nov 2015 14:28:05 +0200 [thread overview]
Message-ID: <20151125142437-mutt-send-email-mst@redhat.com> (raw)
In-Reply-To: <56554994.1090305@intel.com>
On Wed, Nov 25, 2015 at 01:39:32PM +0800, Lan Tianyu wrote:
> On 2015?11?25? 05:20, Michael S. Tsirkin wrote:
> > I have to say, I was much more interested in the idea
> > of tracking dirty memory. I have some thoughts about
> > that one - did you give up on it then?
>
> No, our finial target is to keep VF active before doing
> migration and tracking dirty memory is essential. But this
> seems not easy to do that in short term for upstream. As
> starters, stop VF before migration.
Frankly, I don't really see what this short term hack buys us,
and if it goes in, we'll have to maintain it forever.
Also, assuming you just want to do ifdown/ifup for some reason, it's
easy enough to do using a guest agent, in a completely generic way.
> After deep thinking, the way of stopping VF still needs tracking
> DMA-accessed dirty memory to make sure the received data buffer
> before stopping VF migrated. It's easier to do that via dummy writing
> data buffer when receive packet.
>
>
> --
> Best regards
> Tianyu Lan
next prev parent reply other threads:[~2015-11-25 12:28 UTC|newest]
Thread overview: 173+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-24 13:38 [RFC PATCH V2 0/3] IXGBE/VFIO: Add live migration support for SRIOV NIC Lan Tianyu
2015-11-24 13:38 ` [Intel-wired-lan] " Lan Tianyu
2015-11-24 13:38 ` [Qemu-devel] " Lan Tianyu
2015-11-24 13:38 ` [RFC PATCH V2 1/3] VFIO: Add new ioctl cmd VFIO_GET_PCI_CAP_INFO Lan Tianyu
2015-11-24 13:38 ` [Intel-wired-lan] " Lan Tianyu
2015-11-24 13:38 ` Lan Tianyu
2015-11-24 13:38 ` [Qemu-devel] " Lan Tianyu
2015-11-24 13:38 ` [RFC PATCH V2 2/3] PCI: Add macros for faked PCI migration capability Lan Tianyu
2015-11-24 13:38 ` [Intel-wired-lan] " Lan Tianyu
2015-11-24 13:38 ` Lan Tianyu
2015-11-24 13:38 ` [Qemu-devel] " Lan Tianyu
2015-11-24 13:38 ` [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver Lan Tianyu
2015-11-24 13:38 ` [Intel-wired-lan] " Lan Tianyu
2015-11-24 13:38 ` [Qemu-devel] " Lan Tianyu
2015-11-24 21:20 ` Michael S. Tsirkin
2015-11-24 21:20 ` [Intel-wired-lan] " Michael S. Tsirkin
2015-11-24 21:20 ` [Qemu-devel] " Michael S. Tsirkin
2015-11-25 5:39 ` Alexander Duyck
2015-11-25 5:39 ` [Intel-wired-lan] " Alexander Duyck
2015-11-25 5:39 ` Alexander Duyck
2015-11-25 5:39 ` Alexander Duyck
2015-11-25 5:39 ` [Qemu-devel] " Alexander Duyck
2015-11-25 5:39 ` Lan Tianyu
2015-11-25 5:39 ` [Intel-wired-lan] " Lan Tianyu
2015-11-25 5:39 ` Lan Tianyu
2015-11-25 5:39 ` [Qemu-devel] " Lan Tianyu
2015-11-25 12:28 ` Michael S. Tsirkin [this message]
2015-11-25 12:28 ` [Intel-wired-lan] " Michael S. Tsirkin
2015-11-25 12:28 ` Michael S. Tsirkin
2015-11-25 12:28 ` [Qemu-devel] " Michael S. Tsirkin
2015-11-25 16:02 ` Lan, Tianyu
2015-11-25 16:02 ` [Intel-wired-lan] " Lan, Tianyu
2015-11-25 16:02 ` Lan, Tianyu
2015-11-25 16:02 ` [Qemu-devel] " Lan, Tianyu
2015-11-25 16:22 ` Michael S. Tsirkin
2015-11-25 16:22 ` [Intel-wired-lan] " Michael S. Tsirkin
2015-11-25 16:22 ` [Qemu-devel] " Michael S. Tsirkin
2015-11-25 16:24 ` Alexander Duyck
2015-11-25 16:24 ` [Intel-wired-lan] " Alexander Duyck
2015-11-25 16:24 ` Alexander Duyck
2015-11-25 16:24 ` Alexander Duyck
2015-11-25 16:24 ` [Qemu-devel] " Alexander Duyck
2015-11-25 16:39 ` Michael S. Tsirkin
2015-11-25 16:39 ` [Intel-wired-lan] " Michael S. Tsirkin
2015-11-25 16:39 ` Michael S. Tsirkin
2015-11-25 16:39 ` Michael S. Tsirkin
2015-11-25 16:39 ` [Qemu-devel] " Michael S. Tsirkin
2015-11-25 17:24 ` Alexander Duyck
2015-11-25 17:24 ` [Intel-wired-lan] " Alexander Duyck
2015-11-25 17:24 ` Alexander Duyck
2015-11-25 17:24 ` Alexander Duyck
2015-11-25 17:24 ` [Qemu-devel] " Alexander Duyck
2015-11-24 14:20 ` [RFC PATCH V2 0/3] IXGBE/VFIO: Add live migration support for SRIOV NIC Alexander Duyck
2015-11-24 14:20 ` [Intel-wired-lan] " Alexander Duyck
2015-11-24 14:20 ` [Qemu-devel] " Alexander Duyck
2015-11-25 3:18 ` Lan Tianyu
2015-11-25 3:18 ` [Intel-wired-lan] " Lan Tianyu
2015-11-25 3:18 ` Lan Tianyu
2015-11-25 3:18 ` [Qemu-devel] " Lan Tianyu
2015-11-25 5:30 ` Alexander Duyck
2015-11-25 5:30 ` [Intel-wired-lan] " Alexander Duyck
2015-11-25 5:30 ` Alexander Duyck
2015-11-25 5:30 ` Alexander Duyck
2015-11-25 5:30 ` [Qemu-devel] " Alexander Duyck
2015-11-25 8:21 ` Lan Tianyu
2015-11-25 8:21 ` [Intel-wired-lan] " Lan Tianyu
2015-11-25 8:21 ` Lan Tianyu
2015-11-25 8:21 ` Lan Tianyu
2015-11-25 8:21 ` [Qemu-devel] " Lan Tianyu
2015-11-25 15:32 ` Alexander Duyck
2015-11-25 15:32 ` [Intel-wired-lan] " Alexander Duyck
2015-11-25 15:32 ` Alexander Duyck
2015-11-25 15:32 ` Alexander Duyck
2015-11-25 15:32 ` [Qemu-devel] " Alexander Duyck
2015-11-26 3:15 ` Dong, Eddie
2015-11-26 3:15 ` [Intel-wired-lan] " Dong, Eddie
2015-11-26 3:15 ` Dong, Eddie
2015-11-26 3:15 ` Dong, Eddie
2015-11-26 3:15 ` [Qemu-devel] " Dong, Eddie
2015-11-26 3:56 ` Alexander Duyck
2015-11-26 3:56 ` [Intel-wired-lan] " Alexander Duyck
2015-11-26 3:56 ` Alexander Duyck
2015-11-26 3:56 ` Alexander Duyck
2015-11-26 3:56 ` [Qemu-devel] " Alexander Duyck
2015-11-30 6:53 ` Lan, Tianyu
2015-11-30 6:53 ` [Intel-wired-lan] " Lan, Tianyu
2015-11-30 6:53 ` Lan, Tianyu
2015-11-30 6:53 ` Lan, Tianyu
2015-11-30 6:53 ` [Qemu-devel] " Lan, Tianyu
2015-11-30 16:07 ` Alexander Duyck
2015-11-30 16:07 ` [Intel-wired-lan] " Alexander Duyck
2015-11-30 16:07 ` Alexander Duyck
2015-11-30 16:07 ` [Qemu-devel] " Alexander Duyck
2015-12-01 15:04 ` Lan, Tianyu
2015-12-01 15:04 ` [Intel-wired-lan] " Lan, Tianyu
2015-12-01 15:04 ` Lan, Tianyu
2015-12-01 15:04 ` [Qemu-devel] " Lan, Tianyu
2015-12-01 15:28 ` Michael S. Tsirkin
2015-12-01 15:28 ` [Intel-wired-lan] " Michael S. Tsirkin
2015-12-01 15:28 ` Michael S. Tsirkin
2015-12-01 15:28 ` Michael S. Tsirkin
2015-12-01 15:28 ` [Qemu-devel] " Michael S. Tsirkin
2015-12-01 17:04 ` Alexander Duyck
2015-12-01 17:04 ` [Intel-wired-lan] " Alexander Duyck
2015-12-01 17:04 ` Alexander Duyck
2015-12-01 17:04 ` [Qemu-devel] " Alexander Duyck
2015-12-01 17:37 ` Michael S. Tsirkin
2015-12-01 17:37 ` [Intel-wired-lan] " Michael S. Tsirkin
2015-12-01 17:37 ` Michael S. Tsirkin
2015-12-01 17:37 ` [Qemu-devel] " Michael S. Tsirkin
2015-12-01 18:36 ` Alexander Duyck
2015-12-01 18:36 ` [Intel-wired-lan] " Alexander Duyck
2015-12-01 18:36 ` Alexander Duyck
2015-12-01 18:36 ` [Qemu-devel] " Alexander Duyck
2015-12-02 11:44 ` Michael S. Tsirkin
2015-12-02 11:44 ` [Intel-wired-lan] " Michael S. Tsirkin
2015-12-02 11:44 ` Michael S. Tsirkin
2015-12-02 11:44 ` [Qemu-devel] " Michael S. Tsirkin
2015-12-04 16:32 ` Lan, Tianyu
2015-12-04 16:32 ` [Intel-wired-lan] " Lan, Tianyu
2015-12-04 16:32 ` Lan, Tianyu
2015-12-04 16:32 ` Lan, Tianyu
2015-12-04 16:32 ` [Qemu-devel] " Lan, Tianyu
2015-12-04 17:07 ` Alexander Duyck
2015-12-04 17:07 ` [Intel-wired-lan] " Alexander Duyck
2015-12-04 17:07 ` Alexander Duyck
2015-12-04 17:07 ` Alexander Duyck
2015-12-04 17:07 ` [Qemu-devel] " Alexander Duyck
2015-12-07 15:40 ` Lan, Tianyu
2015-12-07 15:40 ` [Intel-wired-lan] " Lan, Tianyu
2015-12-07 15:40 ` Lan, Tianyu
2015-12-07 15:40 ` Lan, Tianyu
2015-12-07 15:40 ` [Qemu-devel] " Lan, Tianyu
2015-12-07 17:12 ` Alexander Duyck
2015-12-07 17:12 ` [Intel-wired-lan] " Alexander Duyck
2015-12-07 17:12 ` Alexander Duyck
2015-12-07 17:12 ` [Qemu-devel] " Alexander Duyck
2015-12-07 17:39 ` Michael S. Tsirkin
2015-12-07 17:39 ` [Intel-wired-lan] " Michael S. Tsirkin
2015-12-07 17:39 ` Michael S. Tsirkin
2015-12-07 17:39 ` [Qemu-devel] " Michael S. Tsirkin
2015-12-07 18:42 ` Alexander Duyck
2015-12-07 18:42 ` [Intel-wired-lan] " Alexander Duyck
2015-12-07 18:42 ` Alexander Duyck
2015-12-07 18:42 ` [Qemu-devel] " Alexander Duyck
2015-12-09 9:28 ` Lan, Tianyu
2015-12-09 9:28 ` [Intel-wired-lan] " Lan, Tianyu
2015-12-09 9:28 ` Lan, Tianyu
2015-12-09 9:28 ` [Qemu-devel] " Lan, Tianyu
2015-12-09 16:36 ` Alexander Duyck
2015-12-09 16:36 ` [Intel-wired-lan] " Alexander Duyck
2015-12-09 16:36 ` Alexander Duyck
2015-12-09 16:36 ` [Qemu-devel] " Alexander Duyck
2015-12-09 10:37 ` Michael S. Tsirkin
2015-12-09 10:37 ` [Intel-wired-lan] " Michael S. Tsirkin
2015-12-09 10:37 ` Michael S. Tsirkin
2015-12-09 10:37 ` Michael S. Tsirkin
2015-12-09 10:37 ` [Qemu-devel] " Michael S. Tsirkin
2015-12-09 11:19 ` Lan, Tianyu
2015-12-09 11:19 ` [Intel-wired-lan] " Lan, Tianyu
2015-12-09 11:19 ` Lan, Tianyu
2015-12-09 11:19 ` Lan, Tianyu
2015-12-09 11:19 ` [Qemu-devel] " Lan, Tianyu
2015-12-09 11:28 ` Michael S. Tsirkin
2015-12-09 11:28 ` [Intel-wired-lan] " Michael S. Tsirkin
2015-12-09 11:28 ` Michael S. Tsirkin
2015-12-09 11:28 ` Michael S. Tsirkin
2015-12-09 11:28 ` [Qemu-devel] " Michael S. Tsirkin
2015-12-09 11:41 ` Lan, Tianyu
2015-12-09 11:41 ` [Intel-wired-lan] " Lan, Tianyu
2015-12-09 11:41 ` Lan, Tianyu
2015-12-09 11:41 ` Lan, Tianyu
2015-12-09 11:41 ` [Qemu-devel] " Lan, Tianyu
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