From: "Lan, Tianyu" <tianyu.lan@intel.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: bhelgaas@google.com, carolyn.wyborny@intel.com,
donald.c.skidmore@intel.com, eddie.dong@intel.com,
nrupal.jani@intel.com, yang.z.zhang@intel.com, agraf@suse.de,
kvm@vger.kernel.org, pbonzini@redhat.com, qemu-devel@nongnu.org,
emil.s.tantilov@intel.com, intel-wired-lan@lists.osuosl.org,
jeffrey.t.kirsher@intel.com, jesse.brandeburg@intel.com,
john.ronciak@intel.com, linux-kernel@vger.kernel.org,
linux-pci@vger.kernel.org, matthew.vick@intel.com,
mitch.a.williams@intel.com, netdev@vger.kernel.org,
shannon.nelson@intel.com
Subject: Re: [RFC Patch 08/12] IXGBEVF: Rework code of finding the end transmit desc of package
Date: Sun, 25 Oct 2015 00:08:08 +0800 [thread overview]
Message-ID: <562BACE8.8070507@intel.com> (raw)
In-Reply-To: <20151022155650-mutt-send-email-mst@redhat.com>
On 10/22/2015 8:58 PM, Michael S. Tsirkin wrote:
> Do you really need to play the shifting games?
> Can't you just reset everything and re-initialize the rings?
> It's slower but way less intrusive.
> Also removes the need to track writes into rings.
Shift ring is to avoid losing those packets in the ring.
This may cause some race condition and so I introduced a
lock to prevent such cases in the latter patch.
Yes, reset everything after migration can make thing easy.
But just like you said it would affect performance and loss
more packets. I can do a test later to get data about these
two way.
next prev parent reply other threads:[~2015-10-24 16:08 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-21 16:37 [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC Lan Tianyu
2015-10-21 16:37 ` [RFC Patch 01/12] PCI: Add virtfn_index for struct pci_device Lan Tianyu
2015-10-21 18:07 ` Alexander Duyck
2015-10-24 14:46 ` Lan, Tianyu
2015-10-21 16:37 ` [RFC Patch 02/12] IXGBE: Add new mail box event to restore VF status in the PF driver Lan Tianyu
2015-10-21 20:34 ` Alexander Duyck
2015-10-21 16:37 ` [RFC Patch 03/12] IXGBE: Add sysfs interface for Qemu to migrate " Lan Tianyu
2015-10-21 20:45 ` Alexander Duyck
2015-10-25 7:21 ` Lan, Tianyu
2015-10-21 16:37 ` [RFC Patch 04/12] IXGBE: Add ixgbe_ping_vf() to notify a specified VF via mailbox msg Lan Tianyu
2015-10-21 16:37 ` [RFC Patch 05/12] IXGBE: Add new sysfs interface of "notify_vf" Lan Tianyu
2015-10-21 20:52 ` Alexander Duyck
2015-10-22 12:51 ` Michael S. Tsirkin
2015-10-24 15:43 ` Lan, Tianyu
2015-10-25 6:03 ` Alexander Duyck
2015-10-25 6:45 ` Lan, Tianyu
2015-10-21 16:37 ` [RFC Patch 06/12] IXGBEVF: Add self emulation layer Lan Tianyu
2015-10-21 20:58 ` Alexander Duyck
2015-10-22 12:50 ` [Qemu-devel] " Michael S. Tsirkin
2015-10-22 15:50 ` Alexander Duyck
2015-10-21 16:37 ` [RFC Patch 07/12] IXGBEVF: Add new mail box event for migration Lan Tianyu
2015-10-21 16:37 ` [RFC Patch 08/12] IXGBEVF: Rework code of finding the end transmit desc of package Lan Tianyu
2015-10-21 21:14 ` Alexander Duyck
2015-10-24 16:12 ` Lan, Tianyu
2015-10-22 12:58 ` Michael S. Tsirkin
2015-10-24 16:08 ` Lan, Tianyu [this message]
2015-10-21 16:37 ` [RFC Patch 09/12] IXGBEVF: Add live migration support for VF driver Lan Tianyu
2015-10-21 21:48 ` Alexander Duyck
2015-10-22 12:46 ` Michael S. Tsirkin
2015-10-21 16:37 ` [RFC Patch 10/12] IXGBEVF: Add lock to protect tx/rx ring operation Lan Tianyu
2015-10-21 21:55 ` Alexander Duyck
2015-10-22 12:40 ` Michael S. Tsirkin
2015-10-21 16:37 ` [RFC Patch 11/12] IXGBEVF: Migrate VF statistic data Lan Tianyu
2015-10-22 12:36 ` Michael S. Tsirkin
2015-10-21 16:37 ` [RFC Patch 12/12] IXGBEVF: Track dma dirty pages Lan Tianyu
2015-10-22 12:30 ` Michael S. Tsirkin
2015-10-21 18:45 ` [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC Or Gerlitz
2015-10-21 19:20 ` Alex Williamson
2015-10-21 23:26 ` Alexander Duyck
2015-10-22 12:32 ` [Qemu-devel] " Michael S. Tsirkin
2015-10-22 13:01 ` Alex Williamson
2015-10-22 13:06 ` Michael S. Tsirkin
2015-10-22 15:58 ` Or Gerlitz
2015-10-22 16:17 ` Alex Williamson
2015-10-22 12:55 ` [Qemu-devel] " Michael S. Tsirkin
2015-10-23 18:36 ` Alexander Duyck
2015-10-23 19:05 ` Alex Williamson
2015-10-23 20:01 ` Alexander Duyck
2015-10-26 5:36 ` Lan Tianyu
2015-10-26 15:03 ` Alexander Duyck
2015-10-29 6:12 ` Lan Tianyu
2015-10-29 6:58 ` Alexander Duyck
2015-10-29 8:33 ` Lan Tianyu
2015-10-29 16:17 ` Alexander Duyck
2015-10-30 2:41 ` Lan Tianyu
2015-10-30 18:04 ` Alexander Duyck
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