Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1255675

Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC

Show all headers | View raw

On 2015年10月24日 02:36, Alexander Duyck wrote:
> I was thinking about it and I am pretty sure the dummy write approach is
> problematic at best.  Specifically the issue is that while you are
> performing a dummy write you risk pulling in descriptors for data that
> hasn't been dummy written to yet.  So when you resume and restore your
> descriptors you will have once that may contain Rx descriptors
> indicating they contain data when after the migration they don't.

How about changing sequence? dummy writing Rx packet data fist and then
its desc. This can ensure that RX data is migrated before its desc and
prevent such case.

-- 
Best regards
Tianyu Lan
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC Lan Tianyu <tianyu.lan@intel.com> - 2015-10-21 19:00 +0200
  [RFC Patch 10/12] IXGBEVF: Add lock to protect tx/rx ring operation Lan Tianyu <tianyu.lan@intel.com> - 2015-10-21 19:00 +0200
    Re: [RFC Patch 10/12] IXGBEVF: Add lock to protect tx/rx ring  operation Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-22 00:00 +0200
    Re: [RFC Patch 10/12] IXGBEVF: Add lock to protect tx/rx ring  operation "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-22 14:50 +0200
  [RFC Patch 08/12] IXGBEVF: Rework code of finding the end transmit desc of package Lan Tianyu <tianyu.lan@intel.com> - 2015-10-21 19:00 +0200
    Re: [RFC Patch 08/12] IXGBEVF: Rework code of finding the end  transmit desc of package Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-21 23:20 +0200
      Re: [RFC Patch 08/12] IXGBEVF: Rework code of finding the end transmit  desc of package "Lan, Tianyu" <tianyu.lan@intel.com> - 2015-10-24 18:20 +0200
    Re: [RFC Patch 08/12] IXGBEVF: Rework code of finding the end  transmit desc of package "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-22 15:00 +0200
      Re: [RFC Patch 08/12] IXGBEVF: Rework code of finding the end transmit  desc of package "Lan, Tianyu" <tianyu.lan@intel.com> - 2015-10-24 18:10 +0200
  [RFC Patch 09/12] IXGBEVF: Add live migration support for VF driver Lan Tianyu <tianyu.lan@intel.com> - 2015-10-21 19:00 +0200
    Re: [RFC Patch 09/12] IXGBEVF: Add live migration support for VF  driver Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-21 23:50 +0200
    Re: [RFC Patch 09/12] IXGBEVF: Add live migration support for VF  driver "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-22 14:50 +0200
  Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC Or Gerlitz <gerlitz.or@gmail.com> - 2015-10-21 20:50 +0200
    Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV  NIC Alex Williamson <alex.williamson@redhat.com> - 2015-10-21 21:30 +0200
      Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-22 01:30 +0200
      Re: [Qemu-devel] [RFC Patch 00/12] IXGBE: Add live migration support  for SRIOV NIC "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-22 14:40 +0200
        Re: [Qemu-devel] [RFC Patch 00/12] IXGBE: Add live migration  support for SRIOV NIC Alex Williamson <alex.williamson@redhat.com> - 2015-10-22 15:10 +0200
          Re: [Qemu-devel] [RFC Patch 00/12] IXGBE: Add live migration support  for SRIOV NIC "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-22 15:10 +0200
      Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC Or Gerlitz <gerlitz.or@gmail.com> - 2015-10-22 18:00 +0200
        Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV  NIC Alex Williamson <alex.williamson@redhat.com> - 2015-10-22 18:20 +0200
  Re: [Qemu-devel] [RFC Patch 00/12] IXGBE: Add live migration support  for SRIOV NIC "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-22 15:00 +0200
  Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-23 20:40 +0200
    Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV  NIC Alex Williamson <alex.williamson@redhat.com> - 2015-10-23 21:10 +0200
      Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-23 22:10 +0200
    Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV  NIC Lan Tianyu <tianyu.lan@intel.com> - 2015-10-26 06:50 +0100
      Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-26 16:10 +0100
        Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV  NIC Lan Tianyu <tianyu.lan@intel.com> - 2015-10-29 07:30 +0100
          Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-29 08:00 +0100
            Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV  NIC Lan Tianyu <tianyu.lan@intel.com> - 2015-10-29 09:50 +0100
              Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-29 17:20 +0100
                Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV  NIC Lan Tianyu <tianyu.lan@intel.com> - 2015-10-30 04:00 +0100
                Re: [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC Alexander Duyck <alexander.duyck@gmail.com> - 2015-10-30 19:10 +0100

csiph-web