Ubuntu 16.10 KVM SRIOV: if enable sriov while ping flood is running ping will stop working

------- Comment From <email address hidden> 2017-01-13 11:51 EDT-------
Thanks Gavin for working in this set of patches.

Here are the upstream commits for this issue:
From f40ec3c748c6912f6266c56a7f7992de61b255ed Mon Sep 17 00:00:00 2001
From: Gavin Shan <email address hidden>
Date: Wed, 26 Oct 2016 12:15:35 +1100
Subject: PCI: Do any VF BAR updates before enabling the BARs

From 63880b230a4af502c56dde3d4588634c70c66006 Mon Sep 17 00:00:00 2001
From: Bjorn Helgaas <email address hidden>
Date: Mon, 28 Nov 2016 11:19:27 -0600
Subject: PCI: Ignore BAR updates on virtual functions

From 45d004f4afefdd8d79916ee6d97a9ecd94bb1ffe Mon Sep 17 00:00:00 2001
From: Bjorn Helgaas <email address hidden>
Date: Tue, 29 Nov 2016 08:14:47 -0600
Subject: PCI: Update BARs using property bits appropriate for type

From 6ffa2489c51da77564a0881a73765ea2169f955d Mon Sep 17 00:00:00 2001
From: Bjorn Helgaas <email address hidden>
Date: Mon, 28 Nov 2016 09:15:52 -0600
Subject: PCI: Separate VF BAR updates from standard BAR updates

From 546ba9f8f22f71b0202b6ba8967be5cc6dae4e21 Mon Sep 17 00:00:00 2001
From: Bjorn Helgaas <email address hidden>
Date: Mon, 28 Nov 2016 16:43:06 -0600
Subject: PCI: Don't update VF BARs while VF memory space is enabled

From 286c2378aaccc7343ebf17ec6cd86567659caf70 Mon Sep 17 00:00:00 2001
From: Bjorn Helgaas <email address hidden>
Date: Mon, 28 Nov 2016 16:51:19 -0600
Subject: PCI: Remove pci_resource_bar() and pci_iov_resource_bar()

From 7a6d312b50e63f598f5b5914c4fd21878ac2b595 Mon Sep 17 00:00:00 2001
From: Bjorn Helgaas <email address hidden>
Date: Mon, 28 Nov 2016 17:21:02 -0600
Subject: PCI: Decouple IORESOURCE_ROM_ENABLE and PCI_ROM_ADDRESS_ENABLE

From 0b457dde3cf8b7c76a60f8e960f21bbd4abdc416 Mon Sep 17 00:00:00 2001
From: Bjorn Helgaas <email address hidden>
Date: Mon, 28 Nov 2016 16:17:41 -0600
Subject: PCI: Add comments about ROM BAR updating

https://lists.ubuntu.com/archives/kernel-team/2017-January/081830.html

https://lists.ubuntu.com/archives/kernel-team/2017-January/081840.html

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-xenial' to 'verification-done-xenial'. If the problem still exists, change the tag 'verification-needed-xenial' to 'verification-failed-xenial'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-yakkety' to 'verification-done-yakkety'. If the problem still exists, change the tag 'verification-needed-yakkety' to 'verification-failed-yakkety'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

------- Comment From <email address hidden> 2017-02-10 12:43 EDT-------
I tried kernel 4.8.0-38-generic #41-Ubuntu SMP Wed Feb 8 14:26:14 UTC 2017 ppc64le ppc64le ppc64le GNU/Linux
and I can not recreate the issue.

This bug was fixed in the package linux - 4.4.0-63.84

---------------
linux (4.4.0-63.84) xenial; urgency=low

  [ Thadeu Lima de Souza Cascardo ]

  * Release Tracking Bug
    - LP: #1660704

  * Backport Dirty COW patch to prevent wineserver freeze (LP: #1658270)
    - SAUCE: mm: Respect FOLL_FORCE/FOLL_COW for thp

  * Kdump through NMI SMP and single core not working on Ubuntu16.10
    (LP: #1630924)
    - x86/hyperv: Handle unknown NMIs on one CPU when unknown_nmi_panic
    - SAUCE: hv: don't reset hv_context.tsc_page on crash

  * [regression 4.8.0-14 -> 4.8.0-17] keyboard and touchscreen lost on Acer
    Chromebook R11 (LP: #1630238)
    - [Config] CONFIG_PINCTRL_CHERRYVIEW=y

  * Call trace when testing fstat stressor on ppc64el with virtual keyboard and
    mouse present (LP: #1652132)
    - SAUCE: HID: usbhid: Quirk a AMI virtual mouse and keyboard with ALWAYS_POLL

  * VLAN SR-IOV regression for IXGBE driver (LP: #1658491)
    - ixgbe: Force VLNCTRL.VFE to be set in all VMDq paths

  * "Out of memory" errors after upgrade to 4.4.0-59 (LP: #1655842)
    - mm, page_alloc: convert alloc_flags to unsigned
    - mm, compaction: change COMPACT_ constants into enum
    - mm, compaction: distinguish COMPACT_DEFERRED from COMPACT_SKIPPED
    - mm, compaction: simplify __alloc_pages_direct_compact feedback interface
    - mm, compaction: distinguish between full and partial COMPACT_COMPLETE
    - mm, compaction: abstract compaction feedback to helpers
    - mm, oom: protect !costly allocations some more
    - mm: consider compaction feedback also for costly allocation
    - mm, oom, compaction: prevent from should_compact_retry looping for ever for
      costly orders
    - mm, oom: protect !costly allocations some more for !CONFIG_COMPACTION
    - mm, oom: prevent premature OOM killer invocation for high order request

  * Backport 3 patches to fix bugs with AIX clients using IBMVSCSI Target Driver
    (LP: #1657194)
    - SAUCE: ibmvscsis: Fix max transfer length
    - SAUCE: ibmvscsis: fix sleeping in interrupt context
    - SAUCE: ibmvscsis: Fix srp_transfer_data fail return code

  * NVMe: adapter is missing after abnormal shutdown followed by quick reboot,
    quirk needed (LP: #1656913)
    - nvme: apply DELAY_BEFORE_CHK_RDY quirk at probe time too

  * Ubuntu 16.10 KVM SRIOV: if enable sriov while ping flood is running ping
    will stop working (LP: #1625318)
    - PCI: Do any VF BAR updates before enabling the BARs
    - PCI: Ignore BAR updates on virtual functions
    - PCI: Update BARs using property bits appropriate for type
    - PCI: Separate VF BAR updates from standard BAR updates
    - PCI: Don't update VF BARs while VF memory space is enabled
    - PCI: Remove pci_resource_bar() and pci_iov_resource_bar()
    - PCI: Decouple IORESOURCE_ROM_ENABLE and PCI_ROM_ADDRESS_ENABLE
    - PCI: Add comments about ROM BAR updating

  * Linux rtc self test fails in a VM under xenial (LP: #1649718)
    - kvm: x86: Convert ioapic->rtc_status.dest_map to a struct
    - kvm: x86: Track irq vectors in ioapic->rtc_status.dest_map
    - kvm: x86: Check dest_map->vector to match eoi signals for rtc

  * Xenial update to v4.4.44 stable releas...

This bug was fixed in the package linux - 4.8.0-38.41

---------------
linux (4.8.0-38.41) yakkety; urgency=low

  [ Thadeu Lima de Souza Cascardo ]

  * Release Tracking Bug
    - LP: #1661232

  * Backport Dirty COW patch to prevent wineserver freeze (LP: #1658270)
    - SAUCE: mm: Respect FOLL_FORCE/FOLL_COW for thp

  * Kdump through NMI SMP and single core not working on Ubuntu16.10
    (LP: #1630924)
    - x86/hyperv: Handle unknown NMIs on one CPU when unknown_nmi_panic
    - SAUCE: hv: don't reset hv_context.tsc_page on crash

  * Call trace when testing fstat stressor on ppc64el with virtual keyboard and
    mouse present (LP: #1652132)
    - HID: usbhid: Quirk a AMI virtual mouse and keyboard with ALWAYS_POLL

  * regression in linux-libc-dev in yakkety: C++ style comments are not allowed
    in ISO C90 (LP: #1659654)
    - generic syscalls: kill cruft from removed pkey syscalls

  * [16.04.2] POWER9 patches on top of 4.8 (LP: #1650263)
    - powerpc/book3s: Add a cpu table entry for different POWER9 revs
    - powerpc/mm/radix: Use different RTS encoding for different POWER9 revs
    - powerpc/mm/radix: Use different pte update sequence for different POWER9
      revs
    - powerpc/mm: Update the HID bit when switching from radix to hash
    - powerpc/64/kexec: NULL check "clear_all" in kexec_sequence
    - powerpc/64/kexec: Fix MMU cleanup on radix
    - powerpc/mm: Add radix flush all with IS=3
    - powerpc/64/kexec: Copy image with MMU off when possible
    - powerpc/64: Simplify adaptation to new ISA v3.00 HPTE format
    - powerpc/mm/radix: Invalidate ERAT on tlbiel for POWER9 DD1
    - powerpc/mm: Fix missing update of HID register on secondary CPUs
    - powerpc/64: Add some more SPRs and SPR bits for POWER9
    - powerpc/64: Provide functions for accessing POWER9 partition table
    - powerpc/powernv: Define real-mode versions of OPAL XICS accessors
    - powerpc/64: Define new ISA v3.00 logical PVR value and PCR register value
    - mm: update mmu_gather range correctly
    - mm/hugetlb: add tlb_remove_hugetlb_entry for handling hugetlb pages
    - mm: add tlb_remove_check_page_size_change to track page size change
    - powerpc: Revert Load Monitor Register Support
    - powerpc/mm: Correct process and partition table max size
    - powernv: Clear SPRN_PSSCR when a POWER9 CPU comes online
    - powerpc/mm/radix: Setup AMOR in HV mode to allow key 0
    - powerpc/mm: Detect instruction fetch denied and report
    - powerpc/mm/radix: Prevent kernel execution of user space
    - powerpc/mm: Rename hugetlb-radix.h to hugetlb.h
    - powerpc/mm/hugetlb: Handle hugepage size supported by hash config
    - powerpc/mm: Introduce _PAGE_LARGE software pte bits
    - powerpc/mm: Add radix__tlb_flush_pte_p9_dd1()
    - powerpc/mm: update radix__ptep_set_access_flag to not do full mm tlb flush
    - powerpc/mm: update radix__pte_update to not do full mm tlb flush
    - powerpc/mm: Batch tlb flush when invalidating pte entries
    - powerpc/sparse: Make a bunch of things static
    - powerpc/perf: factor out the event format field
    - powerpc/perf: update attribute_group data structure
    - powerpc/perf: power9 raw event format en...