group.of.nepali.translators team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

SRU requests submitted:

Bionic:
https://lists.ubuntu.com/archives/kernel-team/2018-December/097360.html

Cosmic:
https://lists.ubuntu.com/archives/kernel-team/2018-December/097361.html

linux-azure:
https://lists.ubuntu.com/archives/kernel-team/2018-December/097359.html


** No longer affects: linux (Ubuntu Xenial)

** Changed in: linux (Ubuntu Bionic)
       Status: Triaged => In Progress

** Changed in: linux-azure (Ubuntu)
       Status: Triaged => In Progress

** Description changed:

  == SRU Justification ==
  
  Microsoft has identified a multiple-NIC-deadlock issue on Hyper-V VMs.  This bug is fixed by the following commit, which is in mainline as of v4.20-rc6:
  37c2578c0c40 ("Drivers: hv: vmbus: Offload the handling of channels to two workqueues")
  
  A second commit is also needed to prevent a deadlock with single NIC VMs.  This commit is in mainline as of 4.19-rc3:
  e04e7a7bbd4b ("hv_netvsc: Fix a deadlock by getting rtnl lock earlier in netvsc_probe()")
  
  The Disco development release has been rebased to upstream 4.19,  and it
  already has commit eceb0596548.  Disco only needs 37c2578c0c40.
  
  Cosmic does not require any dependent commits, just the two
  above(37c2578c0c40, e04e7a7bbd4b).
  
  linux-azure and Bionic(4.15+ kernels) require the following five dependent commits:
  4.18-rc1 - 7bf7bb37f16a ("hv_netvsc: fix network namespace issues with VF support")
  4.18-rc4 - 3ffe64f1a641 ("hv_netvsc: split sub-channel setup into async and sync")
  4.19-rc1 - 50229128727f ("Drivers: hv: vmbus: Fix the offer_in_progress in vmbus_process_offer()")
  4.19-rc3 - e04e7a7bbd4b ("hv_netvsc: Fix a deadlock by getting rtnl lock earlier in netvsc_probe()")
  4.19-rc4 - 6712cc9c2211 ("vmbus: don't return values for uninitalized channels")
  
- Xenial(4.14 and older kernels) require the following five dependent commits:
- 4.15-rc1 - c2e5df616e1a ("vmbus: add per-channel sysfs info")
- 4.15-rc6 - 869b5567e12f ("vmbus: unregister device_obj->channels_kset")
- 4.19-rc1 - 50229128727f ("Drivers: hv: vmbus: Fix the offer_in_progress in vmbus_process_offer()")
- 4.19-rc4 - 6712cc9c2211 ("vmbus: don't return values for uninitalized channels")
- 4.20-rc5 - eceb05965489 ("Drivers: hv: vmbus: check the creation_status in vmbus_establish_gpadl()")
  
  == Fixes ==
  ("Dependent commits mentioned above, based on Ubuntu release")
  
  e04e7a7bbd4b ("hv_netvsc: Fix a deadlock by getting rtnl lock earlier in
  netvsc_probe()")
  
  37c2578c0c40 ("Drivers: hv: vmbus: Offload the handling of channels to
  two workqueues")
  
  == Regression Potential ==
  Low.  Limited to hyperv.
  
  == Test Case ==

-- 
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Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1807757

Title:
  Drivers: hv: vmbus: Offload the handling of channels to two workqueues

Status in linux package in Ubuntu:
  Fix Committed
Status in linux-azure package in Ubuntu:
  In Progress
Status in linux source package in Bionic:
  In Progress
Status in linux source package in Cosmic:
  In Progress
Status in linux source package in Disco:
  Fix Committed

Bug description:
  == SRU Justification ==

  Microsoft has identified a multiple-NIC-deadlock issue on Hyper-V VMs.  This bug is fixed by the following commit, which is in mainline as of v4.20-rc6:
  37c2578c0c40 ("Drivers: hv: vmbus: Offload the handling of channels to two workqueues")

  A second commit is also needed to prevent a deadlock with single NIC VMs.  This commit is in mainline as of 4.19-rc3:
  e04e7a7bbd4b ("hv_netvsc: Fix a deadlock by getting rtnl lock earlier in netvsc_probe()")

  The Disco development release has been rebased to upstream 4.19,  and
  it already has commit eceb0596548.  Disco only needs 37c2578c0c40.

  Cosmic does not require any dependent commits, just the two
  above(37c2578c0c40, e04e7a7bbd4b).

  linux-azure and Bionic(4.15+ kernels) require the following five dependent commits:
  4.18-rc1 - 7bf7bb37f16a ("hv_netvsc: fix network namespace issues with VF support")
  4.18-rc4 - 3ffe64f1a641 ("hv_netvsc: split sub-channel setup into async and sync")
  4.19-rc1 - 50229128727f ("Drivers: hv: vmbus: Fix the offer_in_progress in vmbus_process_offer()")
  4.19-rc3 - e04e7a7bbd4b ("hv_netvsc: Fix a deadlock by getting rtnl lock earlier in netvsc_probe()")
  4.19-rc4 - 6712cc9c2211 ("vmbus: don't return values for uninitalized channels")


  == Fixes ==
  ("Dependent commits mentioned above, based on Ubuntu release")

  e04e7a7bbd4b ("hv_netvsc: Fix a deadlock by getting rtnl lock earlier
  in netvsc_probe()")

  37c2578c0c40 ("Drivers: hv: vmbus: Offload the handling of channels to
  two workqueues")

  == Regression Potential ==
  Low.  Limited to hyperv.

  == Test Case ==

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