[Kernel-packages] [Bug 1839673] Re: [linux-azure] Important InfiniBand patches for Ubuntu 18.04

2019-08-14 Thread Long Li 
I suggest we can just keep 142 as is. The extra module size on disk is
not that bad at 140k.

The original design was to deal with future ND version updates.

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Title:
  [linux-azure] Important InfiniBand patches for Ubuntu 18.04

Status in linux-azure package in Ubuntu:
  New
Status in linux-azure source package in Disco:
  In Progress

Bug description:
  The following two patches are critical for unblocking kernel sign-off
  for the 5.0 kernel in Ubuntu 18.04:

  ("Don't wait in hvnd_query_gid after interface is already bound to ND")
  ("Expose extended attributes for user IB verbs QUERY_DEVICE, CREATE_CQ and 
CREATE_QP")

  The patches have not landed in linux-next yet, but are needed to
  unblock 18.04 IB.  The patches have been attached to this bug report.
  Please consider including these patches as SAUCE until they land in
  mainline.

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[Kernel-packages] [Bug 1839673] Re: [linux-azure] Important InfiniBand patches for Ubuntu 18.04

2019-08-14 Thread Long Li 
I don't think we have ND 142 cluster in use, they have all been upgraded
to 144. So we only need the patch for ND 144.

This is not needed for 4.15. Ubuntu 16.04 is running older user-mode
drivers that don't cause problems.

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Title:
  [linux-azure] Important InfiniBand patches for Ubuntu 18.04

Status in linux-azure package in Ubuntu:
  New
Status in linux-azure source package in Disco:
  In Progress

Bug description:
  The following two patches are critical for unblocking kernel sign-off
  for the 5.0 kernel in Ubuntu 18.04:

  ("Don't wait in hvnd_query_gid after interface is already bound to ND")
  ("Expose extended attributes for user IB verbs QUERY_DEVICE, CREATE_CQ and 
CREATE_QP")

  The patches have not landed in linux-next yet, but are needed to
  unblock 18.04 IB.  The patches have been attached to this bug report.
  Please consider including these patches as SAUCE until they land in
  mainline.

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[Kernel-packages] [Bug 1701744] Re: Add infiniband support for Azure HPC

2017-06-30 Thread Long Li 
** Patch added: "Infiniband driver for kernel 4.11"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1701744/+attachment/4906980/+files/0001-Add-infiniband-driver-for-Azure-HPC.patch

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Title:
  [Hyper-V] Add infiniband support for Azure HPC

Status in linux package in Ubuntu:
  New

Bug description:
  This is the infiniband driver for Azure HPC.

  Windows Azure agent will provision an image for running infiniband
  RDMA via DAPL when "OS.EnableRDMA=y" is defined in waagent.conf.

  Note: Ubuntu image needs to load rdma_ucm on boot to expose the RDMA
  CM interface to user-mode library.

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[Kernel-packages] [Bug 1701744] Re: Add infiniband support for Azure HPC

2017-06-30 Thread Long Li 
** Patch added: "Infiniband driver build configuration for kernel 4.11"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1701744/+attachment/4906981/+files/0002-Add-driver-build-configuration-to-infiniband.patch

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Title:
  [Hyper-V] Add infiniband support for Azure HPC

Status in linux package in Ubuntu:
  New

Bug description:
  This is the infiniband driver for Azure HPC.

  Windows Azure agent will provision an image for running infiniband
  RDMA via DAPL when "OS.EnableRDMA=y" is defined in waagent.conf.

  Note: Ubuntu image needs to load rdma_ucm on boot to expose the RDMA
  CM interface to user-mode library.

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[Kernel-packages] [Bug 1701744] [NEW] [Hyper-V] Add infiniband support for Azure HPC

2017-06-30 Thread Long Li 
Public bug reported:

This is the infiniband driver for Azure HPC.

Windows Azure agent will provision an image for running infiniband RDMA
via DAPL when "OS.EnableRDMA=y" is defined in waagent.conf.

Note: Ubuntu image needs to load rdma_ucm on boot to expose the RDMA CM
interface to user-mode library.

** Affects: linux (Ubuntu)
 Importance: Undecided
 Status: New

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Title:
  [Hyper-V] Add infiniband support for Azure HPC

Status in linux package in Ubuntu:
  New

Bug description:
  This is the infiniband driver for Azure HPC.

  Windows Azure agent will provision an image for running infiniband
  RDMA via DAPL when "OS.EnableRDMA=y" is defined in waagent.conf.

  Note: Ubuntu image needs to load rdma_ucm on boot to expose the RDMA
  CM interface to user-mode library.

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[Kernel-packages] [Bug 1689627] Re: add version to rdma driver to support new method to bind to ND IP interface

2017-05-09 Thread Long Li 
** Patch added: "Patch for RDMA driver"
   
https://bugs.launchpad.net/ubuntu/+source/walinuxagent/+bug/1689627/+attachment/4874277/+files/0001-vmbus-rdma-add-version-number.patch

** Package changed: walinuxagent (Ubuntu) => linux (Ubuntu)

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Title:
  [Hyper-V] add version to rdma driver to support new method to bind to
  ND IP interface

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  The Linux agent (WALA) checks for module version, then decides how to
  pass the InfiniBand IP address to the RDMA driver. The new RDMA driver
  supports discovery of IP by trying to bind to all possible IP address.
  The driver needs to export the module version to have WALA use the new
  behavior.

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[Kernel-packages] [Bug 1581243] Re: [Hyper-V] PCI Passthrough kernel hang and explicit barriers

2016-05-25 Thread Long Li 
Tested. Everything worked as expected.

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Title:
  [Hyper-V] PCI Passthrough kernel hang and explicit barriers

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Two upstream commits (right now in Bjorn Helgaas's PCI tree, and
  heading to Linus's tree) address potential hangs in PCI passthrough.
  Please consider these upstream items for 16.10 and 16.04 (and HWE
  kernels based on lts-xenial).

  https://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git/commit/?h=pci
  /host-hv=deb22e5c84c884a129d801cf3bfde7411536998d

  PCI: hv: Report resources release after stopping the bus
  Kernel hang is observed when pci-hyperv module is release with device
  drivers still attached.  E.g., when I do 'rmmod pci_hyperv' with BCM5720
  device pass-through-ed (tg3 module) I see the following:

   NMI watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [rmmod:2104]
   ...
   Call Trace:
[] tg3_read_mem+0x87/0x100 [tg3]
[] ? 0xa063f000
[] tg3_poll_fw+0x85/0x150 [tg3]
[] tg3_chip_reset+0x357/0x8c0 [tg3]
[] tg3_halt+0x3b/0x190 [tg3]
[] tg3_stop+0x171/0x230 [tg3]
...
[] tg3_remove_one+0x90/0x140 [tg3]
[] pci_device_remove+0x39/0xc0
[] __device_release_driver+0xa1/0x160
[] device_release_driver+0x23/0x30
[] pci_stop_bus_device+0x8a/0xa0
[] pci_stop_root_bus+0x36/0x60
[] hv_pci_remove+0x238/0x260 [pci_hyperv]

  The problem seems to be that we report local resources release before
  stopping the bus and removing devices from it and device drivers may try to
  perform some operations with these resources on shutdown.  Move resources
  release report after we do pci_stop_root_bus().

  Signed-off-by: Vitaly Kuznetsov 
  Signed-off-by: Bjorn Helgaas 
  Acked-by: Jake Oshins 

  https://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git/commit/?h=pci
  /host-hv=bdd74440d9e887b1fa648eefa17421def5f5243c

  PCI: hv: Add explicit barriers to config space accesspci/host-hv
  I'm trying to pass-through Broadcom BCM5720 NIC (Dell device 1f5b) on a
  Dell R720 server.  Everything works fine when the target VM has only one
  CPU, but SMP guests reboot when the NIC driver accesses PCI config space
  with hv_pcifront_read_config()/hv_pcifront_write_config().  The reboot
  appears to be induced by the hypervisor and no crash is observed.  Windows
  event logs are not helpful at all ('Virtual machine ... has quit
  unexpectedly').  The particular access point is always different and
  putting debug between them (printk/mdelay/...) moves the issue further
  away.  The server model affects the issue as well: on Dell R420 I'm able to
  pass-through BCM5720 NIC to SMP guests without issues.

  While I'm obviously failing to reveal the essence of the issue I was able
  to come up with a (possible) solution: if explicit barriers are added to
  hv_pcifront_read_config()/hv_pcifront_write_config() the issue goes away.
  The essential minimum is rmb() at the end on _hv_pcifront_read_config() and
  wmb() at the end of _hv_pcifront_write_config() but I'm not confident it
  will be sufficient for all hardware.  I suggest the following barriers:

  1) wmb()/mb() between choosing the function and writing to its space.
  2) mb() before releasing the spinlock in both _hv_pcifront_read_config()/
 _hv_pcifront_write_config() to ensure that consecutive reads/writes to
the space won't get re-ordered as drivers may count on that.

  Config space access is not supposed to be performance-critical so these
  explicit barriers should not cause any slowdown.

  [bhelgaas: use Linux "barriers" terminology]
  Signed-off-by: Vitaly Kuznetsov 
  Signed-off-by: Bjorn Helgaas 
  Acked-by: Jake Oshins 

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[Kernel-packages] [Bug 1570124] Re: [Hyper-V] In-flight PCI Passthrough Patches

2016-04-26 Thread Long Li 
We have tested the proposed kernel. It is looking good.

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Title:
  [Hyper-V] In-flight PCI Passthrough Patches

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  Some additional patches for PCI Passthrough have been submitted but
  not accepted upstream that are necessary for accessing multiple GPUs
  on the host. These are expected to get accepted upstream, but since
  there is not much time left in 16.04 I'm submitting them before they
  are accepted upstream.

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