[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[Launchpad Bug Tracker]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
   Status: Incomplete => Expired

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Expired

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

  Here's the LSHW output from the system:
  http://pastebin.ubuntu.com/23875929/

To manage notifications about this bug go to:
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Re: [Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[Jason Hobbs]

Doing some more testing it looks like the systems without the firmware
udpate are not stable.  I can sometimes, but not always, get them to boot
using either 4.4.0-59-generic #80  or  4.4.0-62-generic #83, but once
they're up, they don't last long.  The longest I've seen is about 40
minutes before getting "sd 0:0:2:0: rejecting I/O to offline device" errors
and /dev/sda going offline.  I can get it to go offline quicker - almost
immediately - by doing "cat /dev/urandom > /dev/sdb".

The two systems with the firmware updates both reliably boot up and stay up
using either 4.4.0-59-generic #80 or 4.4.0-62-generic #83, and haven't gone
offline yet from the "cat /dev/urandom > /dev/sdb" test. I will leave them
running over night.


On Mon, Jan 30, 2017 at 6:51 PM, Jason Hobbs 
wrote:

> So, I appear to have spoken too soon on exactly what fixes this.
>
> We have two systems being tested with 4.4.0-62-generic #83 - one with the
> firmware update and one without.
>
> The one with the firmware updates has been up for over 6 hours now without
> any issues.
>
> The one without firmware updates has been up for 40 minutes and is getting
> I/O errors now.
>
> I'm also seeing a system with 4.4.0-59-generic #80 and no firmware updates
> boot up with iommu enabled, I will see how long it stays up..
>
> I'll also test with 4.4.0-59-generic #80 and the firmware updates.
>
> On Mon, Jan 30, 2017 at 6:13 PM, Jason Hobbs 
> wrote:
>
>> We found testing with the latest Xenial kernel (4.4.0.62.65) from
>> https://launchpad.net/~canonical-kernel-
>> team/+archive/ubuntu/ppa/+build/11278866 fixes this issue - no firmware
>> updates required.  We did also test with just the latest firmware
>> updates, and that did not fix the issue. Latest firmware + 4.4.0.62.65
>> also works.
>>
>> --
>> You received this bug notification because you are subscribed to the bug
>> report.
>> https://bugs.launchpad.net/bugs/1641593
>>
>> Title:
>>   unable to enable iommu on HPE Proliant Gen9 server
>>
>> Status in linux package in Ubuntu:
>>   Incomplete
>>
>> Bug description:
>>   I'm using MAAS to enable the following kernel flags on install/boot:
>>
>> iommu=pt intel_iommu=on
>>
>>   in order to be able to passthrough SR-IOV VF functions to KVM guess;
>>   however when these options are enabled, the servers fail to install
>>   (see attached screenshot).
>>
>>   The install eventually fails - it looks like the writes back to one of
>>   the disks starts to fail for some reason.
>>
>>   Servers are targeted with Xenial and the release 4.4 kernel (no HWE).
>>
>>   Here's the LSHW output from the system:
>>   http://pastebin.ubuntu.com/23875929/
>>
>> To manage notifications about this bug go to:
>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593
>> /+subscriptions
>>
>
>

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

  Here's the LSHW output from the system:
  http://pastebin.ubuntu.com/23875929/

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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Re: [Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[Jason Hobbs]

So, I appear to have spoken too soon on exactly what fixes this.

We have two systems being tested with 4.4.0-62-generic #83 - one with the
firmware update and one without.

The one with the firmware updates has been up for over 6 hours now without
any issues.

The one without firmware updates has been up for 40 minutes and is getting
I/O errors now.

I'm also seeing a system with 4.4.0-59-generic #80 and no firmware updates
boot up with iommu enabled, I will see how long it stays up..

I'll also test with 4.4.0-59-generic #80 and the firmware updates.

On Mon, Jan 30, 2017 at 6:13 PM, Jason Hobbs 
wrote:

> We found testing with the latest Xenial kernel (4.4.0.62.65) from
> https://launchpad.net/~canonical-kernel-
> team/+archive/ubuntu/ppa/+build/11278866 fixes this issue - no firmware
> updates required.  We did also test with just the latest firmware
> updates, and that did not fix the issue. Latest firmware + 4.4.0.62.65
> also works.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1641593
>
> Title:
>   unable to enable iommu on HPE Proliant Gen9 server
>
> Status in linux package in Ubuntu:
>   Incomplete
>
> Bug description:
>   I'm using MAAS to enable the following kernel flags on install/boot:
>
> iommu=pt intel_iommu=on
>
>   in order to be able to passthrough SR-IOV VF functions to KVM guess;
>   however when these options are enabled, the servers fail to install
>   (see attached screenshot).
>
>   The install eventually fails - it looks like the writes back to one of
>   the disks starts to fail for some reason.
>
>   Servers are targeted with Xenial and the release 4.4 kernel (no HWE).
>
>   Here's the LSHW output from the system:
>   http://pastebin.ubuntu.com/23875929/
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/
> 1641593/+subscriptions
>

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

  Here's the LSHW output from the system:
  http://pastebin.ubuntu.com/23875929/

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[Jason Hobbs]

We found testing with the latest Xenial kernel (4.4.0.62.65) from
https://launchpad.net/~canonical-kernel-
team/+archive/ubuntu/ppa/+build/11278866 fixes this issue - no firmware
updates required.  We did also test with just the latest firmware
updates, and that did not fix the issue. Latest firmware + 4.4.0.62.65
also works.

-- 
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https://bugs.launchpad.net/bugs/1641593

Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

  Here's the LSHW output from the system:
  http://pastebin.ubuntu.com/23875929/

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[Jason Hobbs]

** Description changed:

  I'm using MAAS to enable the following kernel flags on install/boot:
  
    iommu=pt intel_iommu=on
  
  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install (see
  attached screenshot).
  
  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.
  
  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).
+ 
+ Here's the LSHW output from the system:
+ http://pastebin.ubuntu.com/23875929/

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

  Here's the LSHW output from the system:
  http://pastebin.ubuntu.com/23875929/

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[Joseph Salisbury]

** Changed in: linux (Ubuntu)
   Status: Confirmed => Incomplete

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[Joseph Salisbury]

** Tags removed: kernel-key
** Tags added: kernel-da-key

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[Joseph Salisbury]

Thanks for the update.  That would make it difficult to know if this is
a regression, or if this bug always existed.

It might be worth while testing the latest Xenial kernel in -proposed:
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/11278866

The 4.9-rc7 kernel is now also available, and might be worth testing.  It is 
available from:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9-rc7/

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[James Page]

OK so tripped on another issue trying with trusty - the servers I'm
using have NVMe SSD's for caching, and it looks like trusty blkid is
unable to read meta from from nvme devices.

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[James Page]

I'll try with trusty

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[Joseph Salisbury]

Is there a prior kernel version that does boot properly?  If there is,
we can perform a kernel bisect to find the commit that introduced this
bug.

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[James Page]

Also bug 1550481

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https://bugs.launchpad.net/bugs/1641593

Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[Joseph Salisbury]

Is there a prior kernel version that does boot properly, like Trusty or
Precise, etc?

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[James Page]

(I also tried a firmware upgrade for the storage controller to the
latest version - no luck).

** Tags added: kernel-bug-exists-upstream-4.9-rc5

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[James Page]

OK tried with:

http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9-rc5/

still see the same issue with intel_iommu=on; booted fine prior to
enabling.

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[James Page]

Hi Joseph

The problem happens both during install, and during a regular boot (for
example if I enable iommu post install and then reboot).

Happy to try new kernel versions for testing.

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[Joseph Salisbury]

Is it possible to install the system, then boot with different kernel
versions to see if it only happens at install time, or if it also
happens after install on regular boot.

We could bisect and also test newer kernels to see if there is a fix
already if we can boot different kernels.

** Changed in: linux (Ubuntu)
   Importance: Undecided => High

** Tags added: kernel-key

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[ryeterrell]

** Tags added: v-pil vpil

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https://bugs.launchpad.net/bugs/1641593

Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[James Page]

Unable todo apport-collect as machine won't actually boot to usable.

** Changed in: linux (Ubuntu)
   Status: Incomplete => Confirmed

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https://bugs.launchpad.net/bugs/1641593

Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[James Page]

** Description changed:

  I'm using MAAS to enable the following kernel flags on install/boot:
  
-   iommu=pt intel_iommu=on
+   iommu=pt intel_iommu=on
  
  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install (see
  attached screenshot).
  
  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.
+ 
+ Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[James Page]

potentially related bug 1590072

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https://bugs.launchpad.net/bugs/1641593

Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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[Kernel-packages] [Bug 1641593] Re: unable to enable iommu on HPE Proliant Gen9 server

[James Page]

Device 03:00.0 is the SAS smart array controller in the server (grabbed
from a machine deployed without iommu enable):

03:00.0 Serial Attached SCSI controller: Hewlett-Packard Company Smart Array 
Gen9 Controllers (rev 01)
DeviceName: Embedded RAID 1
Subsystem: Hewlett-Packard Company P440ar
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ 
Stepping- SERR+ FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- 
Kernel driver in use: hpsa
Kernel modules: hpsa

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Title:
  unable to enable iommu on HPE Proliant Gen9 server

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I'm using MAAS to enable the following kernel flags on install/boot:

    iommu=pt intel_iommu=on

  in order to be able to passthrough SR-IOV VF functions to KVM guess;
  however when these options are enabled, the servers fail to install
  (see attached screenshot).

  The install eventually fails - it looks like the writes back to one of
  the disks starts to fail for some reason.

  Servers are targeted with Xenial and the release 4.4 kernel (no HWE).

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641593/+subscriptions

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