[Starlingx-discuss] Support IBRS cpu model.
Hi All: if install StarlingX in compute-node with cpu type 'Skylake-Server-IBRS' , it cannot use 'passthrough' type with keyword hw:cpu_model in favor to create instance It will prompt "No valid host was found. There are not enough hosts available. computer-0: (VCpuModelFilter) Host VCPU model Skylake-Server-IBRS required Passthrough Code 501" After investigation , Libvirt 4.7.0 supports *IBRS (for example IvyBridge-IBRS, Skylake-Server-IBRS) CPU model , but nova and meta favor does not support *IBRS CPU model yet. I have made patch for nova[0] and glance[1]. Nova[0] will support *-IBRS type vcpu when select passthrough Glance[1] will add metadata to support *-IBRS in hw:cpu_model Please review these PRs. Thanks. BR Austin Sun. [0] https://github.com/starlingx-staging/stx-nova/pull/15 [1] https://github.com/starlingx-staging/stx-glance/pull/4
Austin, Is this bug related to your finding? https://bugs.launchpad.net/starlingx/+bug/1801773 thx. - cindy -----Original Message----- From: Sun, Austin [mailto:austin.sun@intel.com] Sent: Wednesday, November 14, 2018 1:54 PM To: 'starlingx-discuss@lists.starlingx.io' <starlingx-discuss@lists.starlingx.io> Cc: He, Zhiwei <zhiwei.he@intel.com> Subject: [Starlingx-discuss] Support IBRS cpu model. Hi All: if install StarlingX in compute-node with cpu type 'Skylake-Server-IBRS' , it cannot use 'passthrough' type with keyword hw:cpu_model in favor to create instance It will prompt "No valid host was found. There are not enough hosts available. computer-0: (VCpuModelFilter) Host VCPU model Skylake-Server-IBRS required Passthrough Code 501" After investigation , Libvirt 4.7.0 supports *IBRS (for example IvyBridge-IBRS, Skylake-Server-IBRS) CPU model , but nova and meta favor does not support *IBRS CPU model yet. I have made patch for nova[0] and glance[1]. Nova[0] will support *-IBRS type vcpu when select passthrough Glance[1] will add metadata to support *-IBRS in hw:cpu_model Please review these PRs. Thanks. BR Austin Sun. [0] https://github.com/starlingx-staging/stx-nova/pull/15 [1] https://github.com/starlingx-staging/stx-glance/pull/4 _______________________________________________ Starlingx-discuss mailing list Starlingx-discuss@lists.starlingx.io http://lists.starlingx.io/cgi-bin/mailman/listinfo/starlingx-discuss
Hi Cindy: It should be same issue. I was not aware bug#1801773, so I created another bug#1803280. I have just duplicated bug#1803280 to bug#1801773. Thanks. BR Austin Sun. -----Original Message----- From: Xie, Cindy Sent: Wednesday, November 14, 2018 2:03 PM To: Sun, Austin <austin.sun@intel.com>; 'starlingx-discuss@lists.starlingx.io' <starlingx-discuss@lists.starlingx.io> Cc: He, Zhiwei <zhiwei.he@intel.com> Subject: RE: [Starlingx-discuss] Support IBRS cpu model. Austin, Is this bug related to your finding? https://bugs.launchpad.net/starlingx/+bug/1801773 thx. - cindy -----Original Message----- From: Sun, Austin [mailto:austin.sun@intel.com] Sent: Wednesday, November 14, 2018 1:54 PM To: 'starlingx-discuss@lists.starlingx.io' <starlingx-discuss@lists.starlingx.io> Cc: He, Zhiwei <zhiwei.he@intel.com> Subject: [Starlingx-discuss] Support IBRS cpu model. Hi All: if install StarlingX in compute-node with cpu type 'Skylake-Server-IBRS' , it cannot use 'passthrough' type with keyword hw:cpu_model in favor to create instance It will prompt "No valid host was found. There are not enough hosts available. computer-0: (VCpuModelFilter) Host VCPU model Skylake-Server-IBRS required Passthrough Code 501" After investigation , Libvirt 4.7.0 supports *IBRS (for example IvyBridge-IBRS, Skylake-Server-IBRS) CPU model , but nova and meta favor does not support *IBRS CPU model yet. I have made patch for nova[0] and glance[1]. Nova[0] will support *-IBRS type vcpu when select passthrough Glance[1] will add metadata to support *-IBRS in hw:cpu_model Please review these PRs. Thanks. BR Austin Sun. [0] https://github.com/starlingx-staging/stx-nova/pull/15 [1] https://github.com/starlingx-staging/stx-glance/pull/4 _______________________________________________ Starlingx-discuss mailing list Starlingx-discuss@lists.starlingx.io http://lists.starlingx.io/cgi-bin/mailman/listinfo/starlingx-discuss
There's a problem with this patch. The way the VCpuModelFilter is designed, the basic idea is that a host with a CPU model "later" in the list can support guests with all CPU models "earlier" in the list. According to [1] the "spec-ctrl" and "ssbd" CPU features require host CPU microcode (i.e. that the host is detected as the "-IBRS" model) before it can be used for guest CPUs. This means that a "Skylake-Server" host cannot support a "Broadwell-IBRS" guest, which violates the design of the VCpuModelFilter. I think as part of adding the -IBRS models we'll have to also modify the filter itself. Chris [1] https://www.berrange.com/posts/2018/06/29/cpu-model-configuration-for-qemu-k... On 11/13/2018 11:54 PM, Sun, Austin wrote:
Hi All: if install StarlingX in compute-node with cpu type 'Skylake-Server-IBRS' , it cannot use 'passthrough' type with keyword hw:cpu_model in favor to create instance It will prompt "No valid host was found. There are not enough hosts available. computer-0: (VCpuModelFilter) Host VCPU model Skylake-Server-IBRS required Passthrough Code 501" After investigation , Libvirt 4.7.0 supports *IBRS (for example IvyBridge-IBRS, Skylake-Server-IBRS) CPU model , but nova and meta favor does not support *IBRS CPU model yet.
I have made patch for nova[0] and glance[1]. Nova[0] will support *-IBRS type vcpu when select passthrough Glance[1] will add metadata to support *-IBRS in hw:cpu_model
Please review these PRs.
Thanks. BR Austin Sun.
[0] https://github.com/starlingx-staging/stx-nova/pull/15 [1] https://github.com/starlingx-staging/stx-glance/pull/4
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Hi Chris: Thanks your review. I have made new patch [1] based on your suggestion. Could you help review it again ? https://github.com/austinsun/stx-nova/commit/3255facb16b70b138ff12243822b43d... Thanks. BR Austin Sun. -----Original Message----- From: Chris Friesen [mailto:chris.friesen@windriver.com] Sent: Friday, November 16, 2018 11:50 PM To: starlingx-discuss@lists.starlingx.io Subject: Re: [Starlingx-discuss] Support IBRS cpu model. There's a problem with this patch. The way the VCpuModelFilter is designed, the basic idea is that a host with a CPU model "later" in the list can support guests with all CPU models "earlier" in the list. According to [1] the "spec-ctrl" and "ssbd" CPU features require host CPU microcode (i.e. that the host is detected as the "-IBRS" model) before it can be used for guest CPUs. This means that a "Skylake-Server" host cannot support a "Broadwell-IBRS" guest, which violates the design of the VCpuModelFilter. I think as part of adding the -IBRS models we'll have to also modify the filter itself. Chris [1] https://www.berrange.com/posts/2018/06/29/cpu-model-configuration-for-qemu-k... On 11/13/2018 11:54 PM, Sun, Austin wrote:
Hi All: if install StarlingX in compute-node with cpu type 'Skylake-Server-IBRS' , it cannot use 'passthrough' type with keyword hw:cpu_model in favor to create instance It will prompt "No valid host was found. There are not enough hosts available. computer-0: (VCpuModelFilter) Host VCPU model Skylake-Server-IBRS required Passthrough Code 501" After investigation , Libvirt 4.7.0 supports *IBRS (for example IvyBridge-IBRS, Skylake-Server-IBRS) CPU model , but nova and meta favor does not support *IBRS CPU model yet.
I have made patch for nova[0] and glance[1]. Nova[0] will support *-IBRS type vcpu when select passthrough Glance[1] will add metadata to support *-IBRS in hw:cpu_model
Please review these PRs.
Thanks. BR Austin Sun.
[0] https://github.com/starlingx-staging/stx-nova/pull/15 [1] https://github.com/starlingx-staging/stx-glance/pull/4
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On 11/16/2018 8:59 PM, Sun, Austin wrote:
Hi Chris: Thanks your review. I have made new patch [1] based on your suggestion. Could you help review it again ?
https://github.com/austinsun/stx-nova/commit/3255facb16b70b138ff12243822b43d...
The code looks okay, the git commit message looks like it was partially duplicated. Chris
Hi Chris: Very appreciate your review The new PRs are https://github.com/starlingx-staging/stx-nova/pull/17 https://github.com/starlingx-staging/stx-glance/pull/5 Thanks. BR Austin Sun. -----Original Message----- From: Chris Friesen [mailto:chris.friesen@windriver.com] Sent: Wednesday, November 21, 2018 11:41 PM To: Sun, Austin <austin.sun@intel.com>; starlingx-discuss@lists.starlingx.io Subject: Re: [Starlingx-discuss] Support IBRS cpu model. On 11/16/2018 8:59 PM, Sun, Austin wrote:
Hi Chris: Thanks your review. I have made new patch [1] based on your suggestion. Could you help review it again ?
https://github.com/austinsun/stx-nova/commit/3255facb16b70b138ff122438 22b43d1824f6890#diff-6955c78b8a0da8ec1cbf33c3834de1e0
The code looks okay, the git commit message looks like it was partially duplicated. Chris
On 11/21/2018 11:46 PM, Sun, Austin wrote:
Hi Chris: Very appreciate your review The new PRs are https://github.com/starlingx-staging/stx-nova/pull/17 https://github.com/starlingx-staging/stx-glance/pull/5
What testing have you done on these changes? Chris
Hi Chris: Due to resource limitation , I only deployed in Skylake-IBIS server , create VM enabling cpu-passthrough. Thanks. BR Austin Sun. -----Original Message----- From: Chris Friesen [mailto:chris.friesen@windriver.com] Sent: Friday, November 23, 2018 1:42 AM To: Sun, Austin <austin.sun@intel.com>; starlingx-discuss@lists.starlingx.io Subject: Re: [Starlingx-discuss] Support IBRS cpu model. On 11/21/2018 11:46 PM, Sun, Austin wrote:
Hi Chris: Very appreciate your review The new PRs are https://github.com/starlingx-staging/stx-nova/pull/17 https://github.com/starlingx-staging/stx-glance/pull/5
What testing have you done on these changes? Chris
In order to ensure that we don't break existing code, I think we'd also need to test by booting VMs built using at least a flavor that specifies a different IBRS CPU model and a different non-IBRS CPU model. Chris On 11/23/2018 12:16 AM, Sun, Austin wrote:
Hi Chris: Due to resource limitation , I only deployed in Skylake-IBIS server , create VM enabling cpu-passthrough.
Thanks. BR Austin Sun. -----Original Message----- From: Chris Friesen [mailto:chris.friesen@windriver.com] Sent: Friday, November 23, 2018 1:42 AM To: Sun, Austin <austin.sun@intel.com>; starlingx-discuss@lists.starlingx.io Subject: Re: [Starlingx-discuss] Support IBRS cpu model.
On 11/21/2018 11:46 PM, Sun, Austin wrote:
Hi Chris: Very appreciate your review The new PRs are https://github.com/starlingx-staging/stx-nova/pull/17 https://github.com/starlingx-staging/stx-glance/pull/5
What testing have you done on these changes?
Chris
Hi Chris: Thanks your suggestion. I have done some more test . Here is the result. Compute CPU: Skylake-IBRS, If we created VM with non-IBRS CPU model(Skylake-server, Broadwell etc), it worked fine with patch. But when create VM with IBRS CPU model, Qemu will report below error "2018-11-27T08:42:23.764924Z qemu-kvm: can't apply global Broadwell-x86_64-cpu.spec-ctrl=on: Property '.spec-ctrl' not found" Or "qemu-kvm: can't apply global Skylake-Server-x86_64-cpu.spec-ctrl=on: Property '.spec-ctrl' not found" From link[1]: it seems we have to upgrade qemu to check if we can fully support *IBRS cpu model. Currently we can only create non-IBRS CPU model or passthrough with those two patches [2] and [3] [1] https://bugzilla.redhat.com/show_bug.cgi?id=1532401 [2] https://github.com/starlingx-staging/stx-nova/pull/17 [3] https://github.com/starlingx-staging/stx-glance/pull/5 Thanks. BR Austin Sun. -----Original Message----- From: Chris Friesen [mailto:chris.friesen@windriver.com] Sent: Friday, November 23, 2018 11:08 PM To: Sun, Austin <austin.sun@intel.com>; starlingx-discuss@lists.starlingx.io Subject: Re: [Starlingx-discuss] Support IBRS cpu model. In order to ensure that we don't break existing code, I think we'd also need to test by booting VMs built using at least a flavor that specifies a different IBRS CPU model and a different non-IBRS CPU model. Chris On 11/23/2018 12:16 AM, Sun, Austin wrote:
Hi Chris: Due to resource limitation , I only deployed in Skylake-IBIS server , create VM enabling cpu-passthrough.
Thanks. BR Austin Sun. -----Original Message----- From: Chris Friesen [mailto:chris.friesen@windriver.com] Sent: Friday, November 23, 2018 1:42 AM To: Sun, Austin <austin.sun@intel.com>; starlingx-discuss@lists.starlingx.io Subject: Re: [Starlingx-discuss] Support IBRS cpu model.
On 11/21/2018 11:46 PM, Sun, Austin wrote:
Hi Chris: Very appreciate your review The new PRs are https://github.com/starlingx-staging/stx-nova/pull/17 https://github.com/starlingx-staging/stx-glance/pull/5
What testing have you done on these changes?
Chris
Hi Chris and All: More info for Qemu to support IBRS. Qemu 2.10 is used in StarlingX. From [1] and [2], Qemu 2.12.1 will start supporting spec-ctrl/IBRS chip support. [1] https://www.qemu.org/2018/02/14/qemu-2-11-1-and-spectre-update/ [2] https://wiki.qemu.org/ChangeLog/2.12 Thanks. BR Austin Sun. -----Original Message----- From: Sun, Austin Sent: Tuesday, November 27, 2018 5:18 PM To: 'Chris Friesen' <chris.friesen@windriver.com>; starlingx-discuss@lists.starlingx.io Subject: RE: [Starlingx-discuss] Support IBRS cpu model. Hi Chris: Thanks your suggestion. I have done some more test . Here is the result. Compute CPU: Skylake-IBRS, If we created VM with non-IBRS CPU model(Skylake-server, Broadwell etc), it worked fine with patch. But when create VM with IBRS CPU model, Qemu will report below error "2018-11-27T08:42:23.764924Z qemu-kvm: can't apply global Broadwell-x86_64-cpu.spec-ctrl=on: Property '.spec-ctrl' not found" Or "qemu-kvm: can't apply global Skylake-Server-x86_64-cpu.spec-ctrl=on: Property '.spec-ctrl' not found" From link[1]: it seems we have to upgrade qemu to check if we can fully support *IBRS cpu model. Currently we can only create non-IBRS CPU model or passthrough with those two patches [2] and [3] [1] https://bugzilla.redhat.com/show_bug.cgi?id=1532401 [2] https://github.com/starlingx-staging/stx-nova/pull/17 [3] https://github.com/starlingx-staging/stx-glance/pull/5 Thanks. BR Austin Sun. -----Original Message----- From: Chris Friesen [mailto:chris.friesen@windriver.com] Sent: Friday, November 23, 2018 11:08 PM To: Sun, Austin <austin.sun@intel.com>; starlingx-discuss@lists.starlingx.io Subject: Re: [Starlingx-discuss] Support IBRS cpu model. In order to ensure that we don't break existing code, I think we'd also need to test by booting VMs built using at least a flavor that specifies a different IBRS CPU model and a different non-IBRS CPU model. Chris On 11/23/2018 12:16 AM, Sun, Austin wrote:
Hi Chris: Due to resource limitation , I only deployed in Skylake-IBIS server , create VM enabling cpu-passthrough.
Thanks. BR Austin Sun. -----Original Message----- From: Chris Friesen [mailto:chris.friesen@windriver.com] Sent: Friday, November 23, 2018 1:42 AM To: Sun, Austin <austin.sun@intel.com>; starlingx-discuss@lists.starlingx.io Subject: Re: [Starlingx-discuss] Support IBRS cpu model.
On 11/21/2018 11:46 PM, Sun, Austin wrote:
Hi Chris: Very appreciate your review The new PRs are https://github.com/starlingx-staging/stx-nova/pull/17 https://github.com/starlingx-staging/stx-glance/pull/5
What testing have you done on these changes?
Chris
Just a fyi. QEMU is in the process of being up versioned to 3.0 Brent -----Original Message----- From: Sun, Austin [mailto:austin.sun@intel.com] Sent: Wednesday, November 28, 2018 1:45 AM To: Friesen, Chris <Chris.Friesen@windriver.com>; starlingx-discuss@lists.starlingx.io Subject: Re: [Starlingx-discuss] Support IBRS cpu model. Hi Chris and All: More info for Qemu to support IBRS. Qemu 2.10 is used in StarlingX. From [1] and [2], Qemu 2.12.1 will start supporting spec-ctrl/IBRS chip support. [1] https://www.qemu.org/2018/02/14/qemu-2-11-1-and-spectre-update/ [2] https://wiki.qemu.org/ChangeLog/2.12 Thanks. BR Austin Sun. -----Original Message----- From: Sun, Austin Sent: Tuesday, November 27, 2018 5:18 PM To: 'Chris Friesen' <chris.friesen@windriver.com>; starlingx-discuss@lists.starlingx.io Subject: RE: [Starlingx-discuss] Support IBRS cpu model. Hi Chris: Thanks your suggestion. I have done some more test . Here is the result. Compute CPU: Skylake-IBRS, If we created VM with non-IBRS CPU model(Skylake-server, Broadwell etc), it worked fine with patch. But when create VM with IBRS CPU model, Qemu will report below error "2018-11-27T08:42:23.764924Z qemu-kvm: can't apply global Broadwell-x86_64-cpu.spec-ctrl=on: Property '.spec-ctrl' not found" Or "qemu-kvm: can't apply global Skylake-Server-x86_64-cpu.spec-ctrl=on: Property '.spec-ctrl' not found" From link[1]: it seems we have to upgrade qemu to check if we can fully support *IBRS cpu model. Currently we can only create non-IBRS CPU model or passthrough with those two patches [2] and [3] [1] https://bugzilla.redhat.com/show_bug.cgi?id=1532401 [2] https://github.com/starlingx-staging/stx-nova/pull/17 [3] https://github.com/starlingx-staging/stx-glance/pull/5 Thanks. BR Austin Sun. -----Original Message----- From: Chris Friesen [mailto:chris.friesen@windriver.com] Sent: Friday, November 23, 2018 11:08 PM To: Sun, Austin <austin.sun@intel.com>; starlingx-discuss@lists.starlingx.io Subject: Re: [Starlingx-discuss] Support IBRS cpu model. In order to ensure that we don't break existing code, I think we'd also need to test by booting VMs built using at least a flavor that specifies a different IBRS CPU model and a different non-IBRS CPU model. Chris On 11/23/2018 12:16 AM, Sun, Austin wrote:
Hi Chris: Due to resource limitation , I only deployed in Skylake-IBIS server , create VM enabling cpu-passthrough.
Thanks. BR Austin Sun. -----Original Message----- From: Chris Friesen [mailto:chris.friesen@windriver.com] Sent: Friday, November 23, 2018 1:42 AM To: Sun, Austin <austin.sun@intel.com>; starlingx-discuss@lists.starlingx.io Subject: Re: [Starlingx-discuss] Support IBRS cpu model.
On 11/21/2018 11:46 PM, Sun, Austin wrote:
Hi Chris: Very appreciate your review The new PRs are https://github.com/starlingx-staging/stx-nova/pull/17 https://github.com/starlingx-staging/stx-glance/pull/5
What testing have you done on these changes?
Chris
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Hi Brent , Chris and all : With cherry-picking qemu 3.0 (qemu-img version 3.0.0 (qemu-kvm-ev-3.0.0-0.tis.97)) change [1] and [2] , VM with Skylake-Server-IBRS , Skylake-Server and passthrough cpu-model can be successfully created. The PR [3] and [4] are for nova and glance(flavor) changes. [1] https://github.com/jsomervi/stx-qemu/commits/working-3.0.0-noavp-12 [2] https://review.openstack.org/#/c/622583/ [3] https://github.com/starlingx-staging/stx-nova/pull/17 [4] https://github.com/starlingx-staging/stx-glance/pull/5 Thanks. BR Austin Sun. -----Original Message----- From: Rowsell, Brent [mailto:Brent.Rowsell@windriver.com] Sent: Wednesday, November 28, 2018 7:38 PM To: Sun, Austin <austin.sun@intel.com>; Friesen, Chris <Chris.Friesen@windriver.com>; starlingx-discuss@lists.starlingx.io Subject: RE: [Starlingx-discuss] Support IBRS cpu model. Just a fyi. QEMU is in the process of being up versioned to 3.0 Brent -----Original Message----- From: Sun, Austin [mailto:austin.sun@intel.com] Sent: Wednesday, November 28, 2018 1:45 AM To: Friesen, Chris <Chris.Friesen@windriver.com>; starlingx-discuss@lists.starlingx.io Subject: Re: [Starlingx-discuss] Support IBRS cpu model. Hi Chris and All: More info for Qemu to support IBRS. Qemu 2.10 is used in StarlingX. From [1] and [2], Qemu 2.12.1 will start supporting spec-ctrl/IBRS chip support. [1] https://www.qemu.org/2018/02/14/qemu-2-11-1-and-spectre-update/ [2] https://wiki.qemu.org/ChangeLog/2.12 Thanks. BR Austin Sun. -----Original Message----- From: Sun, Austin Sent: Tuesday, November 27, 2018 5:18 PM To: 'Chris Friesen' <chris.friesen@windriver.com>; starlingx-discuss@lists.starlingx.io Subject: RE: [Starlingx-discuss] Support IBRS cpu model. Hi Chris: Thanks your suggestion. I have done some more test . Here is the result. Compute CPU: Skylake-IBRS, If we created VM with non-IBRS CPU model(Skylake-server, Broadwell etc), it worked fine with patch. But when create VM with IBRS CPU model, Qemu will report below error "2018-11-27T08:42:23.764924Z qemu-kvm: can't apply global Broadwell-x86_64-cpu.spec-ctrl=on: Property '.spec-ctrl' not found" Or "qemu-kvm: can't apply global Skylake-Server-x86_64-cpu.spec-ctrl=on: Property '.spec-ctrl' not found" From link[1]: it seems we have to upgrade qemu to check if we can fully support *IBRS cpu model. Currently we can only create non-IBRS CPU model or passthrough with those two patches [2] and [3] [1] https://bugzilla.redhat.com/show_bug.cgi?id=1532401 [2] https://github.com/starlingx-staging/stx-nova/pull/17 [3] https://github.com/starlingx-staging/stx-glance/pull/5 Thanks. BR Austin Sun. -----Original Message----- From: Chris Friesen [mailto:chris.friesen@windriver.com] Sent: Friday, November 23, 2018 11:08 PM To: Sun, Austin <austin.sun@intel.com>; starlingx-discuss@lists.starlingx.io Subject: Re: [Starlingx-discuss] Support IBRS cpu model. In order to ensure that we don't break existing code, I think we'd also need to test by booting VMs built using at least a flavor that specifies a different IBRS CPU model and a different non-IBRS CPU model. Chris On 11/23/2018 12:16 AM, Sun, Austin wrote:
Hi Chris: Due to resource limitation , I only deployed in Skylake-IBIS server , create VM enabling cpu-passthrough.
Thanks. BR Austin Sun. -----Original Message----- From: Chris Friesen [mailto:chris.friesen@windriver.com] Sent: Friday, November 23, 2018 1:42 AM To: Sun, Austin <austin.sun@intel.com>; starlingx-discuss@lists.starlingx.io Subject: Re: [Starlingx-discuss] Support IBRS cpu model.
On 11/21/2018 11:46 PM, Sun, Austin wrote:
Hi Chris: Very appreciate your review The new PRs are https://github.com/starlingx-staging/stx-nova/pull/17 https://github.com/starlingx-staging/stx-glance/pull/5
What testing have you done on these changes?
Chris
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participants (4)
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Chris Friesen
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Rowsell, Brent
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Sun, Austin
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Xie, Cindy