| 2018-11-02 07:16:10 |
Daniel Axtens |
bug |
|
|
added bug |
| 2018-11-02 07:16:37 |
Daniel Axtens |
description |
In current Ubuntu kernels, PV blkfront drivers have blk-mq enabled by default.
[Impact]
blk-mq is not as fast as the old request-based scheduler for some workloads on HDD disks.
[Fix]
Amazon Linux has a commit which reintroduces the request-based mode. It disables blk-mq by default but allows it to be switched back on with a kernel parameter.
[Regression Potential]
Could potentially break xen based disks on AWS. For B/C, the patches also add some code to the xen core around suspend and resume, this code is much smaller and also mirrors code already in Xenial.
[Tests]
Tested by AWS for Xenial, and their kernel engineers vetted the patches. I tested the Bionic and Cosmic patchsets with fio, the system appears stable and the IOPS promised for EBS Provisioned IOPS disks were met in my testing. |
In current Ubuntu kernels, PV blkfront drivers have blk-mq enabled by default and cannot use the old I/O scheduler.
[Impact]
blk-mq is not as fast as the old request-based scheduler for some workloads on HDD disks.
[Fix]
Amazon Linux has a commit which reintroduces the request-based mode. It disables blk-mq by default but allows it to be switched back on with a kernel parameter.
[Regression Potential]
Could potentially break xen based disks on AWS. For B/C, the patches also add some code to the xen core around suspend and resume, this code is much smaller and also mirrors code already in Xenial.
[Tests]
Tested by AWS for Xenial, and their kernel engineers vetted the patches. I tested the Bionic and Cosmic patchsets with fio, the system appears stable and the IOPS promised for EBS Provisioned IOPS disks were met in my testing. |
|
| 2018-11-02 07:17:37 |
Daniel Axtens |
description |
In current Ubuntu kernels, PV blkfront drivers have blk-mq enabled by default and cannot use the old I/O scheduler.
[Impact]
blk-mq is not as fast as the old request-based scheduler for some workloads on HDD disks.
[Fix]
Amazon Linux has a commit which reintroduces the request-based mode. It disables blk-mq by default but allows it to be switched back on with a kernel parameter.
[Regression Potential]
Could potentially break xen based disks on AWS. For B/C, the patches also add some code to the xen core around suspend and resume, this code is much smaller and also mirrors code already in Xenial.
[Tests]
Tested by AWS for Xenial, and their kernel engineers vetted the patches. I tested the Bionic and Cosmic patchsets with fio, the system appears stable and the IOPS promised for EBS Provisioned IOPS disks were met in my testing. |
In current Ubuntu kernels, PV blkfront drivers have blk-mq enabled by default and cannot use the old I/O scheduler.
[Impact]
blk-mq is not as fast as the old request-based scheduler for some workloads on HDD disks.
[Fix]
Amazon Linux has a commit which reintroduces the request-based mode. It disables blk-mq by default but allows it to be switched back on with a kernel parameter.
[Regression Potential]
Could potentially break xen based disks on AWS. For B/C, the patches also add some code to the xen core around suspend and resume, this code is much smaller and also mirrors code already in Xenial.
[Tests]
Tested by AWS for Xenial, and their kernel engineers vetted the patches. I tested the Bionic and Cosmic patchsets with fio, the system appears stable and the IOPS promised for EBS Provisioned IOPS disks were met in my testing. I did an apt update/upgrade and everything worked (no hash-sum mismatches). |
|
| 2018-11-02 07:26:01 |
Daniel Axtens |
description |
In current Ubuntu kernels, PV blkfront drivers have blk-mq enabled by default and cannot use the old I/O scheduler.
[Impact]
blk-mq is not as fast as the old request-based scheduler for some workloads on HDD disks.
[Fix]
Amazon Linux has a commit which reintroduces the request-based mode. It disables blk-mq by default but allows it to be switched back on with a kernel parameter.
[Regression Potential]
Could potentially break xen based disks on AWS. For B/C, the patches also add some code to the xen core around suspend and resume, this code is much smaller and also mirrors code already in Xenial.
[Tests]
Tested by AWS for Xenial, and their kernel engineers vetted the patches. I tested the Bionic and Cosmic patchsets with fio, the system appears stable and the IOPS promised for EBS Provisioned IOPS disks were met in my testing. I did an apt update/upgrade and everything worked (no hash-sum mismatches). |
In current Ubuntu kernels, PV blkfront drivers have blk-mq enabled by default and cannot use the old I/O scheduler.
[Impact]
blk-mq is not as fast as the old request-based scheduler for some workloads on HDD disks.
[Fix]
Amazon Linux has a commit which reintroduces the request-based mode. It disables blk-mq by default but allows it to be switched back on with a kernel parameter.
For B/C this patchset is bigger as it includes the suspend/resume patches already in X, and a new fixup. These are desirable as the request mode patch assumes their presence.
[Regression Potential]
Could potentially break xen based disks on AWS.
For B/C, the patches also add some code to the xen core around suspend and resume, this code is much smaller and also mirrors code already in Xenial.
[Tests]
Tested by AWS for Xenial, and their kernel engineers vetted the patches. I tested the Bionic and Cosmic patchsets with fio, the system appears stable and the IOPS promised for EBS Provisioned IOPS disks were met in my testing. I did an apt update/upgrade and everything worked (no hash-sum mismatches). |
|
| 2018-11-02 07:27:28 |
Daniel Axtens |
description |
In current Ubuntu kernels, PV blkfront drivers have blk-mq enabled by default and cannot use the old I/O scheduler.
[Impact]
blk-mq is not as fast as the old request-based scheduler for some workloads on HDD disks.
[Fix]
Amazon Linux has a commit which reintroduces the request-based mode. It disables blk-mq by default but allows it to be switched back on with a kernel parameter.
For B/C this patchset is bigger as it includes the suspend/resume patches already in X, and a new fixup. These are desirable as the request mode patch assumes their presence.
[Regression Potential]
Could potentially break xen based disks on AWS.
For B/C, the patches also add some code to the xen core around suspend and resume, this code is much smaller and also mirrors code already in Xenial.
[Tests]
Tested by AWS for Xenial, and their kernel engineers vetted the patches. I tested the Bionic and Cosmic patchsets with fio, the system appears stable and the IOPS promised for EBS Provisioned IOPS disks were met in my testing. I did an apt update/upgrade and everything worked (no hash-sum mismatches). |
In current Ubuntu kernels, PV blkfront drivers have blk-mq enabled by default and cannot use the old I/O scheduler.
[Impact]
blk-mq is not as fast as the old request-based scheduler for some workloads on HDD disks.
[Fix]
Amazon Linux has a commit which reintroduces the request-based mode. It disables blk-mq by default but allows it to be switched back on with a kernel parameter.
For X this needs a small patch from upstream for error handling.
For B/C this patchset is bigger as it includes the suspend/resume patches already in X, and a new fixup. These are desirable as the request mode patch assumes their presence.
[Regression Potential]
Could potentially break xen based disks on AWS.
For B/C, the patches also add some code to the xen core around suspend and resume, this code is much smaller and also mirrors code already in Xenial.
[Tests]
Tested by AWS for Xenial, and their kernel engineers vetted the patches. I tested the Bionic and Cosmic patchsets with fio, the system appears stable and the IOPS promised for EBS Provisioned IOPS disks were met in my testing. I did an apt update/upgrade and everything worked (no hash-sum mismatches). |
|
| 2018-11-08 06:07:57 |
Khaled El Mously |
linux (Ubuntu): status |
Confirmed |
Fix Committed |
|
| 2018-11-09 09:54:29 |
Mauricio Faria de Oliveira |
bug |
|
|
added subscriber Mauricio Faria de Oliveira |
| 2018-11-21 16:36:21 |
Kamal Mostafa |
nominated for series |
|
Ubuntu Trusty |
|
| 2018-11-21 16:36:21 |
Kamal Mostafa |
bug task added |
|
linux (Ubuntu Trusty) |
|
| 2018-11-21 16:36:21 |
Kamal Mostafa |
nominated for series |
|
Ubuntu Disco |
|
| 2018-11-21 16:36:21 |
Kamal Mostafa |
bug task added |
|
linux (Ubuntu Disco) |
|
| 2018-11-21 16:36:21 |
Kamal Mostafa |
nominated for series |
|
Ubuntu Xenial |
|
| 2018-11-21 16:36:21 |
Kamal Mostafa |
bug task added |
|
linux (Ubuntu Xenial) |
|
| 2018-11-21 16:36:21 |
Kamal Mostafa |
nominated for series |
|
Ubuntu Bionic |
|
| 2018-11-21 16:36:21 |
Kamal Mostafa |
bug task added |
|
linux (Ubuntu Bionic) |
|
| 2018-11-21 16:36:21 |
Kamal Mostafa |
nominated for series |
|
Ubuntu Cosmic |
|
| 2018-11-21 16:36:21 |
Kamal Mostafa |
bug task added |
|
linux (Ubuntu Cosmic) |
|
| 2018-11-21 16:36:36 |
Kamal Mostafa |
linux (Ubuntu Disco): status |
Fix Committed |
Triaged |
|
| 2018-11-21 16:36:40 |
Kamal Mostafa |
linux (Ubuntu Cosmic): status |
New |
Fix Committed |
|
| 2018-11-21 16:36:43 |
Kamal Mostafa |
linux (Ubuntu Bionic): status |
New |
Fix Committed |
|
| 2018-11-21 16:36:46 |
Kamal Mostafa |
linux (Ubuntu Xenial): status |
New |
Fix Committed |
|
| 2018-11-21 16:36:48 |
Kamal Mostafa |
linux (Ubuntu Trusty): status |
New |
In Progress |
|
| 2018-11-21 17:57:13 |
Kamal Mostafa |
linux (Ubuntu Trusty): status |
In Progress |
Fix Committed |
|
| 2018-12-21 17:14:22 |
Kamal Mostafa |
bug task added |
|
linux-aws (Ubuntu) |
|
| 2018-12-21 17:14:38 |
Kamal Mostafa |
bug task deleted |
linux (Ubuntu) |
|
|
| 2018-12-21 17:14:52 |
Kamal Mostafa |
linux-aws (Ubuntu Trusty): status |
New |
Fix Released |
|
| 2018-12-21 17:15:01 |
Kamal Mostafa |
linux-aws (Ubuntu Xenial): status |
New |
Fix Released |
|
| 2018-12-21 17:15:09 |
Kamal Mostafa |
linux-aws (Ubuntu Bionic): status |
New |
Fix Released |
|
| 2018-12-21 17:15:17 |
Kamal Mostafa |
linux-aws (Ubuntu Cosmic): status |
New |
Fix Released |
|
| 2018-12-21 17:15:25 |
Kamal Mostafa |
linux-aws (Ubuntu Disco): status |
New |
Fix Released |
|
| 2020-07-02 19:55:35 |
Steve Langasek |
linux (Ubuntu Disco): status |
Triaged |
Won't Fix |
|
