| 2020-11-16 20:03:37 |
Joseph Salisbury |
bug |
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added bug |
| 2020-12-11 13:56:00 |
Marcelo Cerri |
bug task added |
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linux-azure-4.15 (Ubuntu) |
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| 2020-12-11 19:40:33 |
Marcelo Cerri |
bug task deleted |
linux-azure-4.15 (Ubuntu) |
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| 2020-12-11 19:40:43 |
Marcelo Cerri |
nominated for series |
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Ubuntu Groovy |
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| 2020-12-11 19:40:43 |
Marcelo Cerri |
bug task added |
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linux-azure (Ubuntu Groovy) |
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| 2020-12-11 19:40:43 |
Marcelo Cerri |
nominated for series |
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Ubuntu Focal |
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| 2020-12-11 19:40:43 |
Marcelo Cerri |
bug task added |
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linux-azure (Ubuntu Focal) |
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| 2020-12-11 19:40:51 |
Marcelo Cerri |
linux-azure (Ubuntu Focal): assignee |
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Marcelo Cerri (mhcerri) |
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| 2020-12-11 19:40:55 |
Marcelo Cerri |
linux-azure (Ubuntu Groovy): assignee |
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Marcelo Cerri (mhcerri) |
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| 2020-12-11 19:40:56 |
Marcelo Cerri |
linux-azure (Ubuntu Focal): status |
New |
In Progress |
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| 2020-12-11 19:40:57 |
Marcelo Cerri |
linux-azure (Ubuntu Groovy): status |
New |
In Progress |
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| 2020-12-11 19:45:36 |
Marcelo Cerri |
description |
Microsoft would like to request the following upstream commit in all releases supported on Azure. This commit improves a signification delay in hibernation/resume:
55c4478a8f0e("PM: hibernate: Batch hibernate and resume IO requests")
Details of this commit:
Hibernate and resume process submits individual IO requests for each page of the data, so use blk_plug to improve the batching of these requests.
Testing this change with hibernate and resumes consistently shows merging of the IO requests and more than an order of magnitude improvement in hibernate and resume speed is observed.
One hibernate and resume cycle for 16GB RAM out of 32GB in use takes around 21 minutes before the change, and 1 minutes after the change on a system with limited storage IOPS. |
[Impact]
Microsoft would like to request the following upstream commit in all releases supported on Azure. This commit improves a signification delay in hibernation/resume:
55c4478a8f0e("PM: hibernate: Batch hibernate and resume IO requests")
Details of this commit:
Hibernate and resume process submits individual IO requests for each page of the data, so use blk_plug to improve the batching of these requests.
Testing this change with hibernate and resumes consistently shows merging of the IO requests and more than an order of magnitude improvement in hibernate and resume speed is observed.
One hibernate and resume cycle for 16GB RAM out of 32GB in use takes around 21 minutes before the change, and 1 minutes after the change on a system with limited storage IOPS.
[Test Case]
Follow the steps described here:
https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1880032/comments/14
And compare the time need to save the instance state.
[Where problems could occur]
Considering the size of the patch and the code it touches, the most likely issues are related to hibernation itself. Considering the hibernation isn't officially support, any hibernation issues should even considered regressions. |
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| 2020-12-17 20:26:15 |
Ian May |
linux-azure (Ubuntu Focal): status |
In Progress |
Fix Committed |
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| 2020-12-17 20:26:19 |
Ian May |
linux-azure (Ubuntu Groovy): status |
In Progress |
Fix Committed |
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| 2021-01-26 21:48:58 |
Launchpad Janitor |
linux-azure (Ubuntu Focal): status |
Fix Committed |
Fix Released |
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| 2021-01-26 21:48:58 |
Launchpad Janitor |
cve linked |
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2020-16120 |
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| 2021-01-26 21:48:58 |
Launchpad Janitor |
cve linked |
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2020-28374 |
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| 2021-01-26 21:52:52 |
Launchpad Janitor |
linux-azure (Ubuntu Groovy): status |
Fix Committed |
Fix Released |
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| 2021-02-19 23:03:50 |
Launchpad Janitor |
linux-azure (Ubuntu): status |
New |
Fix Released |
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