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Groups > linux.debian.kernel > #67971 > unrolled thread
| Started by | Noah Meyerhans <noahm@debian.org> |
|---|---|
| First post | 2020-09-03 02:20 +0200 |
| Last post | 2020-09-03 23:20 +0200 |
| Articles | 5 — 3 participants |
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Bug#969443: src:linux: none Noah Meyerhans <noahm@debian.org> - 2020-09-03 02:20 +0200
Bug#969443: arm64: please backport stolen time support to buster kernel (Re: src:linux: none) Jonathan Nieder <jrnieder@gmail.com> - 2020-09-03 03:20 +0200
Bug#969443: arm64: please backport stolen time support to buster kernel (Re: src:linux: none) Noah Meyerhans <noahm@debian.org> - 2020-09-03 04:40 +0200
Bug#969443: Info received (Bug#969443: arm64: please backport stolen time support to buster kernel (Re: src:linux: none)) Noah Meyerhans <noahm@debian.org> - 2020-09-03 23:20 +0200
Processed: Re: Bug#969443: Info received (Bug#969443: arm64: please backport stolen time support to buster kernel (Re: src:linux: none)) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2020-09-03 23:20 +0200
| From | Noah Meyerhans <noahm@debian.org> |
|---|---|
| Date | 2020-09-03 02:20 +0200 |
| Subject | Bug#969443: src:linux: none |
| Message-ID | <AKL8R-7Rj-1@gated-at.bofh.it> |
Package: src:linux Version: 4.19.132-1 Severity: important Tags: buster When used in virtual machine environments, Linux on amd64 is able to report "steal time" to the guest. This functionality has been supported by Linux on amd64 for years, but was only added to arm64 with Linux 5.5. As Debian and arm64 are increasingly used in virtual environments, including cloud environments, the ability to report steal time is increasingly important for system monitoring and performance analysis. Thus, I'd like to request that CPU steal time accounting support for arm64 be backported to buster, if possible. noah
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| From | Jonathan Nieder <jrnieder@gmail.com> |
|---|---|
| Date | 2020-09-03 03:20 +0200 |
| Subject | Bug#969443: arm64: please backport stolen time support to buster kernel (Re: src:linux: none) |
| Message-ID | <AKM4V-7h-3@gated-at.bofh.it> |
| In reply to | #67971 |
tags 969443 + upstream fixed-upstream severity 969443 wishlist retitle 969443 arm64: please backport stolen time support to buster kernel quit Hi, Noah Meyerhans wrote: > Subject: src:linux: none It looks like you forgot to include a subject line? > When used in virtual machine environments, Linux on amd64 is able to report > "steal time" to the guest. This functionality has been supported by Linux > on amd64 for years, but was only added to arm64 with Linux 5.5. > > As Debian and arm64 are increasingly used in virtual environments, including > cloud environments, the ability to report steal time is increasingly > important for system monitoring and performance analysis. Thus, I'd like to > request that CPU steal time accounting support for arm64 be backported to > buster, if possible. Thanks for reporting. The relevant series is a4b28f5c6798 (Merge remote-tracking branch 'kvmarm/kvm-arm64/stolen-time' into kvmarm-master/next, 2019-10-24). It may be possible to try applying it if you are interested. That said, for this kind of issue that is about new features instead of hardware support, my advice would be to use a more current kernel from backports instead. Thanks and hope that helps, Jonathan
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| From | Noah Meyerhans <noahm@debian.org> |
|---|---|
| Date | 2020-09-03 04:40 +0200 |
| Subject | Bug#969443: arm64: please backport stolen time support to buster kernel (Re: src:linux: none) |
| Message-ID | <AKNkl-16F-1@gated-at.bofh.it> |
| In reply to | #67973 |
On Wed, Sep 02, 2020 at 06:09:46PM -0700, Jonathan Nieder wrote: > > Subject: src:linux: none > > It looks like you forgot to include a subject line? *sigh* Computers are hard. > The relevant series is a4b28f5c6798 (Merge remote-tracking branch > 'kvmarm/kvm-arm64/stolen-time' into kvmarm-master/next, 2019-10-24). > It may be possible to try applying it if you are interested. That is the series I had in mind, yes. I will open a merge request once I have one prepared and tested. > That said, for this kind of issue that is about new features instead > of hardware support, my advice would be to use a more current kernel > from backports instead. That's not an option for users requiring security support. While the prevelance of arm64-based clouds is still relatively low, it is growing. As it becomes more common, the lack of visibility into CPU steal time will become a significant issue for people running in these environments, hence the "important" severity. noah
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| From | Noah Meyerhans <noahm@debian.org> |
|---|---|
| Date | 2020-09-03 23:20 +0200 |
| Subject | Bug#969443: Info received (Bug#969443: arm64: please backport stolen time support to buster kernel (Re: src:linux: none)) |
| Message-ID | <AL4Od-3Q4-1@gated-at.bofh.it> |
| In reply to | #67971 |
Control: tags -1 + patch I've submitted a merge request containing a proposed fix at https://salsa.debian.org/kernel-team/linux/-/merge_requests/268 Tested in an arm64 KVM environment with steal time reporting; validated its behavior against that of the sid kernel.
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| From | "Debian Bug Tracking System" <owner@bugs.debian.org> |
|---|---|
| Date | 2020-09-03 23:20 +0200 |
| Subject | Processed: Re: Bug#969443: Info received (Bug#969443: arm64: please backport stolen time support to buster kernel (Re: src:linux: none)) |
| Message-ID | <AL4Od-3Q4-5@gated-at.bofh.it> |
| In reply to | #67971 |
Processing control commands: > tags -1 + patch Bug #969443 [src:linux] arm64: please backport stolen time support to buster kernel Added tag(s) patch. -- 969443: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=969443 Debian Bug Tracking System Contact owner@bugs.debian.org with problems
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