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From 31f2edcd7f42cda4173eabad879bfc318c202c9e Mon Sep 17 00:00:00 2001
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Message-Id: <31f2edcd7f42cda4173eabad879bfc318c202c9e@dist-git>
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From: Pavel Hrdina <phrdina@redhat.com>
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Date: Tue, 17 Jan 2023 10:33:22 +0100
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Subject: [PATCH] docs: document correct cpu shares limits with both cgroups v1
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and v2
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The limits are different with cgroups v1 and v2 but our XML
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documentation and virsh manpage mentioned only cgroups v1 limits without
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explicitly saying it only applies to cgroups v1.
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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
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Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
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(cherry picked from commit ead6e1b00285cbd98e0f0727efb8adcb29ebc1ba)
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Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2037998
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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
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---
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docs/formatdomain.rst | 2 +-
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docs/manpages/virsh.rst | 3 ++-
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2 files changed, 3 insertions(+), 2 deletions(-)
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diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst
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index 490a954745..8fc8aeb928 100644
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--- a/docs/formatdomain.rst
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+++ b/docs/formatdomain.rst
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@@ -849,7 +849,7 @@ CPU Tuning
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There is no unit for the value, it's a relative measure based on the setting
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of other VM, e.g. A VM configured with value 2048 will get twice as much CPU
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time as a VM configured with value 1024. The value should be in range
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- [2, 262144]. :since:`Since 0.9.0`
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+ [2, 262144] using cgroups v1, [1, 10000] using cgroups v2. :since:`Since 0.9.0`
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``period``
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The optional ``period`` element specifies the enforcement interval (unit:
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microseconds). Within ``period``, each vCPU of the domain will not be allowed
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diff --git a/docs/manpages/virsh.rst b/docs/manpages/virsh.rst
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index 88b7fa1da8..d5b614dc03 100644
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--- a/docs/manpages/virsh.rst
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+++ b/docs/manpages/virsh.rst
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@@ -4054,7 +4054,8 @@ If *--config* is specified, affect the next start of a persistent guest.
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If *--current* is specified, it is equivalent to either *--live* or
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*--config*, depending on the current state of the guest.
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-``Note``: The cpu_shares parameter has a valid value range of 2-262144.
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+``Note``: The cpu_shares parameter has a valid value range of 2-262144
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+with cgroups v1, 1-10000 with cgroups v2.
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``Note``: The weight and cap parameters are defined only for the
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XEN_CREDIT scheduler.
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--
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2.39.1
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