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docs: document correct cpu shares limits with both cgroups v1 and v2

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The limits are different with cgroups v1 and v2 but our XML
documentation and virsh manpage mentioned only cgroups v1 limits without
explicitly saying it only applies to cgroups v1.

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
This commit is contained in:
Pavel Hrdina 2023-01-17 10:33:22 +01:00
parent 38af649761
commit ead6e1b002
2 changed files with 3 additions and 2 deletions
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2
docs/formatdomain.rst
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@ -849,7 +849,7 @@ CPU Tuning
There is no unit for the value, it's a relative measure based on the setting
of other VM, e.g. A VM configured with value 2048 will get twice as much CPU
time as a VM configured with value 1024. The value should be in range
[2, 262144]. :since:`Since 0.9.0`
[2, 262144] using cgroups v1, [1, 10000] using cgroups v2. :since:`Since 0.9.0`
``period``
The optional ``period`` element specifies the enforcement interval (unit:
microseconds). Within ``period``, each vCPU of the domain will not be allowed

3
docs/manpages/virsh.rst
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@ -4054,7 +4054,8 @@ If *--config* is specified, affect the next start of a persistent guest.
If *--current* is specified, it is equivalent to either *--live* or
*--config*, depending on the current state of the guest.
``Note``: The cpu_shares parameter has a valid value range of 2-262144.
``Note``: The cpu_shares parameter has a valid value range of 2-262144
with cgroups v1, 1-10000 with cgroups v2.
``Note``: The weight and cap parameters are defined only for the
XEN_CREDIT scheduler.