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| author | Yanan Wang <wangyanan55@huawei.com> | 2021-09-29 10:58:02 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-10-01 15:27:56 +0200 |
| commit | c2511b1632e109130df524121dfb7d2413216d3c (patch) | |
| tree | 57a0a342ab04a4d7a8917b7e7413afbeb6c4226b /docs/about | |
| parent | 7237c7ce772794d6be10b8b987fe4d02dfd76562 (diff) | |
| download | qemu-c2511b1632e109130df524121dfb7d2413216d3c.zip qemu-c2511b1632e109130df524121dfb7d2413216d3c.tar.gz qemu-c2511b1632e109130df524121dfb7d2413216d3c.tar.bz2 | |
machine: Deprecate "parameter=0" SMP configurations
In the SMP configuration, we should either provide a topology
parameter with a reasonable value (greater than zero) or just
omit it and QEMU will compute the missing value.
The users shouldn't provide a configuration with any parameter
of it specified as zero (e.g. -smp 8,sockets=0) which could
possibly cause unexpected results in the -smp parsing. So we
deprecate this kind of configurations since 6.2 by adding the
explicit sanity check.
Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210929025816.21076-3-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'docs/about')
| -rw-r--r-- | docs/about/deprecated.rst | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst index 2f7db9a..0bed6ec 100644 --- a/docs/about/deprecated.rst +++ b/docs/about/deprecated.rst @@ -160,6 +160,21 @@ Use ``-display sdl`` instead. Use ``-display curses`` instead. +``-smp`` ("parameter=0" SMP configurations) (since 6.2) +''''''''''''''''''''''''''''''''''''''''''''''''''''''' + +Specified CPU topology parameters must be greater than zero. + +In the SMP configuration, users should either provide a CPU topology +parameter with a reasonable value (greater than zero) or just omit it +and QEMU will compute the missing value. + +However, historically it was implicitly allowed for users to provide +a parameter with zero value, which is meaningless and could also possibly +cause unexpected results in the -smp parsing. So support for this kind of +configurations (e.g. -smp 8,sockets=0) is deprecated since 6.2 and will +be removed in the near future, users have to ensure that all the topology +members described with -smp are greater than zero. Plugin argument passing through ``arg=<string>`` (since 6.1) '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' |