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Re: [PATCH for-6.1 v2] machine: Disallow specifying topology parameters
Re: [PATCH for-6.1 v2] machine: Disallow specifying topology parameters as zero
Fri, 23 Jul 2021 10:14:46 -0400
mu4e 1.4.15; emacs 27.2
wangyanan (Y) writes:
> Hi Cleber,
> On 2021/7/23 6:25, Cleber Rosa wrote:
>> Yanan Wang writes:
>>> In the SMP configuration, we should either specify a topology
>>> parameter with a reasonable value (equal to or greater than 1)
>>> or just leave it omitted and QEMU will calculate its value.
>>> Configurations which explicitly specify the topology parameters
>>> as zero like "sockets=0" are meaningless, so disallow them.
>>> However, the commit 1e63fe685804d
>>> (machine: pass QAPI struct to mc->smp_parse) has documented that
>>> '0' has the same semantics as omitting a parameter in the qapi
>>> comment for SMPConfiguration. So this patch fixes the doc and
>>> also adds the corresponding sanity check in the smp parsers.
>>> Suggested-by: Andrew Jones <firstname.lastname@example.org>
>>> Signed-off-by: Yanan Wang <email@example.com>
>>> hw/core/machine.c | 14 ++++++++++++++
>>> qapi/machine.json | 6 +++---
>>> qemu-options.hx | 12 +++++++-----
>>> 3 files changed, 24 insertions(+), 8 deletions(-)
>> Hi Yanan,
>> This looks somewhat similar to this very old patch of mine:
>> I'm putting a reference here because I believe the test can be salvaged
>> and slightly adapted for this patch of yours.
>> Let me know if I can help anyhow.
> Thanks for this.
> I was introducing an unit test for the smp parsing in , in which all
> possible valid and invalid smp configs were covered, and actually the
> "parameter=0" stuff was also covered. You can have a look, and
> suggestions are welcome. I'm not sure we need two different tests
> for the same part. :)
Right, I only saw the other series later. Nice work there!